v4.2.0 - CAT control, HamLib commands, performance tweaks

app/build.gradle.kts

@@ -1,3 +1,3 @@
 plugins {
-    alias(libs.plugins.convention.androidAppPlugin)
+    alias(libs.plugins.convention.applicationPlugin)
 }

app/src/main/java/com/rtbishop/look4sat/MainScreen.kt

@@ -17,9 +17,28 @@
  */
 package com.rtbishop.look4sat
 
+import androidx.compose.animation.core.LinearEasing
+import androidx.compose.animation.core.RepeatMode
+import androidx.compose.animation.core.animateFloat
+import androidx.compose.animation.core.infiniteRepeatable
+import androidx.compose.animation.core.rememberInfiniteTransition
 import androidx.compose.animation.core.tween
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.statusBars
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
@@ -27,8 +46,18 @@ import androidx.compose.material3.adaptive.navigationsuite.NavigationSuiteDefaul
 import androidx.compose.material3.adaptive.navigationsuite.NavigationSuiteScaffold
 import androidx.compose.material3.adaptive.navigationsuite.NavigationSuiteType
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.currentBackStackEntryAsState
@@ -36,9 +65,11 @@ import androidx.navigation.compose.rememberNavController
 import com.rtbishop.look4sat.core.presentation.Screen
 import com.rtbishop.look4sat.core.presentation.hasEnoughHeight
 import com.rtbishop.look4sat.core.presentation.hasEnoughWidth
+import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
 import com.rtbishop.look4sat.feature.map.mapDestination
 import com.rtbishop.look4sat.feature.passes.passesDestination
 import com.rtbishop.look4sat.feature.radar.radarDestination
+import com.rtbishop.look4sat.feature.radiocontrol.radioControlDestination
 import com.rtbishop.look4sat.feature.satellites.satellitesDestination
 import com.rtbishop.look4sat.feature.settings.settingsDestination
 
@@ -47,6 +78,12 @@ fun MainScreen(navController: NavHostController = rememberNavController()) {
     val items = listOf(Screen.Satellites, Screen.Passes, Screen.Radar, Screen.Map, Screen.Settings)
     val currentDestination = navController.currentBackStackEntryAsState().value?.destination?.route
     val startDestination = Screen.Passes.route
+
+    // Observe radio tracking state for the status bar
+    val context = LocalContext.current
+    val container = (context.applicationContext as IContainerProvider).getMainContainer()
+    val trackingState by container.radioTrackingService.state.collectAsStateWithLifecycle()
+
     NavigationSuiteScaffold(
         navigationSuiteItems = {
             items.forEach {
@@ -71,20 +108,78 @@ fun MainScreen(navController: NavHostController = rememberNavController()) {
             else -> NavigationSuiteType.ShortNavigationBarMedium
         }
     ) {
+        Column {
         NavHost(
             navController = navController,
             startDestination = startDestination,
             enterTransition =  { fadeIn(animationSpec = tween(350)) },
-            exitTransition = { fadeOut(animationSpec = tween(350)) }
+            exitTransition = { fadeOut(animationSpec = tween(350)) },
+            modifier = Modifier.weight(1f)
         ) {
             satellitesDestination { navController.navigateUp() }
             passesDestination { catNum: Int, aosTime: Long ->
                 val radarRoute = "${Screen.Radar.route}?catNum=${catNum}&aosTime=${aosTime}"
                 navController.navigate(radarRoute)
             }
-            radarDestination { navController.navigateUp() }
+            radarDestination(
+                navigateUp = { navController.navigateUp() },
+                navigateToRadioControl = { catNum, aosTime ->
+                    val route = "${Screen.RadioControl.route}?catNum=$catNum&aosTime=$aosTime"
+                    navController.navigate(route)
+                }
+            )
+            radioControlDestination { navController.navigateUp() }
             mapDestination()
             settingsDestination()
         }
+
+        // Radio tracking status banner (above bottom navigation)
+        if (trackingState.isActive) {
+            val infiniteTransition = rememberInfiniteTransition(label = "trackingPulse")
+            val alpha by infiniteTransition.animateFloat(
+                initialValue = 1f, targetValue = 0.4f,
+                animationSpec = infiniteRepeatable(
+                    animation = tween(1000, easing = LinearEasing),
+                    repeatMode = RepeatMode.Reverse
+                ), label = "pulseAlpha"
+            )
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .background(MaterialTheme.colorScheme.primaryContainer)
+                    .clickable {
+                        val pass = trackingState.currentPass
+                        if (pass != null) {
+                            val route = "${Screen.RadioControl.route}?catNum=${pass.catNum}&aosTime=${pass.aosTime}"
+                            navController.navigate(route)
+                        }
+                    }
+                    .padding(horizontal = 12.dp, vertical = 6.dp)
+            ) {
+                Box(
+                    modifier = Modifier
+                        .size(8.dp)
+                        .clip(CircleShape)
+                        .background(Color(0xFF4CAF50).copy(alpha = alpha))
+                )
+                Spacer(modifier = Modifier.width(8.dp))
+                Text(
+                    text = "Tracking: ${trackingState.currentPass?.name ?: ""}",
+                    fontSize = 13.sp,
+                    fontWeight = FontWeight.Medium,
+                    color = MaterialTheme.colorScheme.onPrimaryContainer,
+                    modifier = Modifier.weight(1f)
+                )
+                val txOk = if (trackingState.txConnected) "TX" else ""
+                val rxOk = if (trackingState.rxConnected) "RX" else ""
+                Text(
+                    text = listOf(txOk, rxOk).filter { it.isNotBlank() }.joinToString("/"),
+                    fontSize = 12.sp,
+                    color = MaterialTheme.colorScheme.onPrimaryContainer
+                )
+            }
+        }
+        } // end Column
     }
 }

build-logic/convention/build.gradle.kts

@@ -24,25 +24,25 @@ group = "com.rtbishop.look4sat.build_logic.convention"
 
 gradlePlugin {
     plugins {
-        register("androidAppPlugin") {
-            id = libs.plugins.convention.androidAppPlugin.get().pluginId
-            implementationClass = "com.rtbishop.look4sat.convention.AndroidAppPlugin"
+        register("applicationPlugin") {
+            id = libs.plugins.convention.applicationPlugin.get().pluginId
+            implementationClass = "com.rtbishop.look4sat.convention.ApplicationPlugin"
         }
-        register("androidLibraryPlugin") {
-            id = libs.plugins.convention.androidLibraryPlugin.get().pluginId
-            implementationClass = "com.rtbishop.look4sat.convention.AndroidLibraryPlugin"
+        register("coreDataPlugin") {
+            id = libs.plugins.convention.coreDataPlugin.get().pluginId
+            implementationClass = "com.rtbishop.look4sat.convention.CoreDataPlugin"
         }
-        register("composeFeaturePlugin") {
-            id = libs.plugins.convention.composeFeaturePlugin.get().pluginId
-            implementationClass = "com.rtbishop.look4sat.convention.ComposeFeaturePlugin"
+        register("coreDomainPlugin") {
+            id = libs.plugins.convention.coreDomainPlugin.get().pluginId
+            implementationClass = "com.rtbishop.look4sat.convention.CoreDomainPlugin"
         }
-        register("composeLibraryPlugin") {
-            id = libs.plugins.convention.composeLibraryPlugin.get().pluginId
-            implementationClass = "com.rtbishop.look4sat.convention.ComposeLibraryPlugin"
+        register("corePresentationPlugin") {
+            id = libs.plugins.convention.corePresentationPlugin.get().pluginId
+            implementationClass = "com.rtbishop.look4sat.convention.CorePresentationPlugin"
         }
-        register("kotlinLibraryPlugin") {
-            id = libs.plugins.convention.kotlinLibraryPlugin.get().pluginId
-            implementationClass = "com.rtbishop.look4sat.convention.KotlinLibraryPlugin"
+        register("featurePlugin") {
+            id = libs.plugins.convention.featurePlugin.get().pluginId
+            implementationClass = "com.rtbishop.look4sat.convention.FeaturePlugin"
         }
     }
 }

build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/AndroidAppPlugin.kt

@@ -1,46 +0,0 @@
-/*
- * Look4Sat. Amateur radio satellite tracker and pass predictor.
- * Copyright (C) 2019-2026 Arty Bishop and contributors.
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package com.rtbishop.look4sat.convention
-
-import org.gradle.api.Plugin
-import org.gradle.api.Project
-import org.gradle.kotlin.dsl.dependencies
-
-@Suppress("Unused")
-internal class AndroidAppPlugin : Plugin<Project> {
-    override fun apply(target: Project) {
-        with(target) {
-            setupAndroidApplication()
-            setupComposeFeature()
-            setupKotlinToolchain()
-            setupAndroidTestDependencies()
-            setupTestDependencies()
-            dependencies {
-                IMPLEMENTATION(project(":core:data"))
-                IMPLEMENTATION(project(":core:domain"))
-                IMPLEMENTATION(project(":core:presentation"))
-                IMPLEMENTATION(project(":feature:map"))
-                IMPLEMENTATION(project(":feature:passes"))
-                IMPLEMENTATION(project(":feature:radar"))
-                IMPLEMENTATION(project(":feature:satellites"))
-                IMPLEMENTATION(project(":feature:settings"))
-                IMPLEMENTATION(libs.androidx.core.splashscreen)
-            }
-        }
-    }
-}

build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/ApplicationPlugin.kt

@@ -0,0 +1,44 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.convention
+
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.kotlin.dsl.dependencies
+
+@Suppress("Unused")
+internal class ApplicationPlugin : Plugin<Project> {
+    override fun apply(target: Project) = with(target) {
+        setupAndroidApp()
+        setupCompose()
+        setupKotlin()
+        dependencies {
+            implementation(project(":core:data"))
+            implementation(project(":core:domain"))
+            implementation(project(":core:presentation"))
+            implementation(project(":feature:map"))
+            implementation(project(":feature:passes"))
+            implementation(project(":feature:radar"))
+            implementation(project(":feature:radiocontrol"))
+            implementation(project(":feature:satellites"))
+            implementation(project(":feature:settings"))
+            implementation(libs.androidx.core.splashscreen)
+            androidTestImplementation(libs.bundles.androidTest)
+        }
+    }
+}

build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/CoreDataPlugin.kt

@@ -22,25 +22,19 @@ import org.gradle.api.Project
 import org.gradle.kotlin.dsl.dependencies
 
 @Suppress("Unused")
-internal class AndroidLibraryPlugin : Plugin<Project> {
-    override fun apply(target: Project) {
-        with(target) {
-            with(pluginManager) {
-                alias(libs.plugins.google.ksp)
-            }
-            setupCommonLibrary()
-            setupKotlinToolchain()
-            setupAndroidTestDependencies()
-            setupTestDependencies()
-            dependencies {
-                IMPLEMENTATION(project(":core:domain"))
-                IMPLEMENTATION(libs.androidx.core.ktx)
-                IMPLEMENTATION(libs.androidx.room.asProvider())
-                IMPLEMENTATION(libs.androidx.room.runtime)
-                KSP(libs.androidx.room.compiler)
-                IMPLEMENTATION(libs.other.coroutines)
-                IMPLEMENTATION(libs.other.okhttp)
-            }
+internal class CoreDataPlugin : Plugin<Project> {
+    override fun apply(target: Project) = with(target) {
+        applyPlugin(libs.plugins.google.ksp)
+        setupAndroidLib()
+        setupKotlin()
+        dependencies {
+            implementation(project(":core:domain"))
+            implementation(libs.androidx.core.ktx)
+            implementation(libs.androidx.room)
+            implementation(libs.androidx.room.runtime)
+            ksp(libs.androidx.room.compiler)
+            implementation(libs.other.coroutines)
+            implementation(libs.other.okhttp)
         }
     }
 }

build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/CoreDomainPlugin.kt

@@ -22,18 +22,13 @@ import org.gradle.api.Project
 import org.gradle.kotlin.dsl.dependencies
 
 @Suppress("Unused")
-internal class KotlinLibraryPlugin : Plugin<Project> {
-    override fun apply(target: Project) {
-        with(target) {
-            with(pluginManager) {
-                alias(libs.plugins.kotlin.jvm)
-            }
-            setupKotlinToolchain()
-            setupTestDependencies()
-            dependencies {
-                IMPLEMENTATION(libs.other.coroutines)
-                IMPLEMENTATION(libs.other.json)
-            }
+internal class CoreDomainPlugin : Plugin<Project> {
+    override fun apply(target: Project) = with(target) {
+        applyPlugin(libs.plugins.kotlin.jvm)
+        setupKotlin()
+        dependencies {
+            implementation(libs.other.coroutines)
+            implementation(libs.other.json)
         }
     }
 }

build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/CorePresentationPlugin.kt

@@ -22,18 +22,14 @@ import org.gradle.api.Project
 import org.gradle.kotlin.dsl.dependencies
 
 @Suppress("Unused")
-internal class ComposeFeaturePlugin : Plugin<Project> {
-    override fun apply(target: Project) {
-        with(target) {
-            setupCommonLibrary()
-            setupComposeFeature()
-            setupKotlinToolchain()
-            setupAndroidTestDependencies()
-            setupTestDependencies()
-            dependencies {
-                IMPLEMENTATION(project(":core:domain"))
-                IMPLEMENTATION(project(":core:presentation"))
-            }
+internal class CorePresentationPlugin : Plugin<Project> {
+    override fun apply(target: Project) = with(target) {
+        setupAndroidLib()
+        setupCompose()
+        setupKotlin()
+        dependencies {
+            implementation(project(":core:domain"))
+            implementation(libs.androidx.core.splashscreen)
         }
     }
 }

build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/FeaturePlugin.kt

@@ -22,18 +22,14 @@ import org.gradle.api.Project
 import org.gradle.kotlin.dsl.dependencies
 
 @Suppress("Unused")
-internal class ComposeLibraryPlugin : Plugin<Project> {
-    override fun apply(target: Project) {
-        with(target) {
-            setupCommonLibrary()
-            setupComposeFeature()
-            setupKotlinToolchain()
-            setupAndroidTestDependencies()
-            setupTestDependencies()
-            dependencies {
-                IMPLEMENTATION(project(":core:domain"))
-                IMPLEMENTATION(libs.androidx.core.splashscreen)
-            }
+internal class FeaturePlugin : Plugin<Project> {
+    override fun apply(target: Project) = with(target) {
+        setupAndroidLib()
+        setupCompose()
+        setupKotlin()
+        dependencies {
+            implementation(project(":core:domain"))
+            implementation(project(":core:presentation"))
         }
     }
 }

build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/PluginSetupUtils.kt

@@ -21,7 +21,7 @@ import com.android.build.api.dsl.ApplicationExtension
 import com.android.build.api.dsl.CommonExtension
 import org.gradle.accessors.dm.LibrariesForLibs
 import org.gradle.api.Project
-import org.gradle.api.plugins.PluginManager
+import org.gradle.api.artifacts.dsl.DependencyHandler
 import org.gradle.api.provider.Provider
 import org.gradle.kotlin.dsl.accessors.runtime.extensionOf
 import org.gradle.kotlin.dsl.configure
@@ -29,23 +29,30 @@ import org.gradle.kotlin.dsl.dependencies
 import org.gradle.plugin.use.PluginDependency
 import org.jetbrains.kotlin.gradle.dsl.kotlinExtension
 
-internal const val ANDROID_TEST_IMPLEMENTATION = "androidTestImplementation"
-internal const val DEBUG_IMPLEMENTATION = "debugImplementation"
-internal const val IMPLEMENTATION = "implementation"
-internal const val KSP = "ksp"
-internal const val TEST_IMPLEMENTATION = "testImplementation"
-
 internal val Project.libs
     get(): LibrariesForLibs = extensionOf(this, "libs") as LibrariesForLibs
 
-internal fun PluginManager.alias(notation: Provider<PluginDependency>) {
-    apply(notation.get().pluginId)
+internal fun Project.applyPlugin(notation: Provider<PluginDependency>) {
+    pluginManager.apply(notation.get().pluginId)
 }
 
-internal fun Project.setupAndroidApplication() {
-    with(pluginManager) {
-        alias(libs.plugins.android.application)
-    }
+internal fun DependencyHandler.implementation(dependencyNotation: Any) =
+    add("implementation", dependencyNotation)
+
+internal fun DependencyHandler.debugImplementation(dependencyNotation: Any) =
+    add("debugImplementation", dependencyNotation)
+
+internal fun DependencyHandler.testImplementation(dependencyNotation: Any) =
+    add("testImplementation", dependencyNotation)
+
+internal fun DependencyHandler.androidTestImplementation(dependencyNotation: Any) =
+    add("androidTestImplementation", dependencyNotation)
+
+internal fun DependencyHandler.ksp(dependencyNotation: Any) =
+    add("ksp", dependencyNotation)
+
+internal fun Project.setupAndroidApp() {
+    applyPlugin(libs.plugins.android.application)
     extensions.configure<ApplicationExtension> {
         namespace = libs.versions.packageName.get()
         compileSdk = libs.versions.compileSdk.get().toInt()
@@ -55,9 +62,6 @@ internal fun Project.setupAndroidApplication() {
             versionCode = libs.versions.appVersionCode.get().toInt()
             versionName = libs.versions.appVersionName.get()
         }
-        buildFeatures {
-            compose = true
-        }
         buildTypes {
             debug {
                 applicationIdSuffix = ".debug"
@@ -76,43 +80,32 @@ internal fun Project.setupAndroidApplication() {
     }
 }
 
-internal fun Project.setupCommonLibrary() {
-    with(pluginManager) {
-        alias(libs.plugins.android.library)
-    }
+internal fun Project.setupAndroidLib() {
+    applyPlugin(libs.plugins.android.library)
     extensions.configure<CommonExtension> {
         compileSdk = libs.versions.compileSdk.get().toInt()
         defaultConfig.minSdk = libs.versions.minSdk.get().toInt()
     }
+    dependencies {
+        androidTestImplementation(libs.bundles.androidTest)
+    }
 }
 
-internal fun Project.setupComposeFeature() {
-    with(pluginManager) {
-        alias(libs.plugins.compose.compiler)
-    }
+internal fun Project.setupCompose() {
+    applyPlugin(libs.plugins.compose.compiler)
     extensions.configure<CommonExtension> {
         buildFeatures.compose = true
     }
     dependencies {
-        IMPLEMENTATION(platform(libs.compose.bom))
-        IMPLEMENTATION(libs.bundles.composeAll)
-        DEBUG_IMPLEMENTATION(libs.bundles.composeDebug)
+        implementation(platform(libs.compose.bom))
+        implementation(libs.bundles.composeAll)
+        debugImplementation(libs.bundles.composeDebug)
     }
 }
 
-internal fun Project.setupKotlinToolchain() {
+internal fun Project.setupKotlin() {
     kotlinExtension.jvmToolchain(libs.versions.jdkVersion.get().toInt())
-}
-
-internal fun Project.setupAndroidTestDependencies() {
     dependencies {
-        ANDROID_TEST_IMPLEMENTATION(libs.bundles.androidTest)
-    }
-}
-
-internal fun Project.setupTestDependencies() {
-    dependencies {
-        TEST_IMPLEMENTATION(libs.test.coroutines)
-        TEST_IMPLEMENTATION(libs.test.junit4)
+        testImplementation(libs.bundles.unitTest)
     }
 }

core/data/build.gradle.kts

@@ -1,5 +1,5 @@
 plugins {
-    alias(libs.plugins.convention.androidLibraryPlugin)
+    alias(libs.plugins.convention.coreDataPlugin)
 }
 
 android {

core/data/src/main/java/com/rtbishop/look4sat/core/data/framework/BluetoothReporter.kt

@@ -20,121 +20,112 @@ package com.rtbishop.look4sat.core.data.framework
 import android.bluetooth.BluetoothManager
 import android.bluetooth.BluetoothSocket
 import android.util.Log
-import com.rtbishop.look4sat.core.domain.repository.BtService
-import com.rtbishop.look4sat.core.domain.repository.IReporterRepo
-import com.rtbishop.look4sat.core.domain.repository.WithoutExtParams
+import com.rtbishop.look4sat.core.domain.repository.IReporter
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Job
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import java.io.OutputStream
 import java.util.UUID
-import kotlin.math.abs
-
-data class DeviceConnection(
-    var socket: BluetoothSocket? = null,
-    var outputStream: OutputStream? = null,
-    var connected: Boolean = false,
-    var connecting: Boolean = false,
-    var connectionJob: Job? = null
-)
 
 class BluetoothReporter(
     private val bluetoothManager: BluetoothManager,
-    private val reporterScope: CoroutineScope
-) : IReporterRepo<WithoutExtParams> {
+    private val reporterScope: CoroutineScope,
+    private val rotatorDeviceId: String,
+    private val frequencyDeviceId: String
+) : IReporter {
 
     private val tag = "BTReporter"
-    private val sppid: UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb")
-
-    private val serviceToDevice = mutableMapOf<BtService, String>()
-    private val deviceConnections = mutableMapOf<String, DeviceConnection>()
+    private val sppId: UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb")
     private val writeMutex = Mutex()
 
-    override fun isConnected(service: BtService): Boolean {
-        val deviceId = serviceToDevice[service] ?: return false
-        return deviceConnections[deviceId]?.connected == true
-    }
+    private var rotatorSocket: BluetoothSocket? = null
+    private var rotatorStream: OutputStream? = null
+    private var rotatorConnected = false
+    private var rotatorConnecting = false
 
-    override fun isConnecting(service: BtService): Boolean {
-        val deviceId = serviceToDevice[service] ?: return false
-        return deviceConnections[deviceId]?.connecting == true
-    }
+    private var frequencySocket: BluetoothSocket? = null
+    private var frequencyStream: OutputStream? = null
+    private var frequencyConnected = false
+    private var frequencyConnecting = false
 
-    override fun connect(service: BtService, deviceId: String) {
-        serviceToDevice[service] = deviceId
-        val connection = deviceConnections.getOrPut(deviceId) {
-            DeviceConnection()
+    override fun reportRotation(format: String, azimuth: Double, elevation: Double) {
+        reporterScope.launch {
+            ensureRotatorConnected()
+            if (!rotatorConnected) return@launch
+            val el = if (elevation > 0.0) elevation else 0.0
+            val command = format
+                .replace($$"$AZ", azimuth.toString())
+                .replace($$"$EL", el.toString())
+                .unescapeControlChars()
+            write(rotatorStream, command) { rotatorConnected = false }
         }
-        if (connection.connected || connection.connecting) return
-        connection.connectionJob = reporterScope.launch {
+    }
+
+    override fun reportFrequency(format: String, frequency: Long) {
+        reporterScope.launch {
+            ensureFrequencyConnected()
+            if (!frequencyConnected) return@launch
+            val command = format
+                .replace($$"$FREQ", frequency.toString())
+                .unescapeControlChars()
+            write(frequencyStream, command) { frequencyConnected = false }
+        }
+    }
+
+    private fun ensureRotatorConnected() {
+        if (rotatorConnected || rotatorConnecting || rotatorDeviceId.isBlank()) return
+        reporterScope.launch {
             try {
-                connection.connecting = true
-                val device = bluetoothManager.adapter.getRemoteDevice(deviceId)
-                val socket = device.createInsecureRfcommSocketToServiceRecord(sppid)
+                rotatorConnecting = true
+                val device = bluetoothManager.adapter.getRemoteDevice(rotatorDeviceId)
+                val socket = device.createInsecureRfcommSocketToServiceRecord(sppId)
                 socket.connect()
-                connection.socket = socket
-                connection.outputStream = socket.outputStream
-                connection.connected = true
-                Log.i(tag, "$tag: Connected to $deviceId")
+                rotatorSocket = socket
+                rotatorStream = socket.outputStream
+                rotatorConnected = true
+                Log.i(tag, "Rotator connected to $rotatorDeviceId")
             } catch (e: Exception) {
-                Log.e(tag, "$tag: ${e.message}")
-                connection.connected = false
+                Log.e(tag, "Rotator connect error: ${e.message}")
+                rotatorConnected = false
             } finally {
-                connection.connecting = false
+                rotatorConnecting = false
             }
         }
     }
 
-    private suspend fun write(service: BtService, buffer: String) {
-        val deviceId = serviceToDevice[service] ?: return
-        val connection = deviceConnections[deviceId] ?: return
-        if (!connection.connected) return
+    private fun ensureFrequencyConnected() {
+        if (frequencyConnected || frequencyConnecting || frequencyDeviceId.isBlank()) return
+        reporterScope.launch {
+            try {
+                frequencyConnecting = true
+                val device = bluetoothManager.adapter.getRemoteDevice(frequencyDeviceId)
+                val socket = device.createInsecureRfcommSocketToServiceRecord(sppId)
+                socket.connect()
+                frequencySocket = socket
+                frequencyStream = socket.outputStream
+                frequencyConnected = true
+                Log.i(tag, "Frequency connected to $frequencyDeviceId")
+            } catch (e: Exception) {
+                Log.e(tag, "Frequency connect error: ${e.message}")
+                frequencyConnected = false
+            } finally {
+                frequencyConnecting = false
+            }
+        }
+    }
+
+    private suspend fun write(stream: OutputStream?, data: String, onError: () -> Unit) {
         try {
             writeMutex.withLock {
-                connection.outputStream?.write(buffer.toByteArray())
+                stream?.write(data.toByteArray())
             }
         } catch (e: Exception) {
-            Log.e(tag, "$tag: Write failed ${e.message}")
-            connection.connected = false
+            Log.e(tag, "Write error: ${e.message}")
+            onError()
         }
     }
 
-    override fun reportRotation(format: String, azimuth: Double, elevation: Double, params: WithoutExtParams) {
-        reporterScope.launch {
-            if (!isConnected(BtService.ROTATOR)) return@launch
-            val newElevation = if (elevation > 0.0) elevation else 0.0
-            val azimuthString = intToStringWithLeadingZeroes(azimuth.toInt())
-            val elevationString = intToStringWithLeadingZeroes(newElevation.toInt())
-            val buffer = format
-                .replace($$"$AZ", azimuthString)
-                .replace($$"$EL", elevationString)
-                .replace("\\r", "\r")
-                .replace("\\n", "\n")
-                .replace("\\t", "\t")
-            write(BtService.ROTATOR, buffer)
-        }
-    }
-
-    override fun reportFrequency(format: String, frequency: Long, params: WithoutExtParams) {
-        reporterScope.launch {
-            if (!isConnected(BtService.FREQUENCY)) return@launch
-            val buffer = format
-                .replace($$"$FREQ", frequency.toString())
-                .replace("\\r", "\r")
-                .replace("\\n", "\n")
-                .replace("\\t", "\t")
-            write(BtService.FREQUENCY, buffer)
-        }
-    }
-
-    private fun intToStringWithLeadingZeroes(value: Int): String {
-        return if (value > 0) {
-            if (value < 10) "00$value" else if (value < 100) "0$value" else "$value"
-        } else {
-            val absValue = abs(value)
-            if (value > -10) "-00$absValue" else if (value > -100) "-0$absValue" else "-$absValue"
-        }
-    }
+    private fun String.unescapeControlChars(): String =
+        replace("\\r", "\r").replace("\\n", "\n").replace("\\t", "\t")
 }

core/data/src/main/java/com/rtbishop/look4sat/core/data/framework/Ft817CatProtocol.kt

@@ -0,0 +1,136 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.core.data.framework
+
+object Ft817CatProtocol {
+
+    const val CMD_SET_FREQ: Byte = 0x01
+    const val CMD_READ_FREQ_MODE: Byte = 0x03
+    const val CMD_SET_MODE: Byte = 0x07
+    const val CMD_PTT_ON: Byte = 0x08
+    const val CMD_PTT_OFF: Byte = 0x88.toByte()
+    const val CMD_CTCSS_MODE: Byte = 0x0A
+    const val CMD_CTCSS_TONE: Byte = 0x0B
+
+    const val CTCSS_ENC_ON: Byte = 0x2A
+    const val CTCSS_OFF: Byte = 0x8A.toByte()
+
+    val MODE_TO_BYTE: Map<String, Byte> = mapOf(
+        "LSB" to 0x00,
+        "USB" to 0x01,
+        "CW" to 0x02,
+        "CW-R" to 0x03,
+        "AM" to 0x04,
+        "FM" to 0x08,
+        "DIG" to 0x0A,
+        "PKT" to 0x0C
+    )
+
+    val BYTE_TO_MODE: Map<Byte, String> = MODE_TO_BYTE.entries.associate { it.value to it.key }
+
+    /**
+     * Encode frequency in Hz to 4-byte BCD with 10 Hz resolution.
+     * Example: 145500000 Hz → [0x14, 0x55, 0x00, 0x00]
+     */
+    fun encodeFrequencyBcd(frequencyHz: Long): ByteArray {
+        val freq10Hz = frequencyHz / 10
+        val bcd = ByteArray(4)
+        val digits = String.format("%08d", freq10Hz)
+        for (i in 0 until 4) {
+            val high = digits[i * 2] - '0'
+            val low = digits[i * 2 + 1] - '0'
+            bcd[i] = ((high shl 4) or low).toByte()
+        }
+        return bcd
+    }
+
+    /**
+     * Decode 4-byte BCD frequency to Hz.
+     */
+    fun decodeFrequencyBcd(bcd: ByteArray): Long {
+        var freq10Hz = 0L
+        for (i in 0 until 4) {
+            val b = bcd[i].toInt() and 0xFF
+            val high = b shr 4
+            val low = b and 0x0F
+            freq10Hz = freq10Hz * 100 + high * 10 + low
+        }
+        return freq10Hz * 10
+    }
+
+    /**
+     * Encode CTCSS tone frequency (in Hz, e.g. 67.0) to 2-byte BCD.
+     * 67.0 Hz → 670 (in 0.1 Hz) → BCD [0x06, 0x70]
+     */
+    fun encodeCtcssToneBcd(toneHz: Double): ByteArray {
+        val tone01Hz = (toneHz * 10).toLong()
+        val digits = String.format("%04d", tone01Hz)
+        val bcd = ByteArray(2)
+        for (i in 0 until 2) {
+            val high = digits[i * 2] - '0'
+            val low = digits[i * 2 + 1] - '0'
+            bcd[i] = ((high shl 4) or low).toByte()
+        }
+        return bcd
+    }
+
+    fun buildSetFreqCommand(frequencyHz: Long): ByteArray {
+        val bcd = encodeFrequencyBcd(frequencyHz)
+        return byteArrayOf(bcd[0], bcd[1], bcd[2], bcd[3], CMD_SET_FREQ)
+    }
+
+    fun buildSetModeCommand(mode: String): ByteArray? {
+        val modeByte = MODE_TO_BYTE[mode.uppercase()] ?: return null
+        return byteArrayOf(modeByte, 0x00, 0x00, 0x00, CMD_SET_MODE)
+    }
+
+    fun buildReadFreqModeCommand(): ByteArray {
+        return byteArrayOf(0x00, 0x00, 0x00, 0x00, CMD_READ_FREQ_MODE)
+    }
+
+    fun buildPttOnCommand(): ByteArray {
+        return byteArrayOf(0x00, 0x00, 0x00, 0x00, CMD_PTT_ON)
+    }
+
+    fun buildPttOffCommand(): ByteArray {
+        return byteArrayOf(0x00, 0x00, 0x00, 0x00, CMD_PTT_OFF)
+    }
+
+    fun buildCtcssModeCommand(enabled: Boolean): ByteArray {
+        val sub = if (enabled) CTCSS_ENC_ON else CTCSS_OFF
+        return byteArrayOf(sub, 0x00, 0x00, 0x00, CMD_CTCSS_MODE)
+    }
+
+    fun buildSetCtcssToneCommand(toneHz: Double): ByteArray {
+        val bcd = encodeCtcssToneBcd(toneHz)
+        return byteArrayOf(bcd[0], bcd[1], 0x00, 0x00, CMD_CTCSS_TONE)
+    }
+
+    /**
+     * Parse the 5-byte response from a READ FREQ+MODE command.
+     * Returns (frequencyHz, modeString) or null if parsing fails.
+     */
+    fun parseReadResponse(response: ByteArray): Pair<Long, String>? {
+        if (response.size < 5) return null
+        val freqBcd = response.copyOfRange(0, 4)
+        val frequencyHz = decodeFrequencyBcd(freqBcd)
+        val modeByte = response[4]
+        val mode = BYTE_TO_MODE[modeByte] ?: return null
+        return Pair(frequencyHz, mode)
+    }
+}

core/data/src/main/java/com/rtbishop/look4sat/core/data/framework/Ft817Controller.kt

@@ -0,0 +1,170 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.core.data.framework
+
+import android.bluetooth.BluetoothManager
+import android.bluetooth.BluetoothSocket
+import android.util.Log
+import com.rtbishop.look4sat.core.domain.repository.IRadioController
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import kotlinx.coroutines.withContext
+import java.io.InputStream
+import java.io.OutputStream
+import java.util.UUID
+
+class Ft817Controller(
+    private val bluetoothManager: BluetoothManager,
+    private val deviceAddress: String
+) : IRadioController {
+
+    private val tag = "FT817"
+    private val sppId: UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb")
+    private val ioMutex = Mutex()
+    private val commandDelayMs = 200L
+
+    private var socket: BluetoothSocket? = null
+    private var outputStream: OutputStream? = null
+    private var inputStream: InputStream? = null
+
+    override var isConnected: Boolean = false
+        private set
+
+    override suspend fun connect(): Boolean = withContext(Dispatchers.IO) {
+        if (isConnected) return@withContext true
+        if (deviceAddress.isBlank()) return@withContext false
+        try {
+            val device = bluetoothManager.adapter.getRemoteDevice(deviceAddress)
+            val btSocket = device.createInsecureRfcommSocketToServiceRecord(sppId)
+            btSocket.connect()
+            socket = btSocket
+            outputStream = btSocket.outputStream
+            inputStream = btSocket.inputStream
+            isConnected = true
+            Log.i(tag, "Connected to $deviceAddress")
+            true
+        } catch (e: Exception) {
+            Log.e(tag, "Connect error: ${e.message}")
+            isConnected = false
+            false
+        }
+    }
+
+    override suspend fun disconnect() {
+        withContext(Dispatchers.IO) {
+            try {
+                inputStream?.close()
+                outputStream?.close()
+                socket?.close()
+            } catch (e: Exception) {
+                Log.e(tag, "Disconnect error: ${e.message}")
+            } finally {
+                inputStream = null
+                outputStream = null
+                socket = null
+                isConnected = false
+                Log.i(tag, "Disconnected from $deviceAddress")
+            }
+        }
+    }
+
+    override suspend fun setFrequency(frequencyHz: Long): Boolean = withContext(Dispatchers.IO) {
+        ioMutex.withLock {
+            sendCommandWithAck(Ft817CatProtocol.buildSetFreqCommand(frequencyHz))
+        }
+    }
+
+    override suspend fun setMode(mode: String): Boolean = withContext(Dispatchers.IO) {
+        val cmd = Ft817CatProtocol.buildSetModeCommand(mode) ?: return@withContext false
+        ioMutex.withLock { sendCommandWithAck(cmd) }
+    }
+
+    override suspend fun setCtcssMode(enabled: Boolean): Boolean = withContext(Dispatchers.IO) {
+        ioMutex.withLock {
+            sendCommandWithAck(Ft817CatProtocol.buildCtcssModeCommand(enabled))
+        }
+    }
+
+    override suspend fun setCtcssTone(toneHz: Double): Boolean = withContext(Dispatchers.IO) {
+        ioMutex.withLock {
+            sendCommandWithAck(Ft817CatProtocol.buildSetCtcssToneCommand(toneHz))
+        }
+    }
+
+    override suspend fun readFrequencyAndMode(): Pair<Long, String>? = withContext(Dispatchers.IO) {
+        ioMutex.withLock {
+            val sent = sendCommand(Ft817CatProtocol.buildReadFreqModeCommand())
+            if (!sent) return@withContext null
+            delay(commandDelayMs)
+            val response = readResponse(5) ?: return@withContext null
+            Ft817CatProtocol.parseReadResponse(response)
+        }
+    }
+
+    override suspend fun pttOn(): Boolean = withContext(Dispatchers.IO) {
+        ioMutex.withLock { sendCommandWithAck(Ft817CatProtocol.buildPttOnCommand()) }
+    }
+
+    override suspend fun pttOff(): Boolean = withContext(Dispatchers.IO) {
+        ioMutex.withLock { sendCommandWithAck(Ft817CatProtocol.buildPttOffCommand()) }
+    }
+
+    private suspend fun sendCommand(bytes: ByteArray): Boolean {
+        return try {
+            outputStream?.write(bytes) ?: return false
+            outputStream?.flush()
+            delay(commandDelayMs)
+            true
+        } catch (e: Exception) {
+            Log.e(tag, "Send error: ${e.message}")
+            isConnected = false
+            false
+        }
+    }
+
+    /** Send command and read the 1-byte ACK response (0x00 = OK). */
+    private suspend fun sendCommandWithAck(bytes: ByteArray): Boolean {
+        if (!sendCommand(bytes)) return false
+        return try {
+            val ack = inputStream?.read() ?: return false
+            ack == 0x00
+        } catch (e: Exception) {
+            Log.e(tag, "ACK read error: ${e.message}")
+            true // command was sent, ACK read failed - continue anyway
+        }
+    }
+
+    private fun readResponse(length: Int): ByteArray? {
+        return try {
+            val buffer = ByteArray(length)
+            var read = 0
+            while (read < length) {
+                val count = inputStream?.read(buffer, read, length - read) ?: return null
+                if (count < 0) return null
+                read += count
+            }
+            buffer
+        } catch (e: Exception) {
+            Log.e(tag, "Read error: ${e.message}")
+            isConnected = false
+            null
+        }
+    }
+}

core/data/src/main/java/com/rtbishop/look4sat/core/data/framework/NetworkReporter.kt

@@ -17,11 +17,8 @@
  */
 package com.rtbishop.look4sat.core.data.framework
 
-import com.rtbishop.look4sat.core.domain.repository.BtService
-import com.rtbishop.look4sat.core.domain.repository.ExtendedParams
-import com.rtbishop.look4sat.core.domain.repository.IReporterRepo
+import com.rtbishop.look4sat.core.domain.repository.IReporter
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Job
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
@@ -29,89 +26,94 @@ import java.net.InetSocketAddress
 import java.nio.ByteBuffer
 import java.nio.channels.SocketChannel
 
-enum class NetworkService { ROTATOR, FREQUENCY }
+class NetworkReporter(
+    private val reporterScope: CoroutineScope,
+    private val rotatorServer: String,
+    private val rotatorPort: Int,
+    private val frequencyServer: String,
+    private val frequencyPort: Int
+) : IReporter {
 
-data class SocketConnection(
-    var socket: SocketChannel? = null,
-    var connected: Boolean = false,
-    var connecting: Boolean = false,
-    var connectionJob: Job? = null
-)
-
-class NetworkReporter(private val reporterScope: CoroutineScope) : IReporterRepo<ExtendedParams> {
-    private val serviceToAddress = mutableMapOf<NetworkService, String>()
-    private val connections = mutableMapOf<String, SocketConnection>()
     private val writeMutex = Mutex()
 
-    fun isConnected(service: NetworkService): Boolean {
-        val addr = serviceToAddress[service] ?: return false
-        return connections[addr]?.connected == true
+    private var rotatorSocket: SocketChannel? = null
+    private var rotatorConnected = false
+    private var rotatorConnecting = false
+
+    private var frequencySocket: SocketChannel? = null
+    private var frequencyConnected = false
+    private var frequencyConnecting = false
+
+    override fun reportRotation(format: String, azimuth: Double, elevation: Double) {
+        reporterScope.launch {
+            ensureRotatorConnected()
+            if (!rotatorConnected) return@launch
+            val el = if (elevation > 0.0) elevation else 0.0
+            val command = format
+                .replace($$"$AZ", azimuth.toString())
+                .replace($$"$EL", el.toString())
+                .unescapeControlChars()
+            write(rotatorSocket, command) { rotatorConnected = false }
+        }
     }
 
-    private fun getOrCreateConnection(addr: String): SocketConnection {
-        return connections.getOrPut(addr) { SocketConnection() }
+    override fun reportFrequency(format: String, frequency: Long) {
+        reporterScope.launch {
+            ensureFrequencyConnected()
+            if (!frequencyConnected) return@launch
+            val command = format
+                .replace($$"$FREQ", frequency.toString())
+                .unescapeControlChars()
+            write(frequencySocket, command) { frequencyConnected = false }
+        }
     }
 
-    fun connect(service: NetworkService, server: String, port: Int) {
-        val addr = "$server:$port"
-        serviceToAddress[service] = addr
-        val connection = getOrCreateConnection(addr)
-        if (connection.connected || connection.connecting) return
-        connection.connectionJob = reporterScope.launch {
+    private fun ensureRotatorConnected() {
+        if (rotatorConnected || rotatorConnecting || rotatorServer.isBlank()) return
+        reporterScope.launch {
             try {
-                connection.connecting = true
-                val socket = SocketChannel.open(InetSocketAddress(server, port))
-                connection.socket = socket
-                connection.connected = true
-                println("NetworkReporter: $service connected to $addr")
+                rotatorConnecting = true
+                rotatorSocket = SocketChannel.open(InetSocketAddress(rotatorServer, rotatorPort))
+                rotatorConnected = true
+                println("NetworkReporter: Rotator connected to $rotatorServer:$rotatorPort")
             } catch (e: Exception) {
-                println("NetworkReporter connect error: ${e.message}")
-                connection.connected = false
+                println("NetworkReporter rotator connect error: ${e.message}")
+                rotatorConnected = false
             } finally {
-                connection.connecting = false
+                rotatorConnecting = false
             }
         }
     }
 
-    private suspend fun write(service: NetworkService, command: String) {
-        val addr = serviceToAddress[service] ?: return
-        val connection = connections[addr] ?: return
-        if (!connection.connected) return
+    private fun ensureFrequencyConnected() {
+        if (frequencyConnected || frequencyConnecting || frequencyServer.isBlank()) return
+        reporterScope.launch {
+            try {
+                frequencyConnecting = true
+                frequencySocket = SocketChannel.open(InetSocketAddress(frequencyServer, frequencyPort))
+                frequencyConnected = true
+                println("NetworkReporter: Frequency connected to $frequencyServer:$frequencyPort")
+            } catch (e: Exception) {
+                println("NetworkReporter frequency connect error: ${e.message}")
+                frequencyConnected = false
+            } finally {
+                frequencyConnecting = false
+            }
+        }
+    }
+
+    private suspend fun write(socket: SocketChannel?, command: String, onError: () -> Unit) {
         try {
             writeMutex.withLock {
-                val buffer = ByteBuffer.wrap("\\$command\n".toByteArray())
-                connection.socket?.write(buffer)
+                val buffer = ByteBuffer.wrap("$command\n".toByteArray())
+                socket?.write(buffer)
             }
         } catch (e: Exception) {
             println("NetworkReporter write error: ${e.message}")
-            connection.connected = false
+            onError()
         }
     }
 
-    override fun isConnected(service: BtService): Boolean = false
-
-    override fun isConnecting(service: BtService): Boolean = false
-
-    override fun connect(service: BtService, deviceId: String) {}
-
-    override fun reportRotation(format: String, azimuth: Double, elevation: Double, params: ExtendedParams) {
-        reporterScope.launch {
-            connect(NetworkService.ROTATOR, params.server, params.port)
-            if (!isConnected(NetworkService.ROTATOR)) return@launch
-            val el = if (elevation > 0.0) elevation else 0.0
-            val command = format
-                .replace("\$AZ", azimuth.toString())
-                .replace("\$EL", el.toString())
-            write(NetworkService.ROTATOR, command)
-        }
-    }
-
-    override fun reportFrequency(format: String, frequency: Long, params: ExtendedParams) {
-        reporterScope.launch {
-            connect(NetworkService.FREQUENCY, params.server, params.port)
-            if (!isConnected(NetworkService.FREQUENCY)) return@launch
-            val command = format.replace("\$FREQ", frequency.toString())
-            write(NetworkService.FREQUENCY, command)
-        }
-    }
+    private fun String.unescapeControlChars(): String =
+        replace("\\r", "\r").replace("\\n", "\n").replace("\\t", "\t")
 }

core/data/src/main/java/com/rtbishop/look4sat/core/data/framework/RadioTrackingService.kt

@@ -0,0 +1,357 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.core.data.framework
+
+import android.bluetooth.BluetoothManager
+import android.util.Log
+import com.rtbishop.look4sat.core.domain.model.SatRadio
+import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
+import com.rtbishop.look4sat.core.domain.repository.IRadioController
+import com.rtbishop.look4sat.core.domain.repository.IRadioTrackingService
+import com.rtbishop.look4sat.core.domain.repository.ISatelliteRepo
+import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
+import com.rtbishop.look4sat.core.domain.repository.RadioTrackingState
+import com.rtbishop.look4sat.core.domain.utility.TransponderMapper
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
+
+class RadioTrackingService(
+    private val appScope: CoroutineScope,
+    private val bluetoothManager: BluetoothManager,
+    private val satelliteRepo: ISatelliteRepo,
+    private val settingsRepo: ISettingsRepo
+) : IRadioTrackingService {
+
+    private val tag = "RadioTracking"
+    private val _state = MutableStateFlow(RadioTrackingState())
+    override val state: StateFlow<RadioTrackingState> = _state
+
+    private var txController: IRadioController? = null
+    private var rxController: IRadioController? = null
+    private var trackingJob: Job? = null
+
+    override suspend fun connectRadios() {
+        // Disconnect old controllers if any
+        txController?.disconnect()
+        rxController?.disconnect()
+
+        // Read current addresses from settings
+        val rcSettings = settingsRepo.radioControlSettings.value
+        val txAddr = rcSettings.txRadioAddress
+        val rxAddr = rcSettings.rxRadioAddress
+
+        Log.i(tag, "Connecting TX=$txAddr RX=$rxAddr")
+
+        if (txAddr.isBlank() && rxAddr.isBlank()) {
+            _state.update { it.copy(errorMessage = "No radio addresses configured. Set them in Settings → FT-817.") }
+            return
+        }
+
+        val tx = Ft817Controller(bluetoothManager, txAddr)
+        val rx = Ft817Controller(bluetoothManager, rxAddr)
+        txController = tx
+        rxController = rx
+
+        _state.update { it.copy(errorMessage = null) }
+        val txOk = if (txAddr.isNotBlank()) tx.connect() else false
+        val rxOk = if (rxAddr.isNotBlank()) rx.connect() else false
+        _state.update {
+            it.copy(
+                txConnected = txOk,
+                rxConnected = rxOk,
+                errorMessage = when {
+                    !txOk && !rxOk -> "Could not connect to TX and RX radios"
+                    !txOk -> "Could not connect to TX radio ($txAddr)"
+                    !rxOk -> "Could not connect to RX radio ($rxAddr)"
+                    else -> null
+                }
+            )
+        }
+    }
+
+    override suspend fun disconnectRadios() {
+        stopTracking()
+        txController?.disconnect()
+        rxController?.disconnect()
+        txController = null
+        rxController = null
+        _state.update {
+            it.copy(
+                txConnected = false,
+                rxConnected = false,
+                isActive = false
+            )
+        }
+    }
+
+    override fun startTracking(pass: OrbitalPass, transponder: SatRadio, txBaseFreqHz: Long?) {
+        _state.update {
+            it.copy(
+                isActive = true,
+                currentPass = pass,
+                selectedTransponder = transponder,
+                txBaseFrequencyHz = txBaseFreqHz
+            )
+        }
+        trackingJob?.cancel()
+        trackingJob = appScope.launch {
+            // Set modes on both radios at tracking start
+            val tx = txController
+            val rx = rxController
+            val txMode = transponder.uplinkMode
+            val rxMode = transponder.downlinkMode
+                ?: transponder.uplinkMode?.let {
+                    TransponderMapper.mapUplinkModeToDownlinkMode(it, transponder.isInverted)
+                }
+            if (tx != null && tx.isConnected && txMode != null) {
+                tx.setMode(txMode)
+                Log.i(tag, "TX mode set to $txMode")
+            }
+            if (rx != null && rx.isConnected && rxMode != null) {
+                rx.setMode(rxMode)
+                Log.i(tag, "RX mode set to $rxMode")
+            }
+            // Set CTCSS if FM
+            if (txMode?.uppercase() == "FM") {
+                _state.value.ctcssTone?.let { tone ->
+                    tx?.setCtcssTone(tone)
+                    tx?.setCtcssMode(true)
+                }
+            }
+            _state.update { it.copy(txMode = txMode, rxMode = rxMode) }
+
+            var lastSetTxFreq = 0.0
+            var lastSetRxFreq = 0.0
+            var tuningRadio = "" // "", "tx", or "rx" - which radio the user is tuning
+            var lastReadFreq = 0L
+            var stableCount = 0
+
+            while (isActive) {
+                val currentState = _state.value
+                if (!currentState.isActive) break
+
+                val satPass = currentState.currentPass ?: break
+                val xpdr = currentState.selectedTransponder ?: break
+                var txBaseFreq = currentState.txBaseFrequencyHz
+                val stationPos = settingsRepo.stationPosition.value
+                val timeNow = System.currentTimeMillis()
+
+                val pos = satelliteRepo.getPosition(satPass.orbitalObject, stationPos, timeNow)
+                val tx = txController
+                val rx = rxController
+                val hasUplink = txBaseFreq != null
+                val c = com.rtbishop.look4sat.core.domain.predict.SPEED_OF_LIGHT
+                val v = pos.distanceRate * 1000.0
+
+                if (tuningRadio.isNotEmpty()) {
+                    // --- User is tuning: keep reading, wait for stabilization ---
+                    val radio = if (tuningRadio == "tx") tx else rx
+                    if (radio != null && radio.isConnected) {
+                        val readResult = radio.readFrequencyAndMode()
+                        if (readResult != null) {
+                            val (freq, _) = readResult
+                            if (kotlin.math.abs(freq - lastReadFreq) <= 20) {
+                                stableCount++
+                            } else {
+                                stableCount = 0
+                                lastReadFreq = freq
+                            }
+                            // Stable for 2 reads → user stopped turning
+                            if (stableCount >= 2) {
+                                if (tuningRadio == "tx" && txBaseFreq != null) {
+                                    val newBase = (freq.toDouble() * c / (c + v)).toLong()
+                                    if (newBase > 0) {
+                                        txBaseFreq = newBase
+                                        _state.update { it.copy(txBaseFrequencyHz = newBase) }
+                                        Log.i(tag, "TX tuning done → base=$newBase")
+                                    }
+                                } else if (tuningRadio == "rx") {
+                                    val rxNominal = (freq.toDouble() * c / (c - v)).toLong()
+                                    val newTxBase = TransponderMapper.mapDownlinkToUplink(rxNominal, xpdr)
+                                    if (newTxBase != null && newTxBase > 0) {
+                                        txBaseFreq = newTxBase
+                                        _state.update { it.copy(txBaseFrequencyHz = newTxBase) }
+                                        Log.i(tag, "RX tuning done → txBase=$newTxBase")
+                                    }
+                                }
+                                tuningRadio = ""
+                                stableCount = 0
+                                lastSetTxFreq = 0.0
+                                lastSetRxFreq = 0.0
+                            }
+                        }
+                    }
+                } else {
+                    // --- Normal tracking: read, detect changes, command ---
+
+                    // TX dial feedback
+                    if (hasUplink && tx != null && tx.isConnected && lastSetTxFreq > 0.0) {
+                        val readResult = tx.readFrequencyAndMode()
+                        if (readResult != null) {
+                            val (actualTxFreq, _) = readResult
+                            if (kotlin.math.abs(actualTxFreq - lastSetTxFreq) >= 20.0) {
+                                tuningRadio = "tx"
+                                lastReadFreq = actualTxFreq
+                                stableCount = 0
+                                Log.i(tag, "TX tuning detected (read=$actualTxFreq, lastSet=$lastSetTxFreq)")
+                            }
+                        }
+                    }
+
+                    // RX dial feedback (only if TX not tuning)
+                    if (tuningRadio.isEmpty() && rx != null && rx.isConnected && lastSetRxFreq > 0.0) {
+                        val readResult = rx.readFrequencyAndMode()
+                        if (readResult != null) {
+                            val (actualRxFreq, _) = readResult
+                            if (kotlin.math.abs(actualRxFreq - lastSetRxFreq) >= 20.0) {
+                                tuningRadio = "rx"
+                                lastReadFreq = actualRxFreq
+                                stableCount = 0
+                                Log.i(tag, "RX tuning detected (read=$actualRxFreq, lastSet=$lastSetRxFreq)")
+                            }
+                        }
+                    }
+                }
+
+                // Compute Doppler-corrected frequencies
+                val txRadioFreq = txBaseFreq?.let { pos.getUplinkFreq(it) }
+                val rxBaseFreq = if (txBaseFreq != null) {
+                    TransponderMapper.mapUplinkToDownlink(txBaseFreq, xpdr)
+                } else {
+                    xpdr.downlinkLow
+                }
+                val rxRadioFreq = rxBaseFreq?.let { pos.getDownlinkFreq(it) }
+
+                // Command radios (only when not tuning)
+                if (tuningRadio.isEmpty()) {
+                    if (tx != null && tx.isConnected && txRadioFreq != null) {
+                        tx.setFrequency(txRadioFreq)
+                        lastSetTxFreq = txRadioFreq.toDouble()
+                    }
+                    if (rx != null && rx.isConnected && rxRadioFreq != null) {
+                        rx.setFrequency(rxRadioFreq)
+                        lastSetRxFreq = rxRadioFreq.toDouble()
+                    }
+                }
+
+                _state.update {
+                    it.copy(
+                        txConnected = tx?.isConnected ?: false,
+                        rxConnected = rx?.isConnected ?: false,
+                        txFrequencyHz = txRadioFreq,
+                        rxFrequencyHz = rxRadioFreq,
+                        azimuth = Math.toDegrees(pos.azimuth),
+                        elevation = Math.toDegrees(pos.elevation),
+                        distance = pos.distance
+                    )
+                }
+
+                delay(1000)
+            }
+        }
+    }
+
+    override fun stopTracking() {
+        trackingJob?.cancel()
+        trackingJob = null
+        _state.update { it.copy(isActive = false) }
+    }
+
+    override fun setTransponder(transponder: SatRadio) {
+        appScope.launch {
+            val tx = txController
+            val rx = rxController
+            transponder.uplinkMode?.let { tx?.setMode(it) }
+            val rxMode = transponder.downlinkMode
+                ?: transponder.uplinkMode?.let {
+                    TransponderMapper.mapUplinkModeToDownlinkMode(it, transponder.isInverted)
+                }
+            rxMode?.let { rx?.setMode(it) }
+
+            if (transponder.uplinkMode?.uppercase() == "FM") {
+                _state.value.ctcssTone?.let { tone ->
+                    tx?.setCtcssTone(tone)
+                    tx?.setCtcssMode(true)
+                }
+            }
+        }
+        val txCenter = when {
+            transponder.uplinkLow != null && transponder.uplinkHigh != null ->
+                (transponder.uplinkLow!! + transponder.uplinkHigh!!) / 2
+            transponder.uplinkLow != null -> transponder.uplinkLow!!
+            else -> null
+        }
+        // Show nominal frequencies immediately
+        val rxNominal = if (txCenter != null) {
+            TransponderMapper.mapUplinkToDownlink(txCenter, transponder)
+        } else {
+            // Downlink-only transponder (beacon etc.) - use downlink directly
+            transponder.downlinkLow
+        }
+        _state.update {
+            it.copy(
+                selectedTransponder = transponder,
+                txBaseFrequencyHz = txCenter,
+                txFrequencyHz = txCenter,
+                rxFrequencyHz = rxNominal,
+                txMode = transponder.uplinkMode,
+                rxMode = transponder.downlinkMode
+                    ?: transponder.uplinkMode?.let { m ->
+                        TransponderMapper.mapUplinkModeToDownlinkMode(m, transponder.isInverted)
+                    }
+            )
+        }
+    }
+
+    override fun setTxBaseFrequency(frequencyHz: Long) {
+        _state.update { it.copy(txBaseFrequencyHz = frequencyHz) }
+    }
+
+    override fun adjustTxBaseFrequency(deltaHz: Long) {
+        val current = _state.value.txBaseFrequencyHz ?: return
+        _state.update { it.copy(txBaseFrequencyHz = current + deltaHz) }
+    }
+
+    override fun setCtcssTone(toneHz: Double?) {
+        _state.update { it.copy(ctcssTone = toneHz) }
+        appScope.launch {
+            val tx = txController
+            if (toneHz != null) {
+                tx?.setCtcssTone(toneHz)
+                tx?.setCtcssMode(true)
+            } else {
+                tx?.setCtcssMode(false)
+            }
+        }
+    }
+
+    override fun setMode(txMode: String, rxMode: String) {
+        appScope.launch {
+            txController?.setMode(txMode)
+            rxController?.setMode(rxMode)
+        }
+        _state.update { it.copy(txMode = txMode, rxMode = rxMode) }
+    }
+
+}

core/data/src/main/java/com/rtbishop/look4sat/core/data/injection/MainContainer.kt

@@ -9,7 +9,9 @@ import android.view.WindowManager
 import androidx.room.Room
 import com.rtbishop.look4sat.core.data.database.Look4SatDb
 import com.rtbishop.look4sat.core.data.framework.BluetoothReporter
+import com.rtbishop.look4sat.core.data.framework.Ft817Controller
 import com.rtbishop.look4sat.core.data.framework.NetworkReporter
+import com.rtbishop.look4sat.core.data.framework.RadioTrackingService
 import com.rtbishop.look4sat.core.data.repository.DatabaseRepo
 import com.rtbishop.look4sat.core.data.repository.SatelliteRepo
 import com.rtbishop.look4sat.core.data.repository.SelectionRepo
@@ -19,15 +21,15 @@ import com.rtbishop.look4sat.core.data.source.LocalSource
 import com.rtbishop.look4sat.core.data.source.RemoteSource
 import com.rtbishop.look4sat.core.data.usecase.AddToCalendar
 import com.rtbishop.look4sat.core.data.usecase.ShowToast
-import com.rtbishop.look4sat.core.domain.repository.ExtendedParams
 import com.rtbishop.look4sat.core.domain.repository.IDatabaseRepo
 import com.rtbishop.look4sat.core.domain.repository.IMainContainer
-import com.rtbishop.look4sat.core.domain.repository.IReporterRepo
+import com.rtbishop.look4sat.core.domain.repository.IRadioController
+import com.rtbishop.look4sat.core.domain.repository.IRadioTrackingService
+import com.rtbishop.look4sat.core.domain.repository.IReporter
 import com.rtbishop.look4sat.core.domain.repository.ISatelliteRepo
 import com.rtbishop.look4sat.core.domain.repository.ISelectionRepo
 import com.rtbishop.look4sat.core.domain.repository.ISensorsRepo
 import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
-import com.rtbishop.look4sat.core.domain.repository.WithoutExtParams
 import com.rtbishop.look4sat.core.domain.source.ILocalSource
 import com.rtbishop.look4sat.core.domain.source.IRemoteSource
 import com.rtbishop.look4sat.core.domain.usecase.IAddToCalendar
@@ -48,18 +50,47 @@ class MainContainer(private val context: Context) : IMainContainer {
     override val selectionRepo = provideSelectionRepo()
     override val satelliteRepo = provideSatelliteRepo()
     override val databaseRepo = provideDatabaseRepo()
+    override val radioTrackingService: IRadioTrackingService by lazy {
+        val manager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
+        RadioTrackingService(appScope, manager, satelliteRepo, settingsRepo)
+    }
 
     override fun provideAddToCalendar(): IAddToCalendar = AddToCalendar(context)
 
     override fun provideShowToast(): IShowToast = ShowToast(context)
 
-    override fun provideBluetoothReporter(): IReporterRepo<WithoutExtParams> {
+    override fun provideBluetoothReporter(): IReporter {
         val manager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
-        return BluetoothReporter(manager, CoroutineScope(Dispatchers.IO))
+        val rc = settingsRepo.rcSettings.value
+        return BluetoothReporter(
+            manager,
+            CoroutineScope(Dispatchers.IO),
+            rc.bluetoothRotatorAddress,
+            rc.bluetoothFrequencyAddress
+        )
     }
 
-    override fun provideNetworkReporter(): IReporterRepo<ExtendedParams> {
-        return NetworkReporter(CoroutineScope(Dispatchers.IO))
+    override fun provideNetworkReporter(): IReporter {
+        val rc = settingsRepo.rcSettings.value
+        return NetworkReporter(
+            CoroutineScope(Dispatchers.IO),
+            rc.rotatorAddress,
+            rc.rotatorPort.toIntOrNull() ?: 0,
+            rc.frequencyAddress,
+            rc.frequencyPort.toIntOrNull() ?: 0
+        )
+    }
+
+    override fun provideTxRadioController(): IRadioController {
+        val manager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
+        val address = settingsRepo.radioControlSettings.value.txRadioAddress
+        return Ft817Controller(manager, address)
+    }
+
+    override fun provideRxRadioController(): IRadioController {
+        val manager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
+        val address = settingsRepo.radioControlSettings.value.rxRadioAddress
+        return Ft817Controller(manager, address)
     }
 
     override fun provideSensorsRepo(): ISensorsRepo {

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/DatabaseRepo.kt

@@ -18,7 +18,6 @@
 package com.rtbishop.look4sat.core.data.repository
 
 import com.rtbishop.look4sat.core.domain.model.DatabaseState
-import com.rtbishop.look4sat.core.domain.model.SatRadio
 import com.rtbishop.look4sat.core.domain.predict.OrbitalData
 import com.rtbishop.look4sat.core.domain.repository.IDatabaseRepo
 import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
@@ -28,7 +27,9 @@ import com.rtbishop.look4sat.core.domain.source.Sources
 import com.rtbishop.look4sat.core.domain.utility.DataParser
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.async
+import kotlinx.coroutines.awaitAll
 import kotlinx.coroutines.withContext
+import java.io.InputStream
 import java.util.zip.ZipInputStream
 
 class DatabaseRepo(
@@ -39,78 +40,57 @@ class DatabaseRepo(
     private val settingsRepo: ISettingsRepo
 ) : IDatabaseRepo {
 
+    private companion object {
+        val tleTypes = setOf("Amsat", "R4UAB", "Other")
+        val zippedTleTypes = setOf("McCants", "Classified")
+    }
+
     override suspend fun updateTLEFromFile(uri: String) = withContext(dispatcher) {
-        val importedSatellites = remoteSource.getFileStream(uri)?.let { dataParser.parseTLEStream(it) }
-        importedSatellites?.let { localSource.insertEntries(it) }
+        remoteSource.getFileStream(uri)?.let { stream ->
+            val entries = dataParser.parseTLEStream(stream)
+            localSource.insertEntries(entries)
+            settingsRepo.setSatelliteTypeIds("Other", entries.map { it.catnum })
+        }
         setUpdateSuccessful(System.currentTimeMillis())
     }
 
     override suspend fun updateTransceiversFromFile(uri: String) = withContext(dispatcher) {
-        val radios = remoteSource.getFileStream(uri)?.let { dataParser.parseJSONStream(it) }
-        radios?.let {
-            if(it.isNotEmpty()) {
+        remoteSource.getFileStream(uri)
+            ?.let { dataParser.parseJSONStream(it) }
+            ?.takeIf { it.isNotEmpty() }
+            ?.let {
                 localSource.deleteRadios()
                 localSource.insertRadios(it)
             }
-        }
         setUpdateSuccessful(System.currentTimeMillis())
     }
 
     override suspend fun updateFromRemote() = withContext(dispatcher) {
-        val importedEntries = mutableListOf<OrbitalData>()
-        val importedRadios = mutableListOf<SatRadio>()
-        val tleUrls = Sources.satelliteDataUrls.toMutableMap().apply {
-            if (settingsRepo.dataSourcesSettings.value.useCustomTLE) {
-                this["Other"] = settingsRepo.dataSourcesSettings.value.tleUrl
-            }
-        }
-        val jobsMap = tleUrls
-            .filter { (_, url) -> url.isNotEmpty() }
-            .mapValues { (_, url) -> async { remoteSource.getNetworkStream(url) } }
+        val dataSourcesSettings = settingsRepo.dataSourcesSettings.value
+        val tleUrls = buildMap {
+            putAll(Sources.satelliteDataUrls)
+            if (dataSourcesSettings.useCustomTLE) put("Other", dataSourcesSettings.tleUrl)
+        }.filterValues { it.isNotEmpty() }
+
         val radioUrls = buildList {
             add(Sources.RADIO_DATA_URL)
-            if (settingsRepo.dataSourcesSettings.value.useCustomTransceivers) {
-                add(settingsRepo.dataSourcesSettings.value.transceiversUrl)
-            }
+            if (dataSourcesSettings.useCustomTransceivers) add(dataSourcesSettings.transceiversUrl)
         }
-        val jobRadios = radioUrls.associateWith { url -> async { remoteSource.getNetworkStream(url) } }
-        // parse
-        jobsMap.mapValues { job -> job.value.await() }.forEach { entry ->
-            entry.value?.let { stream ->
-                when (val type = entry.key) {
-                    "Amsat", "R4UAB", "Other" -> {
-                        // parse tle stream
-                        val satellites = dataParser.parseTLEStream(stream)
-                        val catnums = satellites.map { it.catnum }
-                        settingsRepo.setSatelliteTypeIds(type, catnums)
-                        importedEntries.addAll(satellites)
-                    }
 
-                    "McCants", "Classified" -> {
-                        // unzip and parse tle stream
-                        val unzipped = ZipInputStream(stream).apply { nextEntry }
-                        val satellites = dataParser.parseTLEStream(unzipped)
-                        val catnums = satellites.map { it.catnum }
-                        settingsRepo.setSatelliteTypeIds(type, catnums)
-                        importedEntries.addAll(satellites)
-                    }
+        // launch all network requests concurrently
+        val tleJobs = tleUrls.map { (type, url) -> async { type to remoteSource.getNetworkStream(url) } }
+        val radioJobs = radioUrls.map { url -> async { remoteSource.getNetworkStream(url) } }
 
-                    else -> {
-                        // parse csv stream
-                        val satellites = dataParser.parseCSVStream(stream)
-                        val catnums = satellites.map { it.catnum }
-                        settingsRepo.setSatelliteTypeIds(type, catnums)
-                        importedEntries.addAll(satellites)
-                    }
-                }
+        // parse satellite data
+        val importedEntries = tleJobs.awaitAll().flatMap { (type, stream) ->
+            stream?.let { parseSatelliteStream(type, it) }.orEmpty().also { satellites ->
+                settingsRepo.setSatelliteTypeIds(type, satellites.map { it.catnum })
             }
         }
-        jobRadios.values.forEach { job ->
-            job.await()?.let {
-                importedRadios.addAll(dataParser.parseJSONStream(it))
-            }
-        }
-        // insert
+
+        // parse radio data
+        val importedRadios = radioJobs.awaitAll().filterNotNull().flatMap { dataParser.parseJSONStream(it) }
+
         localSource.insertEntries(importedEntries)
         localSource.insertRadios(importedRadios)
         setUpdateSuccessful(System.currentTimeMillis())
@@ -122,9 +102,15 @@ class DatabaseRepo(
         setUpdateSuccessful(0L)
     }
 
-    private suspend fun setUpdateSuccessful(timestamp: Long) = withContext(dispatcher) {
-        val numberOfRadios = localSource.getRadiosTotal()
-        val numberOfSatellites = localSource.getEntriesTotal()
-        settingsRepo.updateDatabaseState(DatabaseState(numberOfRadios, numberOfSatellites, timestamp))
+    private suspend fun parseSatelliteStream(type: String, stream: InputStream): List<OrbitalData> = when (type) {
+        in tleTypes -> dataParser.parseTLEStream(stream)
+        in zippedTleTypes -> dataParser.parseTLEStream(ZipInputStream(stream).apply { nextEntry })
+        else -> dataParser.parseCSVStream(stream)
+    }
+
+    private suspend fun setUpdateSuccessful(timestamp: Long) {
+        settingsRepo.updateDatabaseState(
+            DatabaseState(localSource.getRadiosTotal(), localSource.getEntriesTotal(), timestamp)
+        )
     }
 }

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/SatelliteRepo.kt

@@ -28,6 +28,9 @@ import com.rtbishop.look4sat.core.domain.source.ILocalSource
 import com.rtbishop.look4sat.core.domain.utility.round
 import com.rtbishop.look4sat.core.domain.utility.toDegrees
 import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.async
+import kotlinx.coroutines.awaitAll
+import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.update
@@ -51,8 +54,7 @@ class SatelliteRepo(
         settingsRepo.selectedIds.collect { selectedIds ->
             _satellites.update { localStorage.getEntriesWithIds(selectedIds) }
             val (hoursAhead, minElevation, modes) = settingsRepo.passesSettings.value
-            val timeNow = 1000 * ((System.currentTimeMillis() + 500) / 1000)
-            calculatePasses(timeNow, hoursAhead, minElevation, modes)
+            calculatePasses(System.currentTimeMillis(), hoursAhead, minElevation, modes)
         }
     }
 
@@ -62,7 +64,8 @@ class SatelliteRepo(
 
     override suspend fun getTrack(sat: OrbitalObject, pos: GeoPos, start: Long, end: Long): List<OrbitalPos> {
         return withContext(dispatcher) {
-            val positions = mutableListOf<OrbitalPos>()
+            val estimatedSize = ((end - start) / 15000).toInt() + 1
+            val positions = ArrayList<OrbitalPos>(estimatedSize)
             var currentTime = start
             while (currentTime < end) {
                 positions.add(sat.getPosition(pos, currentTime))
@@ -80,44 +83,49 @@ class SatelliteRepo(
     ): List<SatRadio> {
         return withContext(dispatcher) {
             val satPos = sat.getPosition(pos, time)
-            val copiedList = radios.map { it.copy() }
-            copiedList.forEach { transmitter ->
-                transmitter.downlinkLow?.let { transmitter.downlinkLow = satPos.getDownlinkFreq(it) }
-                transmitter.downlinkHigh?.let { transmitter.downlinkHigh = satPos.getDownlinkFreq(it) }
-                transmitter.uplinkLow?.let { transmitter.uplinkLow = satPos.getUplinkFreq(it) }
-                transmitter.uplinkHigh?.let { transmitter.uplinkHigh = satPos.getUplinkFreq(it) }
+            radios.map { transmitter ->
+                transmitter.copy(
+                    downlinkLow = transmitter.downlinkLow?.let { satPos.getDownlinkFreq(it) },
+                    downlinkHigh = transmitter.downlinkHigh?.let { satPos.getDownlinkFreq(it) },
+                    uplinkLow = transmitter.uplinkLow?.let { satPos.getUplinkFreq(it) },
+                    uplinkHigh = transmitter.uplinkHigh?.let { satPos.getUplinkFreq(it) }
+                )
             }
-            copiedList.map { it.copy() }
-        }
-    }
-
-    override suspend fun processPasses(passList: List<OrbitalPass>, time: Long): List<OrbitalPass> {
-        return withContext(dispatcher) {
-            passList.forEach { pass ->
-                if (!pass.isDeepSpace) {
-                    val timeStart = pass.aosTime
-                    if (time > timeStart) {
-                        val deltaNow = time.minus(timeStart).toFloat()
-                        val deltaTotal = pass.losTime.minus(timeStart).toFloat()
-                        pass.progress = (deltaNow / deltaTotal).round(2)
-                    }
-                }
-            }
-            passList.filter { pass -> pass.progress < 1.0 }.map { it.copy() }
         }
     }
 
     override suspend fun calculatePasses(time: Long, hoursAhead: Int, minElevation: Double, modes: List<String>) {
-        if (_satellites.value.isNotEmpty()) {
+        // Normalize to the start of the current minute so that coarse 60-second stepping
+        // in getLeoPass always begins from the same phase, producing stable AOS/LOS times
+        val normalizedTime = time / 60_000L * 60_000L
+        val currentSatellites = _satellites.value
+        if (currentSatellites.isNotEmpty()) {
             withContext(dispatcher) {
-                val newPasses = mutableListOf<OrbitalPass>()
                 val idsWithModes = localStorage.getIdsWithModes(modes)
-                _satellites.value.forEach { satellite ->
-                    if (idsWithModes.isEmpty() || satellite.data.catnum in idsWithModes) {
-                        newPasses.addAll(satellite.getPasses(settingsRepo.stationPosition.value, time, hoursAhead))
+                val stationPos = settingsRepo.stationPosition.value
+                val filteredSatellites = if (idsWithModes.isEmpty()) {
+                    currentSatellites
+                } else {
+                    currentSatellites.filter { it.data.catnum in idsWithModes }
+                }
+                // Compute passes for each satellite in parallel
+                val passLists = coroutineScope {
+                    filteredSatellites.map { satellite ->
+                        async { satellite.getPasses(stationPos, normalizedTime, hoursAhead) }
+                    }.awaitAll()
+                }
+                // Flatten and filter in a single pass
+                val timeFuture = normalizedTime + (hoursAhead * 60L * 60L * 1000L)
+                val newPasses = ArrayList<OrbitalPass>()
+                for (list in passLists) {
+                    for (pass in list) {
+                        if (pass.losTime > time && pass.aosTime < timeFuture && pass.maxElevation > minElevation) {
+                            newPasses.add(pass)
+                        }
                     }
                 }
-                _passes.update { newPasses.filter(time, hoursAhead, minElevation) }
+                newPasses.sortBy { it.aosTime }
+                _passes.update { newPasses }
             }
         } else {
             _passes.update { emptyList() }
@@ -149,12 +157,6 @@ class SatelliteRepo(
         return passes
     }
 
-    private fun List<OrbitalPass>.filter(time: Long, hoursAhead: Int, minElev: Double): List<OrbitalPass> {
-        val timeFuture = time + (hoursAhead * 60L * 60L * 1000L)
-        return this.filter { it.losTime > time }.filter { it.aosTime < timeFuture }
-            .filter { it.maxElevation > minElev }.sortedBy { it.aosTime }
-    }
-
     private fun getGeoPass(sat: OrbitalObject, pos: GeoPos, time: Long): OrbitalPass {
         val satPos = sat.getPosition(pos, time)
         val aos = time - 24 * 60L * 60L * 1000L
@@ -170,72 +172,64 @@ class SatelliteRepo(
         var calendarTimeMillis = time
         var elevation: Double
         var maxElevation = 0.0
-        var alt = 0.0 // var tcaAz = 0.0
         // rewind 1/4 of an orbit
-        if (rewind) calendarTimeMillis += -quarterOrbitMin * 60L * 1000L
+        if (rewind) calendarTimeMillis -= quarterOrbitMin * 60L * 1000L
 
-        var satPos = sat.getPosition(pos, calendarTimeMillis)
-        if (satPos.elevation > 0.0) {
+        // Use lightweight elevation check for coarse searching
+        if (sat.getElevation(pos, calendarTimeMillis) > 0.0) {
             // move forward in 30 second intervals until the sat goes below the horizon
             do {
                 calendarTimeMillis += 30 * 1000L
-                satPos = sat.getPosition(pos, calendarTimeMillis)
-            } while (satPos.elevation > 0.0)
+            } while (sat.getElevation(pos, calendarTimeMillis) > 0.0)
             // move forward 3/4 of an orbit
             calendarTimeMillis += quarterOrbitMin * 3 * 60L * 1000L
         }
 
-        // find the next time sat comes above the horizon
+        // find the next time sat comes above the horizon (coarse: 60s steps)
         do {
             calendarTimeMillis += 60L * 1000L
-            satPos = sat.getPosition(pos, calendarTimeMillis)
-            elevation = satPos.elevation
-            if (elevation > maxElevation) {
-                maxElevation = elevation
-                alt = satPos.altitude // tcaAz = satPos.azimuth.toDegrees()
-            }
-        } while (satPos.elevation < 0.0)
+            elevation = sat.getElevation(pos, calendarTimeMillis)
+            if (elevation > maxElevation) maxElevation = elevation
+        } while (elevation < 0.0)
 
-        // refine to 1 second
-        calendarTimeMillis += -60L * 1000L
+        // refine AOS to ~500ms precision
+        calendarTimeMillis -= 60L * 1000L
         do {
-            calendarTimeMillis += 1L * 500L
-            satPos = sat.getPosition(pos, calendarTimeMillis)
-            elevation = satPos.elevation
-            if (elevation > maxElevation) {
-                maxElevation = elevation
-                alt = satPos.altitude // tcaAz = satPos.azimuth.toDegrees()
-            }
-        } while (satPos.elevation < 0.0)
+            calendarTimeMillis += 500L
+            elevation = sat.getElevation(pos, calendarTimeMillis)
+            if (elevation > maxElevation) maxElevation = elevation
+        } while (elevation < 0.0)
 
-        val aos = 1000 * ((satPos.time + 500) / 1000)
-        val aosAz = satPos.azimuth.toDegrees().round(1)
+        // Get full position for AOS data (azimuth, altitude)
+        val aosPos = sat.getFullPosition(pos, calendarTimeMillis)
+        val aos = 1000 * ((aosPos.time + 500) / 1000)
+        val aosAz = aosPos.azimuth.toDegrees().round(1)
 
-        // find when sat goes below
+        // find when sat goes below (coarse: 30s steps)
         do {
             calendarTimeMillis += 30L * 1000L
-            satPos = sat.getPosition(pos, calendarTimeMillis)
-            elevation = satPos.elevation
-            if (elevation > maxElevation) {
-                maxElevation = elevation
-                alt = satPos.altitude // tcaAz = satPos.azimuth.toDegrees()
-            }
-        } while (satPos.elevation > 0.0)
+            elevation = sat.getElevation(pos, calendarTimeMillis)
+            if (elevation > maxElevation) maxElevation = elevation
+        } while (elevation > 0.0)
 
-        // refine to 1 second
-        calendarTimeMillis += -30L * 1000L
+        // refine LOS to ~500ms precision
+        calendarTimeMillis -= 30L * 1000L
         do {
-            calendarTimeMillis += 1L * 500L
-            satPos = sat.getPosition(pos, calendarTimeMillis)
-            elevation = satPos.elevation
-            if (elevation > maxElevation) {
-                maxElevation = elevation
-                alt = satPos.altitude // tcaAz = satPos.azimuth.toDegrees()
-            }
-        } while (satPos.elevation > 0.0)
+            calendarTimeMillis += 500L
+            elevation = sat.getElevation(pos, calendarTimeMillis)
+            if (elevation > maxElevation) maxElevation = elevation
+        } while (elevation > 0.0)
+
+        // Get full position for LOS data (azimuth, altitude)
+        val losPos = sat.getFullPosition(pos, calendarTimeMillis)
+        val los = 1000 * ((losPos.time + 500) / 1000)
+        val losAz = losPos.azimuth.toDegrees().round(1)
+
+        // Get altitude at approximate TCA (max elevation)
+        val tcaTime = (aos + los) / 2
+        val tcaPos = sat.getFullPosition(pos, tcaTime)
+        val alt = tcaPos.altitude
 
-        val los = 1000 * ((satPos.time + 500) / 1000) // val tca = (aos + los) / 2
-        val losAz = satPos.azimuth.toDegrees().round(1)
         val elev = maxElevation.toDegrees().round(1)
         return OrbitalPass(aos, aosAz, los, losAz, alt.toInt(), elev, sat)
     }

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/SelectionRepo.kt

@@ -40,11 +40,23 @@ class SelectionRepo(
     private val currentItems = MutableStateFlow<List<SatItem>>(emptyList())
     private val currentTypes = MutableStateFlow(settingsRepo.selectedTypes.value)
     private val currentQuery = MutableStateFlow("")
+
+    // Resolve type IDs once when types change, then filter items reactively.
+    // The HashSet gives O(1) catnum lookups instead of O(n) with a List.
     private val itemsWithTypes = currentTypes.flatMapLatest { types: List<String> ->
-        currentItems.map { items -> items.filterByTypes(types) }
+        val catnumSet: Set<Int>? = if (types.isEmpty()) {
+            null // null = no filtering
+        } else {
+            val ids = settingsRepo.getSatelliteTypesIds(types)
+            if (ids.isEmpty()) null else ids.toHashSet()
+        }
+        currentItems.map { items ->
+            if (catnumSet == null) items else items.filter { it.catnum in catnumSet }
+        }
     }
+
     private val itemsWithQuery = currentQuery.flatMapLatest { query ->
-        itemsWithTypes.map { items -> items.filterByQuery(query) }
+        itemsWithTypes.map { items -> filterByQuery(items, query) }
     }
 
     override fun getCurrentTypes() = currentTypes.value
@@ -54,7 +66,7 @@ class SelectionRepo(
     }
 
     override suspend fun getEntriesFlow() = withContext(dispatcher) {
-        val selectedIds = settingsRepo.selectedIds.value
+        val selectedIds = settingsRepo.selectedIds.value.toHashSet()
         currentItems.value = localSource.getEntriesList().map { item ->
             item.copy(isSelected = item.catnum in selectedIds)
         }
@@ -66,17 +78,19 @@ class SelectionRepo(
         settingsRepo.setSelectedTypes(types)
     }
 
-    override suspend fun setQuery(query: String) = withContext(dispatcher) {
+    override suspend fun setQuery(query: String) {
         currentQuery.value = query
     }
 
     override suspend fun setSelection(selectAll: Boolean) = withContext(dispatcher) {
-        setSelection(itemsWithQuery.first().map { item -> item.catnum }, selectAll)
+        val visibleIds = itemsWithQuery.first().mapTo(HashSet()) { it.catnum }
+        setSelection(visibleIds, selectAll)
     }
 
     override suspend fun setSelection(ids: List<Int>, isTicked: Boolean) = withContext(dispatcher) {
+        val idSet = ids.toHashSet()
         currentItems.value = currentItems.value.map { item ->
-            if (item.catnum in ids) item.copy(isSelected = isTicked) else item
+            if (item.catnum in idSet) item.copy(isSelected = isTicked) else item
         }
     }
 
@@ -85,19 +99,24 @@ class SelectionRepo(
         settingsRepo.setSelectedIds(currentSelection)
     }
 
-    private suspend fun List<SatItem>.filterByTypes(types: List<String>) = withContext(dispatcher) {
-        if (types.isEmpty()) return@withContext this@filterByTypes
-        val catnums = settingsRepo.getSatelliteTypesIds(types)
-        if (catnums.isEmpty()) return@withContext this@filterByTypes
-        return@withContext this@filterByTypes.filter { item -> item.catnum in catnums }
-    }
-
-    private suspend fun List<SatItem>.filterByQuery(query: String) = withContext(dispatcher) {
-        if (query.isBlank()) return@withContext this@filterByQuery
-        return@withContext try {
-            this@filterByQuery.filter { it.catnum == query.toInt() }
-        } catch (_: Exception) {
-            this@filterByQuery.filter { item -> item.name.lowercase().contains(query.lowercase()) }
+    /**
+     * Bulk selection using a pre-built Set for O(1) lookups.
+     */
+    private suspend fun setSelection(idSet: Set<Int>, isTicked: Boolean) = withContext(dispatcher) {
+        currentItems.value = currentItems.value.map { item ->
+            if (item.catnum in idSet) item.copy(isSelected = isTicked) else item
         }
     }
+
+    /**
+     * Filters items by query. Uses toIntOrNull() instead of exception-based flow,
+     * and lowercases the query once up front instead of per-item.
+     */
+    private fun filterByQuery(items: List<SatItem>, query: String): List<SatItem> {
+        if (query.isBlank()) return items
+        val catnum = query.toIntOrNull()
+        if (catnum != null) return items.filter { it.catnum == catnum }
+        val lowerQuery = query.lowercase()
+        return items.filter { it.name.lowercase().contains(lowerQuery) }
+    }
 }

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/SensorsRepo.kt

@@ -35,78 +35,109 @@ class SensorsRepo(
     private val sensorManager: SensorManager,
     private val sensor: Sensor?,
     private val windowManager: WindowManager
-) :
-    SensorEventListener, ISensorsRepo {
+) : SensorEventListener, ISensorsRepo {
 
     private val _orientation = MutableStateFlow(Pair(0f, 0f))
     private val rotationMatrix = FloatArray(9)
+    private val tempMatrix = FloatArray(9)
     private val orientationValues = FloatArray(3)
-    private var sensorAccuracy = SensorManager.SENSOR_STATUS_UNRELIABLE
+    private var smoothAzimuth = 0f
+    private var smoothPitch = 0f
+    private var hasInitialReading = false
+
+    companion object {
+        private const val SMOOTHING_FACTOR = 0.15f
+    }
 
     override val orientation: StateFlow<Pair<Float, Float>> = _orientation
 
     override fun getMagDeclination(geoPos: GeoPos, time: Long): Float {
-        val latitude = geoPos.latitude.toFloat()
-        val longitude = geoPos.longitude.toFloat()
-        return GeomagneticField(latitude, longitude, geoPos.altitude.toFloat(), time).declination
+        return GeomagneticField(
+            geoPos.latitude.toFloat(),
+            geoPos.longitude.toFloat(),
+            geoPos.altitude.toFloat(),
+            time
+        ).declination
     }
 
     override fun enableSensor() {
+        hasInitialReading = false
         sensor?.let { sensorManager.registerListener(this, it, 8000) }
     }
 
     override fun disableSensor() = sensorManager.unregisterListener(this)
 
-    override fun onAccuracyChanged(sensor: Sensor, accuracy: Int) {
-        sensorAccuracy = accuracy
-    }
+    override fun onAccuracyChanged(sensor: Sensor, accuracy: Int) = Unit
 
-    override fun onSensorChanged(event: SensorEvent) = when {
-        sensorAccuracy == SensorManager.SENSOR_STATUS_UNRELIABLE -> {}
-        event.sensor == sensor -> updateOrientation(event.values)
-        else -> {}
+    override fun onSensorChanged(event: SensorEvent) {
+        if (event.sensor == sensor) updateOrientation(event.values)
     }
 
     private fun getDisplayRotation(): Int {
         return try {
             @Suppress("DEPRECATION")
             windowManager.defaultDisplay.rotation
-        } catch (e: Exception) {
+        } catch (_: Exception) {
             Surface.ROTATION_0
         }
     }
 
-    private fun transformRotationMatrix(rotationMatrix: FloatArray, rotation: Int) {
-        val tempMatrix = FloatArray(9)
-        when (rotation) {
-            Surface.ROTATION_0 -> {
-                SensorManager.remapCoordinateSystem(rotationMatrix, SensorManager.AXIS_X, SensorManager.AXIS_Y, tempMatrix)
-                System.arraycopy(tempMatrix, 0, rotationMatrix, 0, 9)
-            }
-            Surface.ROTATION_90 -> {
-                SensorManager.remapCoordinateSystem(rotationMatrix, SensorManager.AXIS_Y, SensorManager.AXIS_MINUS_X, tempMatrix)
-                SensorManager.remapCoordinateSystem(tempMatrix, SensorManager.AXIS_MINUS_X, SensorManager.AXIS_Y, rotationMatrix)
-            }
-            Surface.ROTATION_180 -> {
-                SensorManager.remapCoordinateSystem(rotationMatrix, SensorManager.AXIS_MINUS_X, SensorManager.AXIS_MINUS_Y, tempMatrix)
-                System.arraycopy(tempMatrix, 0, rotationMatrix, 0, 9)
-            }
-            Surface.ROTATION_270 -> {
-                SensorManager.remapCoordinateSystem(rotationMatrix, SensorManager.AXIS_MINUS_Y, SensorManager.AXIS_X, tempMatrix)
-                SensorManager.remapCoordinateSystem(tempMatrix, SensorManager.AXIS_MINUS_X, SensorManager.AXIS_Y, rotationMatrix)
-            }
+    private fun remapForRotation(rotation: Int) {
+        val remapped = when (rotation) {
+            Surface.ROTATION_90 -> SensorManager.remapCoordinateSystem(
+                rotationMatrix, SensorManager.AXIS_Y, SensorManager.AXIS_MINUS_X, tempMatrix
+            )
+
+            Surface.ROTATION_180 -> SensorManager.remapCoordinateSystem(
+                rotationMatrix, SensorManager.AXIS_MINUS_X, SensorManager.AXIS_MINUS_Y, tempMatrix
+            )
+
+            Surface.ROTATION_270 -> SensorManager.remapCoordinateSystem(
+                rotationMatrix, SensorManager.AXIS_MINUS_Y, SensorManager.AXIS_X, tempMatrix
+            )
+
+            else -> false
         }
+        if (remapped) System.arraycopy(tempMatrix, 0, rotationMatrix, 0, 9)
     }
 
     private fun updateOrientation(rotationVector: FloatArray) {
         SensorManager.getRotationMatrixFromVector(rotationMatrix, rotationVector)
-        transformRotationMatrix(rotationMatrix, getDisplayRotation())
+        remapForRotation(getDisplayRotation())
         SensorManager.getOrientation(rotationMatrix, orientationValues)
         val azimuth = (orientationValues[0] * RAD2DEG).toFloat()
-        val pitch = (orientationValues[1] * RAD2DEG).toFloat() // roll [2]
+        val pitch = (orientationValues[1] * RAD2DEG).toFloat()
         val magneticAzimuth = (azimuth + 360f) % 360f
-        val roundedAzimuth = round(magneticAzimuth * 10) / 10
-        val roundedPitch = round(pitch * 10) / 10
-        _orientation.value = Pair(roundedAzimuth, roundedPitch)
+
+        if (!hasInitialReading) {
+            smoothAzimuth = magneticAzimuth
+            smoothPitch = pitch
+            hasInitialReading = true
+        } else {
+            smoothAzimuth = lowPassAngle(smoothAzimuth, magneticAzimuth)
+            smoothPitch = lowPass(smoothPitch, pitch)
+        }
+
+        _orientation.value = Pair(
+            round(smoothAzimuth * 10) / 10,
+            round(smoothPitch * 10) / 10
+        )
+    }
+
+    /** Standard exponential low-pass filter. */
+    private fun lowPass(previous: Float, current: Float): Float {
+        return previous + SMOOTHING_FACTOR * (current - previous)
+    }
+
+    /**
+     * Low-pass filter that accounts for the 0°/360° wraparound.
+     * Always takes the shortest angular path between the two values.
+     */
+    private fun lowPassAngle(previous: Float, current: Float): Float {
+        var delta = current - previous
+        // Normalise delta into the range (-180, 180]
+        while (delta > 180f) delta -= 360f
+        while (delta <= -180f) delta += 360f
+        return (previous + SMOOTHING_FACTOR * delta + 360f) % 360f
     }
 }

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/SettingsRepo.kt

@@ -28,6 +28,7 @@ import com.rtbishop.look4sat.core.domain.model.DatabaseState
 import com.rtbishop.look4sat.core.domain.model.OtherSettings
 import com.rtbishop.look4sat.core.domain.model.PassesSettings
 import com.rtbishop.look4sat.core.domain.model.RCSettings
+import com.rtbishop.look4sat.core.domain.model.RadioControlSettings
 import com.rtbishop.look4sat.core.domain.predict.GeoPos
 import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
 import com.rtbishop.look4sat.core.domain.utility.positionToQth
@@ -246,82 +247,51 @@ class SettingsRepo(
     //endregion
 
     //region # RC settings
+    init {
+        migrateRCFormats()
+    }
+
+    // TODO: Remove after a few releases (added in v4.2.0)
+    private val keyRCFormatsMigrated = "rcFormatsMigrated"
+
+    private fun migrateRCFormats() {
+        if (preferences.getBoolean(keyRCFormatsMigrated, false)) return
+        val formatKeys = listOf(
+            keyRotatorFormat, keyFrequencyFormat, keyBluetoothRotatorFormat, keyBluetoothFrequencyFormat
+        )
+        preferences.edit {
+            for (key in formatKeys) {
+                val value = preferences.getString(key, null) ?: continue
+                if (value.contains("_") && !value.startsWith("\\")) {
+                    putString(key, "\\$value")
+                }
+            }
+            putBoolean(keyRCFormatsMigrated, true)
+        }
+    }
+
     private val _rcSettings = MutableStateFlow(getRCSettings())
     override val rcSettings: StateFlow<RCSettings> = _rcSettings
 
-    override fun setBluetoothRotatorAddress(value: String) {
-        preferences.edit { putString(keyBluetoothRotatorAddress, value) }
-        _rcSettings.update { it.copy(bluetoothRotatorAddress = value) }
-    }
-
-    override fun setBluetoothRotatorFormat(value: String) {
-        preferences.edit { putString(keyBluetoothRotatorFormat, value) }
-        _rcSettings.update { it.copy(bluetoothRotatorFormat = value) }
-    }
-
-    override fun setBluetoothRotatorName(value: String) {
-        preferences.edit { putString(keyBluetoothRotatorName, value) }
-        _rcSettings.update { it.copy(bluetoothRotatorName = value) }
-    }
-
-    override fun setBluetoothRotatorState(value: Boolean) {
-        preferences.edit { putBoolean(keyBluetoothRotatorState, value) }
-        _rcSettings.update { it.copy(bluetoothRotatorState = value) }
-    }
-
-    override fun setBluetoothFrequencyState(value: Boolean) {
-        preferences.edit { putBoolean(keyBluetoothFrequencyState, value) }
-        _rcSettings.update { it.copy(bluetoothFrequencyState = value) }
-    }
-
-    override fun setBluetoothFrequencyAddress(value: String) {
-        preferences.edit { putString(keyBluetoothFrequencyAddress, value) }
-        _rcSettings.update { it.copy(bluetoothFrequencyAddress = value) }
-    }
-
-    override fun setBluetoothFrequencyFormat(value: String) {
-        preferences.edit { putString(keyBluetoothFrequencyFormat, value) }
-        _rcSettings.update { it.copy(bluetoothFrequencyFormat = value) }
-    }
-
-    override fun setRotatorAddress(value: String) {
-        preferences.edit { putString(keyRotatorAddress, value) }
-        _rcSettings.update { it.copy(rotatorAddress = value) }
-    }
-
-    override fun setRotatorPort(value: String) {
-        preferences.edit { putString(keyRotatorPort, value) }
-        _rcSettings.update { it.copy(rotatorPort = value) }
-    }
-
-    override fun setRotatorState(value: Boolean) {
-        preferences.edit { putBoolean(keyRotatorState, value) }
-        _rcSettings.update { it.copy(rotatorState = value) }
-    }
-
-    override fun setRotatorFormat(value: String) {
-        preferences.edit { putString(keyRotatorFormat, value) }
-        _rcSettings.update { it.copy(rotatorFormat = value) }
-    }
-
-    override fun setFrequencyState(value: Boolean) {
-        preferences.edit { putBoolean(keyFrequencyState, value) }
-        _rcSettings.update { it.copy(frequencyState = value) }
-    }
-
-    override fun setFrequencyAddress(value: String) {
-        preferences.edit { putString(keyFrequencyAddress, value) }
-        _rcSettings.update { it.copy(frequencyAddress = value) }
-    }
-
-    override fun setFrequencyPort(value: String) {
-        preferences.edit { putString(keyFrequencyPort, value) }
-        _rcSettings.update { it.copy(frequencyPort = value) }
-    }
-
-    override fun setFrequencyFormat(value: String) {
-        preferences.edit { putString(keyFrequencyFormat, value) }
-        _rcSettings.update { it.copy(frequencyFormat = value) }
+    override fun updateRCSettings(settings: RCSettings) {
+        preferences.edit {
+            putBoolean(keyRotatorState, settings.rotatorState)
+            putString(keyRotatorAddress, settings.rotatorAddress)
+            putString(keyRotatorPort, settings.rotatorPort)
+            putString(keyRotatorFormat, settings.rotatorFormat)
+            putBoolean(keyFrequencyState, settings.frequencyState)
+            putString(keyFrequencyAddress, settings.frequencyAddress)
+            putString(keyFrequencyPort, settings.frequencyPort)
+            putString(keyFrequencyFormat, settings.frequencyFormat)
+            putBoolean(keyBluetoothRotatorState, settings.bluetoothRotatorState)
+            putString(keyBluetoothRotatorFormat, settings.bluetoothRotatorFormat)
+            putString(keyBluetoothRotatorName, settings.bluetoothRotatorName)
+            putString(keyBluetoothRotatorAddress, settings.bluetoothRotatorAddress)
+            putBoolean(keyBluetoothFrequencyState, settings.bluetoothFrequencyState)
+            putString(keyBluetoothFrequencyFormat, settings.bluetoothFrequencyFormat)
+            putString(keyBluetoothFrequencyAddress, settings.bluetoothFrequencyAddress)
+        }
+        _rcSettings.value = settings
     }
 
     private fun getRCSettings(): RCSettings = RCSettings(
@@ -332,14 +302,14 @@ class SettingsRepo(
         frequencyState = preferences.getBoolean(keyFrequencyState, false),
         frequencyAddress = preferences.getString(keyFrequencyAddress, null) ?: "127.0.0.1",
         frequencyPort = preferences.getString(keyFrequencyPort, null) ?: "4532",
-        frequencyFormat = preferences.getString(keyFrequencyFormat, null) ?: $$"set_freq $FREQ",
+        frequencyFormat = preferences.getString(keyFrequencyFormat, null) ?: $$"F $FREQ",
         bluetoothRotatorState = preferences.getBoolean(keyBluetoothRotatorState, false),
-        bluetoothRotatorFormat = preferences.getString(keyBluetoothRotatorFormat, null) ?: $$"W$AZ $EL",
+        bluetoothRotatorFormat = preferences.getString(keyBluetoothRotatorFormat, null) ?: $$"P $AZ $EL",
         bluetoothRotatorName = preferences.getString(keyBluetoothRotatorName, null) ?: "Default",
         bluetoothRotatorAddress = preferences.getString(keyBluetoothRotatorAddress, null) ?: "00:0C:BF:13:80:5D",
         bluetoothFrequencyState = preferences.getBoolean(keyBluetoothFrequencyState, false),
         bluetoothFrequencyAddress = preferences.getString(keyBluetoothFrequencyAddress, null) ?: "00:0C:BF:13:80:5D",
-        bluetoothFrequencyFormat = preferences.getString(keyBluetoothFrequencyFormat, null) ?: $$"FA$FREQ"
+        bluetoothFrequencyFormat = preferences.getString(keyBluetoothFrequencyFormat, null) ?: $$"F $FREQ"
     )
     //endregion
 
@@ -347,39 +317,20 @@ class SettingsRepo(
     private val _otherSettings = MutableStateFlow(getOtherSettings())
     override val otherSettings: StateFlow<OtherSettings> = _otherSettings
 
-    override fun setStateOfAutoUpdate(value: Boolean) {
-        preferences.edit { putBoolean(keyStateOfAutoUpdate, value) }
-        _otherSettings.update { it.copy(stateOfAutoUpdate = value) }
-    }
-
-    override fun setStateOfSensors(value: Boolean) {
-        preferences.edit { putBoolean(keyStateOfSensors, value) }
-        _otherSettings.update { it.copy(stateOfSensors = value) }
-    }
-
-    override fun setStateOfSweep(value: Boolean) {
-        preferences.edit { putBoolean(keyStateOfSweep, value) }
-        _otherSettings.update { it.copy(stateOfSweep = value) }
-    }
-
-    override fun setStateOfUtc(value: Boolean) {
-        preferences.edit { putBoolean(keyStateOfUtc, value) }
-        _otherSettings.update { it.copy(stateOfUtc = value) }
-    }
-
-    override fun setStateOfLightTheme(value: Boolean){
-        preferences.edit { putBoolean(keyStateOfLightTheme, value) }
-        _otherSettings.update { it.copy(stateOfLightTheme = value) }
-    }
-
-    override fun setWarningDismissed() {
-        preferences.edit { putBoolean(keyShouldSeeWarning, false) }
-        _otherSettings.update { it.copy(shouldSeeWarning = false) }
-    }
-
-    override fun setWhatsNewDismissed() {
-        preferences.edit { putBoolean(keyShouldSeeWhatsNew, false) }
-        _otherSettings.update { it.copy(shouldSeeWhatsNew = false) }
+    override fun updateOtherSettings(transform: (OtherSettings) -> OtherSettings) {
+        _otherSettings.update { current ->
+            val new = transform(current)
+            preferences.edit {
+                putBoolean(keyStateOfAutoUpdate, new.stateOfAutoUpdate)
+                putBoolean(keyStateOfSensors, new.stateOfSensors)
+                putBoolean(keyStateOfSweep, new.stateOfSweep)
+                putBoolean(keyStateOfUtc, new.stateOfUtc)
+                putBoolean(keyStateOfLightTheme, new.stateOfLightTheme)
+                putBoolean(keyShouldSeeWarning, new.shouldSeeWarning)
+                putBoolean(keyShouldSeeWhatsNew, new.shouldSeeWhatsNew)
+            }
+            new
+        }
     }
 
     private fun getOtherSettings(): OtherSettings = OtherSettings(
@@ -397,24 +348,14 @@ class SettingsRepo(
     private val _dataSourcesSettings = MutableStateFlow(getDataSourcesSettings())
     override val dataSourcesSettings: StateFlow<DataSourcesSettings> = _dataSourcesSettings
 
-    override fun setUseCustomTle(value: Boolean) {
-        preferences.edit { putBoolean(keyUseCustomTle, value) }
-        _dataSourcesSettings.update { it.copy(useCustomTLE = value) }
-    }
-
-    override fun setUseCustomTransceivers(value: Boolean) {
-        preferences.edit { putBoolean(keyUseCustomTransceivers, value) }
-        _dataSourcesSettings.update { it.copy(useCustomTransceivers = value) }
-    }
-
-    override fun setTleUrl(value: String) {
-        preferences.edit { putString(keyTleUrl, value) }
-        _dataSourcesSettings.update { it.copy(tleUrl = value) }
-    }
-
-    override fun setTransceiversUrl(value: String) {
-        preferences.edit { putString(keyTransceiversUrl, value) }
-        _dataSourcesSettings.update { it.copy(transceiversUrl = value) }
+    override fun updateDataSourcesSettings(settings: DataSourcesSettings) {
+        preferences.edit {
+            putBoolean(keyUseCustomTle, settings.useCustomTLE)
+            putBoolean(keyUseCustomTransceivers, settings.useCustomTransceivers)
+            putString(keyTleUrl, settings.tleUrl)
+            putString(keyTransceiversUrl, settings.transceiversUrl)
+        }
+        _dataSourcesSettings.value = settings
     }
 
     private fun getDataSourcesSettings(): DataSourcesSettings = DataSourcesSettings(
@@ -424,4 +365,40 @@ class SettingsRepo(
         transceiversUrl = preferences.getString(keyTransceiversUrl, "https://example.com/radio.json") ?: ""
     )
     //endregion
+
+    //region # Radio control settings
+    private val keyRadioControlEnabled = "radioControlEnabled"
+    private val keyRadioModel = "radioModel"
+    private val keyTxRadioAddress = "txRadioAddress"
+    private val keyRxRadioAddress = "rxRadioAddress"
+    private val keyTxRadioName = "txRadioName"
+    private val keyRxRadioName = "rxRadioName"
+    private val keyRadioBaudRate = "radioBaudRate"
+
+    private val _radioControlSettings = MutableStateFlow(getRadioControlSettings())
+    override val radioControlSettings: StateFlow<RadioControlSettings> = _radioControlSettings
+
+    override fun updateRadioControlSettings(settings: RadioControlSettings) {
+        preferences.edit {
+            putBoolean(keyRadioControlEnabled, settings.enabled)
+            putString(keyRadioModel, settings.radioModel)
+            putString(keyTxRadioAddress, settings.txRadioAddress)
+            putString(keyRxRadioAddress, settings.rxRadioAddress)
+            putString(keyTxRadioName, settings.txRadioName)
+            putString(keyRxRadioName, settings.rxRadioName)
+            putInt(keyRadioBaudRate, settings.baudRate)
+        }
+        _radioControlSettings.value = settings
+    }
+
+    private fun getRadioControlSettings(): RadioControlSettings = RadioControlSettings(
+        enabled = preferences.getBoolean(keyRadioControlEnabled, false),
+        radioModel = preferences.getString(keyRadioModel, null) ?: "Yaesu FT-817/818",
+        txRadioAddress = preferences.getString(keyTxRadioAddress, null) ?: "",
+        rxRadioAddress = preferences.getString(keyRxRadioAddress, null) ?: "",
+        txRadioName = preferences.getString(keyTxRadioName, null) ?: "TX Radio",
+        rxRadioName = preferences.getString(keyRxRadioName, null) ?: "RX Radio",
+        baudRate = preferences.getInt(keyRadioBaudRate, 4800)
+    )
+    //endregion
 }

core/data/src/test/java/com/rtbishop/look4sat/core/data/Ft817CatProtocolTest.kt

@@ -0,0 +1,149 @@
+package com.rtbishop.look4sat.core.data
+
+import com.rtbishop.look4sat.core.data.framework.Ft817CatProtocol
+import org.junit.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+import kotlin.test.assertNotNull
+import kotlin.test.assertNull
+
+class Ft817CatProtocolTest {
+
+    @Test
+    fun encodeFrequencyBcd_145500000() {
+        val bcd = Ft817CatProtocol.encodeFrequencyBcd(145500000L)
+        assertContentEquals(byteArrayOf(0x14, 0x55, 0x00, 0x00), bcd)
+    }
+
+    @Test
+    fun encodeFrequencyBcd_435100000() {
+        val bcd = Ft817CatProtocol.encodeFrequencyBcd(435100000L)
+        assertContentEquals(byteArrayOf(0x43, 0x51, 0x00, 0x00), bcd)
+    }
+
+    @Test
+    fun encodeFrequencyBcd_7074000() {
+        val bcd = Ft817CatProtocol.encodeFrequencyBcd(7074000L)
+        assertContentEquals(byteArrayOf(0x00, 0x70, 0x74, 0x00), bcd)
+    }
+
+    @Test
+    fun decodeFrequencyBcd_roundTrips() {
+        val testFreqs = listOf(145500000L, 435100000L, 7074000L, 14200000L, 28500000L)
+        for (freq in testFreqs) {
+            val rounded = (freq / 10) * 10
+            val bcd = Ft817CatProtocol.encodeFrequencyBcd(freq)
+            assertEquals(rounded, Ft817CatProtocol.decodeFrequencyBcd(bcd))
+        }
+    }
+
+    @Test
+    fun buildSetFreqCommand_correctFormat() {
+        val cmd = Ft817CatProtocol.buildSetFreqCommand(145500000L)
+        assertEquals(5, cmd.size)
+        assertEquals(0x01.toByte(), cmd[4])
+        assertContentEquals(byteArrayOf(0x14, 0x55, 0x00, 0x00, 0x01), cmd)
+    }
+
+    @Test
+    fun buildSetModeCommand_usb() {
+        val cmd = Ft817CatProtocol.buildSetModeCommand("USB")
+        assertNotNull(cmd)
+        assertContentEquals(byteArrayOf(0x01, 0x00, 0x00, 0x00, 0x07), cmd)
+    }
+
+    @Test
+    fun buildSetModeCommand_fm() {
+        val cmd = Ft817CatProtocol.buildSetModeCommand("FM")
+        assertNotNull(cmd)
+        assertContentEquals(byteArrayOf(0x08, 0x00, 0x00, 0x00, 0x07), cmd)
+    }
+
+    @Test
+    fun buildSetModeCommand_unknownReturnsNull() {
+        assertNull(Ft817CatProtocol.buildSetModeCommand("INVALID"))
+    }
+
+    @Test
+    fun encodeCtcssTone_67_0() {
+        val bcd = Ft817CatProtocol.encodeCtcssToneBcd(67.0)
+        assertContentEquals(byteArrayOf(0x06, 0x70), bcd)
+    }
+
+    @Test
+    fun encodeCtcssTone_74_4() {
+        val bcd = Ft817CatProtocol.encodeCtcssToneBcd(74.4)
+        assertContentEquals(byteArrayOf(0x07, 0x44), bcd)
+    }
+
+    @Test
+    fun encodeCtcssTone_141_3() {
+        val bcd = Ft817CatProtocol.encodeCtcssToneBcd(141.3)
+        assertContentEquals(byteArrayOf(0x14, 0x13), bcd)
+    }
+
+    @Test
+    fun buildSetCtcssToneCommand_correctFormat() {
+        val cmd = Ft817CatProtocol.buildSetCtcssToneCommand(67.0)
+        assertEquals(5, cmd.size)
+        assertEquals(0x0B.toByte(), cmd[4])
+        assertContentEquals(byteArrayOf(0x06, 0x70, 0x00, 0x00, 0x0B), cmd)
+    }
+
+    @Test
+    fun buildCtcssModeCommand_enable() {
+        val cmd = Ft817CatProtocol.buildCtcssModeCommand(true)
+        assertContentEquals(byteArrayOf(0x2A, 0x00, 0x00, 0x00, 0x0A), cmd)
+    }
+
+    @Test
+    fun buildCtcssModeCommand_disable() {
+        val cmd = Ft817CatProtocol.buildCtcssModeCommand(false)
+        assertEquals(0x8A.toByte(), cmd[0])
+        assertEquals(0x0A.toByte(), cmd[4])
+    }
+
+    @Test
+    fun parseReadResponse_validResponse() {
+        val response = byteArrayOf(0x14, 0x55, 0x00, 0x00, 0x01)
+        val result = Ft817CatProtocol.parseReadResponse(response)
+        assertNotNull(result)
+        assertEquals(145500000L, result.first)
+        assertEquals("USB", result.second)
+    }
+
+    @Test
+    fun parseReadResponse_fmMode() {
+        val response = byteArrayOf(0x14, 0x60, 0x00, 0x00, 0x08)
+        val result = Ft817CatProtocol.parseReadResponse(response)
+        assertNotNull(result)
+        assertEquals(146000000L, result.first)
+        assertEquals("FM", result.second)
+    }
+
+    @Test
+    fun parseReadResponse_tooShort() {
+        assertNull(Ft817CatProtocol.parseReadResponse(byteArrayOf(0x14, 0x55, 0x00)))
+    }
+
+    @Test
+    fun parseReadResponse_unknownMode() {
+        val response = byteArrayOf(0x14, 0x55, 0x00, 0x00, 0x0F)
+        assertNull(Ft817CatProtocol.parseReadResponse(response))
+    }
+
+    @Test
+    fun buildPttCommands() {
+        val on = Ft817CatProtocol.buildPttOnCommand()
+        assertContentEquals(byteArrayOf(0x00, 0x00, 0x00, 0x00, 0x08), on)
+
+        val off = Ft817CatProtocol.buildPttOffCommand()
+        assertEquals(0x88.toByte(), off[4])
+    }
+
+    @Test
+    fun buildReadCommand() {
+        val cmd = Ft817CatProtocol.buildReadFreqModeCommand()
+        assertContentEquals(byteArrayOf(0x00, 0x00, 0x00, 0x00, 0x03), cmd)
+    }
+}

core/domain/build.gradle.kts

@@ -1,3 +1,3 @@
 plugins {
-    alias(libs.plugins.convention.kotlinLibraryPlugin)
+    alias(libs.plugins.convention.coreDomainPlugin)
 }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/model/Settings.kt

@@ -63,3 +63,20 @@ data class DataSourcesSettings(
     val tleUrl: String,
     val transceiversUrl: String
 )
+
+data class RadioControlSettings(
+    val enabled: Boolean,
+    val radioModel: String,
+    val txRadioAddress: String,
+    val rxRadioAddress: String,
+    val txRadioName: String,
+    val rxRadioName: String,
+    val baudRate: Int
+) {
+    companion object {
+        val SUPPORTED_RADIOS = listOf(
+            "Yaesu FT-817/818",
+            "Yaesu FT-857/897"
+        )
+    }
+}

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/predict/DeepSpaceObject.kt

@@ -97,40 +97,38 @@ class DeepSpaceObject(data: OrbitalData) : OrbitalObject(data) {
     }
 
     internal fun calculateSDP4(tSince: Double) {
-        synchronized(this) {
-            val temp = DoubleArray(12)
-            val xmdf = data.xmo + dsv.xmdot * tSince
-            val tsq = tSince * tSince
-            val templ = t2cof * tsq
-            dsv.xll = xmdf + dsv.xnodp * templ
-            dsv.omgadf = data.omegao + dsv.omgdot * tSince
-            val xnoddf = data.xnodeo + dsv.xnodot * tSince
-            dsv.xnode = xnoddf + xnodcf * tsq
-            val tempa = 1.0 - c1 * tSince
-            val tempe = data.bstar * c4 * tSince
-            dsv.xn = dsv.xnodp
-            dsv.t = tSince
-            deep.dpsec(data)
-            val a = (XKE / dsv.xn).pow(TWO_THIRDS) * tempa * tempa
-            dsv.em -= tempe
-            deep.dpper()
-            val xl = dsv.xll + dsv.omgadf + dsv.xnode
-            val beta = sqrt(1.0 - dsv.em * dsv.em)
-            dsv.xn = XKE / a.pow(1.5)
-            // Long period periodics
-            val axn = dsv.em * cos(dsv.omgadf)
-            temp[0] = invert(a * beta * beta)
-            val xll = temp[0] * xlcof * axn
-            val aynl = temp[0] * aycof
-            val xlt = xl + xll
-            val ayn = dsv.em * sin(dsv.omgadf) + aynl
-            // Solve Kepler's equation
-            val capu = mod2PI(xlt - dsv.xnode)
-            temp[2] = capu
-            converge(temp, axn, ayn, capu)
-            calculatePosAndVel(temp, a, axn, ayn)
-            calculatePhase(xlt, dsv.xnode, dsv.omgadf)
-        }
+        val temp = DoubleArray(12)
+        val xmdf = data.xmo + dsv.xmdot * tSince
+        val tsq = tSince * tSince
+        val templ = t2cof * tsq
+        dsv.xll = xmdf + dsv.xnodp * templ
+        dsv.omgadf = data.omegao + dsv.omgdot * tSince
+        val xnoddf = data.xnodeo + dsv.xnodot * tSince
+        dsv.xnode = xnoddf + xnodcf * tsq
+        val tempa = 1.0 - c1 * tSince
+        val tempe = data.bstar * c4 * tSince
+        dsv.xn = dsv.xnodp
+        dsv.t = tSince
+        deep.dpsec(data)
+        val a = (XKE / dsv.xn).pow(TWO_THIRDS) * tempa * tempa
+        dsv.em -= tempe
+        deep.dpper()
+        val xl = dsv.xll + dsv.omgadf + dsv.xnode
+        val beta = sqrt(1.0 - dsv.em * dsv.em)
+        dsv.xn = XKE / a.pow(1.5)
+        // Long period periodics
+        val axn = dsv.em * cos(dsv.omgadf)
+        temp[0] = invert(a * beta * beta)
+        val xll = temp[0] * xlcof * axn
+        val aynl = temp[0] * aycof
+        val xlt = xl + xll
+        val ayn = dsv.em * sin(dsv.omgadf) + aynl
+        // Solve Kepler's equation
+        val capu = mod2PI(xlt - dsv.xnode)
+        temp[2] = capu
+        converge(temp, axn, ayn, capu)
+        calculatePosAndVel(temp, a, axn, ayn)
+        calculatePhase(xlt, dsv.xnode, dsv.omgadf)
     }
 
     private fun calculatePosAndVel(temp: DoubleArray, a: Double, axn: Double, ayn: Double) {

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/predict/NearEarthObject.kt

@@ -141,53 +141,51 @@ class NearEarthObject(data: OrbitalData) : OrbitalObject(data) {
     }
 
     internal fun calculateSGP4(tSince: Double) {
-        synchronized(this) {
-            val temp = DoubleArray(9)
-            val xmdf = data.xmo + xmdot * tSince
-            val omgadf = data.omegao + omgdot * tSince
-            val xnoddf = data.xnodeo + xnodot * tSince
-            var omega = omgadf
-            var xmp = xmdf
-            val tsq = sqr(tSince)
-            val xnode = xnoddf + xnodcf * tsq
-            val bstar = data.bstar
-            var tempa = 1.0 - c1 * tSince
-            var tempe = bstar * c4 * tSince
-            var templ = t2cof * tsq
-            if (!sgp4Simple) {
-                val delomg = omgcof * tSince
-                val delm = xmcof * ((1.0 + eta * cos(xmdf)).pow(3.0) - delmo)
-                temp[0] = delomg + delm
-                xmp = xmdf + temp[0]
-                omega = omgadf - temp[0]
-                val tcube = tsq * tSince
-                val tfour = tSince * tcube
-                tempa = tempa - d2 * tsq - d3 * tcube - d4 * tfour
-                tempe += bstar * c5 * (sin(xmp) - sinmo)
-                templ += t3cof * tcube + tfour * (t4cof + tSince * t5cof)
-            }
-            val a = aodp * tempa.pow(2.0)
-            val eo = data.eccn
-            val e = eo - tempe
-            val xl = xmp + omega + xnode + xnodp * templ
-            val beta = sqrt(1.0 - e * e)
-            val xn = XKE / a.pow(1.5)
-
-            // Long period periodics
-            val axn = e * cos(omega)
-            temp[0] = invert(a * sqr(beta))
-            val xll = temp[0] * xlcof * axn
-            val aynl = temp[0] * aycof
-            val xlt = xl + xll
-            val ayn = e * sin(omega) + aynl
-
-            // Solve Kepler's equation
-            val capu = mod2PI(xlt - xnode)
-            temp[2] = capu
-            converge(temp, axn, ayn, capu)
-            calculatePosAndVel(temp, xnode, a, xn, axn, ayn)
-            calculatePhase(xlt, xnode, omgadf)
+        val temp = DoubleArray(9)
+        val xmdf = data.xmo + xmdot * tSince
+        val omgadf = data.omegao + omgdot * tSince
+        val xnoddf = data.xnodeo + xnodot * tSince
+        var omega = omgadf
+        var xmp = xmdf
+        val tsq = tSince * tSince
+        val xnode = xnoddf + xnodcf * tsq
+        val bstar = data.bstar
+        var tempa = 1.0 - c1 * tSince
+        var tempe = bstar * c4 * tSince
+        var templ = t2cof * tsq
+        if (!sgp4Simple) {
+            val delomg = omgcof * tSince
+            val delm = xmcof * ((1.0 + eta * cos(xmdf)).pow(3.0) - delmo)
+            temp[0] = delomg + delm
+            xmp = xmdf + temp[0]
+            omega = omgadf - temp[0]
+            val tcube = tsq * tSince
+            val tfour = tSince * tcube
+            tempa = tempa - d2 * tsq - d3 * tcube - d4 * tfour
+            tempe += bstar * c5 * (sin(xmp) - sinmo)
+            templ += t3cof * tcube + tfour * (t4cof + tSince * t5cof)
         }
+        val a = aodp * tempa * tempa
+        val eo = data.eccn
+        val e = eo - tempe
+        val xl = xmp + omega + xnode + xnodp * templ
+        val beta = sqrt(1.0 - e * e)
+        val xn = XKE / a.pow(1.5)
+
+        // Long period periodics
+        val axn = e * cos(omega)
+        temp[0] = invert(a * sqr(beta))
+        val xll = temp[0] * xlcof * axn
+        val aynl = temp[0] * aycof
+        val xlt = xl + xll
+        val ayn = e * sin(omega) + aynl
+
+        // Solve Kepler's equation
+        val capu = mod2PI(xlt - xnode)
+        temp[2] = capu
+        converge(temp, axn, ayn, capu)
+        calculatePosAndVel(temp, xnode, a, xn, axn, ayn)
+        calculatePhase(xlt, xnode, omgadf)
     }
 
     private fun calculatePosAndVel(

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/predict/OrbitalObject.kt

@@ -42,6 +42,27 @@ abstract class OrbitalObject(val data: OrbitalData) {
     var qoms24 = 0.0
     var s4 = 0.0
 
+    // Pre-allocated reusable vectors to avoid GC pressure in hot loops
+    private val obsPos = Vector4()
+    private val obsVel = Vector4()
+    private val rangeVector = Vector4()
+    private val rgvelVector = Vector4()
+    private val squintVector = Vector4()
+
+    // Cached observer position data to avoid recalculation when observer hasn't moved
+    private var cachedGsLat = Double.NaN
+    private var cachedGsLon = Double.NaN
+    private var cachedGsAlt = Double.NaN
+    private var cachedSinLat = 0.0
+    private var cachedCosLat = 0.0
+    private var cachedObsC = 0.0
+    private var cachedObsSq = 0.0
+    private var cachedObsAchFactor = 0.0
+    private var cachedObsZFactor = 0.0
+
+    // Cache for julian epoch to avoid recomputing every call
+    private val julEpoch: Double = juliandDateOfEpoch(data.epoch)
+
     fun willBeSeen(pos: GeoPos): Boolean {
         return if (data.meanmo < 1e-8) false
         else {
@@ -57,15 +78,13 @@ abstract class OrbitalObject(val data: OrbitalData) {
         orbitalPos = OrbitalPos()
         // Date/time at which the position and velocity were calculated
         julUTC = calcCurrentDaynum(time) + 2444238.5
-        // Convert satellite's epoch time to Julian and calculate time since epoch in minutes
-        val julEpoch = juliandDateOfEpoch(data.epoch)
+        // Calculate time since epoch in minutes
         val tsince = (julUTC - julEpoch) * MIN_PER_DAY
         calculateSDP4orSGP4(tsince)
         // Scale position and velocity vectors to km and km/sec
         convertSatState(position, velocity)
         // Calculate velocity of satellite
         magnitude(velocity)
-        val squintVector = Vector4()
         // Angles in rads, dist in km, vel in km/S. Calculate sat Az, El, Range and Range-rate.
         calculateObs(julUTC, position, velocity, pos, squintVector)
         calculateLatLonAlt(julUTC)
@@ -75,6 +94,38 @@ abstract class OrbitalObject(val data: OrbitalData) {
         return orbitalPos
     }
 
+    /**
+     * Lightweight elevation-only check for pass finding. Avoids full lat/lon/alt,
+     * eclipse, and squint calculations that aren't needed when just searching for
+     * horizon crossings.
+     */
+    fun getElevation(pos: GeoPos, time: Long): Double {
+        julUTC = calcCurrentDaynum(time) + 2444238.5
+        val tsince = (julUTC - julEpoch) * MIN_PER_DAY
+        calculateSDP4orSGP4(tsince)
+        convertSatState(position, velocity)
+        magnitude(velocity)
+        calculateObs(julUTC, position, velocity, pos, squintVector)
+        return orbitalPos.elevation
+    }
+
+    /**
+     * Full position calculation that also populates azimuth, altitude, etc.
+     * Used when we need all fields (AOS/LOS refinement, track computation).
+     */
+    fun getFullPosition(pos: GeoPos, time: Long): OrbitalPos {
+        orbitalPos = OrbitalPos()
+        julUTC = calcCurrentDaynum(time) + 2444238.5
+        val tsince = (julUTC - julEpoch) * MIN_PER_DAY
+        calculateSDP4orSGP4(tsince)
+        convertSatState(position, velocity)
+        magnitude(velocity)
+        calculateObs(julUTC, position, velocity, pos, squintVector)
+        calculateLatLonAlt(julUTC)
+        orbitalPos.time = time
+        return orbitalPos
+    }
+
     private fun calcCurrentDaynum(now: Long): Double {
         val then = 315446400000 // time in millis on 31Dec79 00:00:00 UTC (daynum 0)
         return (now - then) / 1000.0 / 60.0 / 60.0 / 24.0
@@ -117,38 +168,34 @@ abstract class OrbitalObject(val data: OrbitalData) {
         gsPos: GeoPos,
         squintVector: Vector4
     ) {
-        val obsPos = Vector4()
-        val obsVel = Vector4()
-        val range = Vector4()
-        val rgvel = Vector4()
         calculateUserPosVel(julianUTC, gsPos, obsPos, obsVel)
-        range.setXYZ(
+        rangeVector.setXYZ(
             positionVector.x - obsPos.x,
             positionVector.y - obsPos.y,
             positionVector.z - obsPos.z
         )
         // Save these values globally for calculating squint angles later
-        squintVector.setXYZ(range.x, range.y, range.z)
-        rgvel.setXYZ(
+        squintVector.setXYZ(rangeVector.x, rangeVector.y, rangeVector.z)
+        rgvelVector.setXYZ(
             velocityVector.x - obsVel.x,
             velocityVector.y - obsVel.y,
             velocityVector.z - obsVel.z
         )
-        magnitude(range)
-        val sinLat = sin(DEG2RAD * gsPos.latitude)
-        val cosLat = cos(DEG2RAD * gsPos.latitude)
+        magnitude(rangeVector)
+        val sinLat = cachedSinLat
+        val cosLat = cachedCosLat
         val sinTheta = sin(gsPosTheta)
         val cosTheta = cos(gsPosTheta)
-        val topS = sinLat * cosTheta * range.x + sinLat * sinTheta * range.y - cosLat * range.z
-        val topE = -sinTheta * range.x + cosTheta * range.y
-        val topZ = cosLat * cosTheta * range.x + cosLat * sinTheta * range.y + sinLat * range.z
+        val topS = sinLat * cosTheta * rangeVector.x + sinLat * sinTheta * rangeVector.y - cosLat * rangeVector.z
+        val topE = -sinTheta * rangeVector.x + cosTheta * rangeVector.y
+        val topZ = cosLat * cosTheta * rangeVector.x + cosLat * sinTheta * rangeVector.y + sinLat * rangeVector.z
         var azim = atan(-topE / topS)
         if (topS > 0.0) azim += PI
         if (azim < 0.0) azim += TWO_PI
         orbitalPos.azimuth = azim
-        orbitalPos.elevation = asin(topZ / range.w)
-        orbitalPos.distance = range.w
-        orbitalPos.distanceRate = dot(range, rgvel) / range.w
+        orbitalPos.elevation = asin(topZ / rangeVector.w)
+        orbitalPos.distance = rangeVector.w
+        orbitalPos.distanceRate = dot(rangeVector, rgvelVector) / rangeVector.w
         var elevation = orbitalPos.elevation / TWO_PI * 360.0
         if (elevation > 90) elevation = 180 - elevation
         orbitalPos.aboveHorizon = elevation - 0 > EPSILON
@@ -163,12 +210,24 @@ abstract class OrbitalObject(val data: OrbitalData) {
     ) {
         val mFactor = 7.292115E-5
         gsPosTheta = mod2PI(thetaGJD(time) + DEG2RAD * gsPos.longitude)
-        val c = invert(sqrt(1.0 + FLAT_FACT * (FLAT_FACT - 2) * sqr(sin(DEG2RAD * gsPos.latitude))))
-        val sq = sqr(1.0 - FLAT_FACT) * c
-        val achcp = (EARTH_RADIUS * c + gsPos.altitude / 1000.0) * cos(DEG2RAD * gsPos.latitude)
+
+        // Cache trig and position factors when observer position changes
+        if (gsPos.latitude != cachedGsLat || gsPos.longitude != cachedGsLon || gsPos.altitude != cachedGsAlt) {
+            cachedGsLat = gsPos.latitude
+            cachedGsLon = gsPos.longitude
+            cachedGsAlt = gsPos.altitude
+            cachedSinLat = sin(DEG2RAD * gsPos.latitude)
+            cachedCosLat = cos(DEG2RAD * gsPos.latitude)
+            cachedObsC = invert(sqrt(1.0 + FLAT_FACT * (FLAT_FACT - 2) * sqr(cachedSinLat)))
+            cachedObsSq = sqr(1.0 - FLAT_FACT) * cachedObsC
+            cachedObsAchFactor = (EARTH_RADIUS * cachedObsC + gsPos.altitude / 1000.0) * cachedCosLat
+            cachedObsZFactor = (EARTH_RADIUS * cachedObsSq + gsPos.altitude / 1000.0) * cachedSinLat
+        }
+
         obsPos.setXYZ(
-            achcp * cos(gsPosTheta), achcp * sin(gsPosTheta),
-            (EARTH_RADIUS * sq + gsPos.altitude / 1000.0) * sin(DEG2RAD * gsPos.latitude)
+            cachedObsAchFactor * cos(gsPosTheta),
+            cachedObsAchFactor * sin(gsPosTheta),
+            cachedObsZFactor
         )
         obsVel.setXYZ(-mFactor * obsPos.y, mFactor * obsPos.x, 0.0)
         magnitude(obsPos)
@@ -368,7 +427,7 @@ abstract class OrbitalObject(val data: OrbitalData) {
      * The function Delta_ET has been added to allow calculations on the
      * position of the sun. It provides the difference between UT (approximately
      * the same as UTC) and ET (now referred to as TDT) This function is based
-     * on a least squares fit of data from 1950 to 1991 and will need to be
+     * on the least squares fit of data from 1950 to 1991 and will need to be
      * updated periodically.
      *
      * Values determined using data from 1950-1991 in the 1990 Astronomical

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/predict/OrbitalPass.kt

@@ -25,7 +25,7 @@ data class OrbitalPass(
     val altitude: Int = 1000,
     val maxElevation: Double = 75.0,
     val orbitalObject: OrbitalObject,
-    var progress: Float = 0.0f
+    val progress: Float = 0.0f
 ) {
     val catNum: Int = orbitalObject.data.catnum
     val name: String = orbitalObject.data.name

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/predict/OrbitalPos.kt

@@ -21,7 +21,6 @@ import kotlin.math.acos
 import kotlin.math.asin
 import kotlin.math.atan2
 import kotlin.math.cos
-import kotlin.math.pow
 import kotlin.math.sin
 import kotlin.math.sqrt
 
@@ -50,23 +49,32 @@ data class OrbitalPos(
     }
 
     fun getOrbitalVelocity(): Double {
-        val earthG = 6.674 * 10.0.pow(-11)
-        val earthM = 5.98 * 10.0.pow(24)
-        val radius = 6.37 * 10.0.pow(6) + altitude * 10.0.pow(3)
-        return sqrt(earthG * earthM / radius) / 1000
+        val radius = EARTH_RADIUS_M + altitude * 1000.0
+        return sqrt(GM_EARTH / radius) / 1000.0
     }
 
     fun getRangeCircle(): List<GeoPos> {
-        val rangeCirclePoints = mutableListOf<GeoPos>()
-        val beta = acos(EARTH_RADIUS / (EARTH_RADIUS + altitude)) // * EARTH_RADIUS = radiusKm
+        val pointCount = 721
+        val rangeCirclePoints = ArrayList<GeoPos>(pointCount)
+        val beta = acos(EARTH_RADIUS / (EARTH_RADIUS + altitude))
+        val sinLat = sin(latitude)
+        val cosLat = cos(latitude)
+        val cosBeta = cos(beta)
+        val sinBeta = sin(beta)
         for (azimuth in 0..720) {
             val rads = azimuth * DEG2RAD
-            val lat = asin(sin(latitude) * cos(beta) + (cos(latitude) * sin(beta) * cos(rads)))
-            val lon = (longitude + atan2(
-                sin(rads) * sin(beta) * cos(latitude), cos(beta) - sin(latitude) * sin(lat)
-            ))
+            val sinRads = sin(rads)
+            val cosRads = cos(rads)
+            val lat = asin(sinLat * cosBeta + cosLat * sinBeta * cosRads)
+            val lon = longitude + atan2(sinRads * sinBeta * cosLat, cosBeta - sinLat * sin(lat))
             rangeCirclePoints.add(GeoPos(lat * RAD2DEG, lon * RAD2DEG))
         }
         return rangeCirclePoints
     }
+
+    companion object {
+        // Pre-computed constants for orbital velocity calculation
+        private const val GM_EARTH = 3.986004418E14 // m^3/s^2
+        private const val EARTH_RADIUS_M = 6.37E6 // meters
+    }
 }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/IMainContainer.kt

@@ -12,9 +12,12 @@ interface IMainContainer {
     val databaseRepo: IDatabaseRepo
     fun provideAddToCalendar(): IAddToCalendar
     fun provideShowToast(): IShowToast
-    fun provideBluetoothReporter(): IReporterRepo<WithoutExtParams>
-    fun provideNetworkReporter(): IReporterRepo<ExtendedParams>
+    fun provideBluetoothReporter(): IReporter
+    fun provideNetworkReporter(): IReporter
     fun provideSensorsRepo(): ISensorsRepo
+    fun provideTxRadioController(): IRadioController
+    fun provideRxRadioController(): IRadioController
+    val radioTrackingService: IRadioTrackingService
 }
 
 interface IContainerProvider {

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/IRadioController.kt

@@ -0,0 +1,41 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.core.domain.repository
+
+interface IRadioController {
+
+    val isConnected: Boolean
+
+    suspend fun connect(): Boolean
+
+    suspend fun disconnect()
+
+    suspend fun setFrequency(frequencyHz: Long): Boolean
+
+    suspend fun setMode(mode: String): Boolean
+
+    suspend fun setCtcssMode(enabled: Boolean): Boolean
+
+    suspend fun setCtcssTone(toneHz: Double): Boolean
+
+    suspend fun readFrequencyAndMode(): Pair<Long, String>?
+
+    suspend fun pttOn(): Boolean
+
+    suspend fun pttOff(): Boolean
+}

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/IRadioTrackingService.kt

@@ -0,0 +1,55 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.core.domain.repository
+
+import com.rtbishop.look4sat.core.domain.model.SatRadio
+import com.rtbishop.look4sat.core.domain.predict.OrbitalObject
+import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
+import kotlinx.coroutines.flow.StateFlow
+
+data class RadioTrackingState(
+    val isActive: Boolean = false,
+    val txConnected: Boolean = false,
+    val rxConnected: Boolean = false,
+    val txFrequencyHz: Long? = null,
+    val rxFrequencyHz: Long? = null,
+    val txMode: String? = null,
+    val rxMode: String? = null,
+    val ctcssTone: Double? = null,
+    val txBaseFrequencyHz: Long? = null,
+    val selectedTransponder: SatRadio? = null,
+    val currentPass: OrbitalPass? = null,
+    val azimuth: Double = 0.0,
+    val elevation: Double = 0.0,
+    val distance: Double = 0.0,
+    val errorMessage: String? = null
+)
+
+interface IRadioTrackingService {
+    val state: StateFlow<RadioTrackingState>
+
+    suspend fun connectRadios()
+    suspend fun disconnectRadios()
+    fun startTracking(pass: OrbitalPass, transponder: SatRadio, txBaseFreqHz: Long?)
+    fun stopTracking()
+    fun setTransponder(transponder: SatRadio)
+    fun setTxBaseFrequency(frequencyHz: Long)
+    fun adjustTxBaseFrequency(deltaHz: Long)
+    fun setCtcssTone(toneHz: Double?)
+    fun setMode(txMode: String, rxMode: String)
+}

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/IReporterRepo.kt

@@ -17,18 +17,7 @@
  */
 package com.rtbishop.look4sat.core.domain.repository
 
-interface IReporterParams
-
-interface IReporterRepo<T : IReporterParams> {
-    fun isConnected(service: BtService): Boolean
-    fun isConnecting(service: BtService): Boolean
-    fun connect(service: BtService, deviceId: String)
-    fun reportRotation(format: String, azimuth: Double, elevation: Double, params: T)
-    fun reportFrequency(format: String, frequency: Long, params: T)
+interface IReporter {
+    fun reportRotation(format: String, azimuth: Double, elevation: Double)
+    fun reportFrequency(format: String, frequency: Long)
 }
-
-data class ExtendedParams(val server: String, val port: Int) : IReporterParams
-
-data class WithoutExtParams(val dummy: Int) : IReporterParams
-
-enum class BtService { ROTATOR, FREQUENCY }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/ISatelliteRepo.kt

@@ -25,13 +25,27 @@ import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
 import kotlinx.coroutines.flow.StateFlow
 
 interface ISatelliteRepo {
-    val passes: StateFlow<List<OrbitalPass>>
+    /** All selected OrbitalObjects, updated when the selection changes. */
     val satellites: StateFlow<List<OrbitalObject>>
-    suspend fun getRadiosWithId(id: Int): List<SatRadio>
+
+    /** Raw calculated passes (without live progress). Updated on selection/filter change. */
+    val passes: StateFlow<List<OrbitalPass>>
+
+    /** Load satellite objects from DB based on the current selection. */
     suspend fun initRepository()
-    suspend fun getPosition(sat: OrbitalObject, pos: GeoPos, time: Long): OrbitalPos
-    suspend fun getTrack(sat: OrbitalObject, pos: GeoPos, start: Long, end: Long): List<OrbitalPos>
-    suspend fun getRadios(sat: OrbitalObject, pos: GeoPos, radios: List<SatRadio>, time: Long): List<SatRadio>
-    suspend fun processPasses(passList: List<OrbitalPass>, time: Long): List<OrbitalPass>
+
+    /** Recalculate passes with the given filter parameters. */
     suspend fun calculatePasses(time: Long, hoursAhead: Int, minElevation: Double, modes: List<String>)
+
+    /** Get the current position of a single satellite. */
+    suspend fun getPosition(sat: OrbitalObject, pos: GeoPos, time: Long): OrbitalPos
+
+    /** Get the ground track for a satellite over a time range. */
+    suspend fun getTrack(sat: OrbitalObject, pos: GeoPos, start: Long, end: Long): List<OrbitalPos>
+
+    /** Get Doppler-shifted radio frequencies for a satellite at the given time. */
+    suspend fun getRadios(sat: OrbitalObject, pos: GeoPos, radios: List<SatRadio>, time: Long): List<SatRadio>
+
+    /** Fetch radio transceivers for a satellite by its catalog number. */
+    suspend fun getRadiosWithId(id: Int): List<SatRadio>
 }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/ISettingsRepo.kt

@@ -22,6 +22,7 @@ import com.rtbishop.look4sat.core.domain.model.DatabaseState
 import com.rtbishop.look4sat.core.domain.model.OtherSettings
 import com.rtbishop.look4sat.core.domain.model.PassesSettings
 import com.rtbishop.look4sat.core.domain.model.RCSettings
+import com.rtbishop.look4sat.core.domain.model.RadioControlSettings
 import com.rtbishop.look4sat.core.domain.predict.GeoPos
 import kotlinx.coroutines.flow.StateFlow
 
@@ -57,39 +58,23 @@ interface ISettingsRepo {
 
     //region # RC settings
     val rcSettings: StateFlow<RCSettings>
-    fun setBluetoothRotatorAddress(value: String)
-    fun setBluetoothRotatorFormat(value: String)
-    fun setBluetoothRotatorName(value: String)
-    fun setBluetoothRotatorState(value: Boolean)
-    fun setBluetoothFrequencyAddress(value: String)
-    fun setBluetoothFrequencyFormat(value: String)
-    fun setBluetoothFrequencyState(value: Boolean)
-    fun setRotatorAddress(value: String)
-    fun setRotatorPort(value: String)
-    fun setRotatorState(value: Boolean)
-    fun setRotatorFormat(value: String)
-    fun setFrequencyAddress(value: String)
-    fun setFrequencyPort(value: String)
-    fun setFrequencyState(value: Boolean)
-    fun setFrequencyFormat(value: String)
+    fun updateRCSettings(settings: RCSettings)
     //endregion
 
     //region # Other settings
     val otherSettings: StateFlow<OtherSettings>
-    fun setStateOfAutoUpdate(value: Boolean)
-    fun setStateOfSensors(value: Boolean)
-    fun setStateOfSweep(value: Boolean)
-    fun setStateOfUtc(value: Boolean)
-    fun setStateOfLightTheme(value: Boolean)
-    fun setWarningDismissed()
-    fun setWhatsNewDismissed()
+    fun updateOtherSettings(transform: (OtherSettings) -> OtherSettings)
+    fun setWarningDismissed() = updateOtherSettings { it.copy(shouldSeeWarning = false) }
+    fun setWhatsNewDismissed() = updateOtherSettings { it.copy(shouldSeeWhatsNew = false) }
     //endregion
 
     //region # Transceivers settings
     val dataSourcesSettings: StateFlow<DataSourcesSettings>
-    fun setUseCustomTle(value: Boolean)
-    fun setUseCustomTransceivers(value: Boolean)
-    fun setTleUrl(value: String)
-    fun setTransceiversUrl(value: String)
+    fun updateDataSourcesSettings(settings: DataSourcesSettings)
+    //endregion
+
+    //region # Radio control settings
+    val radioControlSettings: StateFlow<RadioControlSettings>
+    fun updateRadioControlSettings(settings: RadioControlSettings)
     //endregion
 }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/utility/DataParser.kt

@@ -29,126 +29,94 @@ import kotlin.math.pow
 class DataParser(private val dispatcher: CoroutineDispatcher) {
 
     suspend fun parseCSVStream(stream: InputStream): List<OrbitalData> = withContext(dispatcher) {
-        val parsedItems = mutableListOf<OrbitalData>()
         stream.bufferedReader().useLines { lines ->
-            lines.forEachIndexed { index, line ->
-                if (index != 0) {
-                    val values = line.split(",")
-                    parseCSV(values)?.let { tle -> parsedItems.add(tle) }
-                }
-            }
+            lines.drop(1).mapNotNull { parseCSV(it.split(",")) }.toList()
         }
-        return@withContext parsedItems
     }
 
     suspend fun parseTLEStream(stream: InputStream): List<OrbitalData> = withContext(dispatcher) {
-        val tleStrings = mutableListOf(String(), String(), String())
-        val parsedItems = mutableListOf<OrbitalData>()
-        var lineIndex = 0
-        stream.bufferedReader().forEachLine { line ->
-            tleStrings[lineIndex] = line
-            if (lineIndex < 2) {
-                lineIndex++
-            } else {
-                val isLineOneValid = tleStrings[1].substring(0, 1) == "1"
-                val isLineTwoValid = tleStrings[2].substring(0, 1) == "2"
-                if (!isLineOneValid && !isLineTwoValid) return@forEachLine
-                parseTLE(tleStrings)?.let { tle -> parsedItems.add(tle) }
-                lineIndex = 0
-            }
-        }
-        return@withContext parsedItems
+        stream.bufferedReader().readLines()
+            .chunked(3)
+            .filter { it.size == 3 && it[1].startsWith("1") && it[2].startsWith("2") }
+            .mapNotNull { parseTLE(it) }
     }
 
     suspend fun parseJSONStream(stream: InputStream): List<SatRadio> = withContext(dispatcher) {
-        val parsedItems = mutableListOf<SatRadio>()
-        try {
+        runCatching {
             val jsonArray = JSONArray(stream.bufferedReader().readText())
-            for (index in 0 until jsonArray.length()) {
-                val jsonObject = jsonArray.getJSONObject(index)
-                parseJSON(jsonObject)?.let { parsedItems.add(it) }
-            }
-            return@withContext parsedItems
-        } catch (_: Exception) {
-            return@withContext parsedItems
-        }
+            (0 until jsonArray.length()).mapNotNull { parseJSON(jsonArray.getJSONObject(it)) }
+        }.getOrDefault(emptyList())
     }
 
-    fun isLeapYear(year: Int): Boolean {
-        return ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)
-    }
+    fun isLeapYear(year: Int): Boolean = (year % 4 == 0 && year % 100 != 0) || year % 400 == 0
 
-    private fun parseCSV(values: List<String>): OrbitalData? = try {
+    private fun parseCSV(values: List<String>): OrbitalData? = runCatching {
         val name = values[0]
-        val year = values[2].substring(0, 4)
-        val month = values[2].substring(5, 7)
-        val dayOfMonth = values[2].substring(8, 10)
-        val dayInt = getDayOfYear(year.toInt(), month.toInt(), dayOfMonth.toInt())
-        val day = if (dayInt < 10) "00$dayInt" else if (dayInt < 100) "0$dayInt" else "$dayInt"
-        val hour = values[2].substring(11, 13).toInt() * 3600000 // ms in one hour
-        val min = values[2].substring(14, 16).toInt() * 60000 // ms in one minute
-        val sec = values[2].substring(17, 19).toInt() * 1000 // ms in one second
-        val ms = values[2].substring(20, 26).toInt() / 1000.0 // microseconds to ms
-        val frac = ((hour + min + sec + ms) / 86400000.0).toString()
-        val epoch = "${year.substring(2)}$day${frac.substring(1)}".toDouble()
-        val meanmo = values[3].toDouble()
-        val eccn = values[4].toDouble()
-        val incl = values[5].toDouble()
-        val raan = values[6].toDouble()
-        val argper = values[7].toDouble()
-        val meanan = values[8].toDouble()
-        val catnum = values[11].toInt()
-        val bstar = values[14].toDouble()
-        OrbitalData(name, epoch, meanmo, eccn, incl, raan, argper, meanan, catnum, bstar)
-    } catch (exception: Exception) {
-        println("CSV parsing exception: $exception")
-        null
-    }
+        val timestamp = values[2]
+        val year = timestamp.substring(0, 4)
+        val month = timestamp.substring(5, 7).toInt()
+        val dayOfMonth = timestamp.substring(8, 10).toInt()
+        val dayInt = getDayOfYear(year.toInt(), month, dayOfMonth)
+        val day = dayInt.toString().padStart(3, '0')
+        val hour = timestamp.substring(11, 13).toInt() * 3600000
+        val min = timestamp.substring(14, 16).toInt() * 60000
+        val sec = timestamp.substring(17, 19).toInt() * 1000
+        val ms = timestamp.substring(20, 26).toInt() / 1000.0
+        val frac = ((hour + min + sec + ms) / 86400000.0).toString().substring(1)
+        val epoch = "${year.substring(2)}$day$frac".toDouble()
+        OrbitalData(
+            name = name,
+            epoch = epoch,
+            meanmo = values[3].toDouble(),
+            eccn = values[4].toDouble(),
+            incl = values[5].toDouble(),
+            raan = values[6].toDouble(),
+            argper = values[7].toDouble(),
+            meanan = values[8].toDouble(),
+            catnum = values[11].toInt(),
+            bstar = values[14].toDouble()
+        )
+    }.onFailure { println("CSV parsing exception: $it") }.getOrNull()
 
-    private fun parseTLE(tle: List<String>): OrbitalData? = try {
-        val name: String = tle[0].trim()
-        val epoch: Double = tle[1].substring(18, 32).toDouble()
-        val meanmo: Double = tle[2].substring(52, 63).toDouble()
-        val eccn: Double = tle[2].substring(26, 33).toDouble() / 10000000.0
-        val incl: Double = tle[2].substring(8, 16).toDouble()
-        val raan: Double = tle[2].substring(17, 25).toDouble()
-        val argper: Double = tle[2].substring(34, 42).toDouble()
-        val meanan: Double = tle[2].substring(43, 51).toDouble()
-        val catnum: Int = tle[1].substring(2, 7).trim().toInt()
-        val bstar: Double = 1.0e-5 * tle[1].substring(53, 59).toDouble() / 10.0.pow(tle[1].substring(60, 61).toDouble())
-        OrbitalData(name, epoch, meanmo, eccn, incl, raan, argper, meanan, catnum, bstar)
-    } catch (exception: Exception) {
-        println("TLE parsing exception: $exception")
-        null
-    }
+    private fun parseTLE(tle: List<String>): OrbitalData? = runCatching {
+        val line1 = tle[1]
+        val line2 = tle[2]
+        OrbitalData(
+            name = tle[0].trim(),
+            epoch = line1.substring(18, 32).toDouble(),
+            meanmo = line2.substring(52, 63).toDouble(),
+            eccn = line2.substring(26, 33).toDouble() / 1e7,
+            incl = line2.substring(8, 16).toDouble(),
+            raan = line2.substring(17, 25).toDouble(),
+            argper = line2.substring(34, 42).toDouble(),
+            meanan = line2.substring(43, 51).toDouble(),
+            catnum = line1.substring(2, 7).trim().toInt(),
+            bstar = 1e-5 * line1.substring(53, 59).toDouble() / 10.0.pow(line1.substring(60, 61).toDouble())
+        )
+    }.onFailure { println("TLE parsing exception: $it") }.getOrNull()
 
-    private fun parseJSON(json: JSONObject): SatRadio? = try {
-        val uuid = json.getString("uuid")
-        val info = json.getString("description")
-        val alive = json.getBoolean("alive")
-        val dlinkLow = if (json.isNull("downlink_low")) null else json.getLong("downlink_low")
-        val dlinkHigh = if (json.isNull("downlink_high")) null else json.getLong("downlink_high")
-        val dlinkMode = if (json.isNull("mode")) null else json.getString("mode")
-        val ulinkLow = if (json.isNull("uplink_low")) null else json.getLong("uplink_low")
-        val ulinkHigh = if (json.isNull("uplink_high")) null else json.getLong("uplink_high")
-        val ulinkMode = if (json.isNull("uplink_mode")) null else json.getString("uplink_mode")
-        val inverted = json.getBoolean("invert")
-        val catnum = if (json.isNull("norad_cat_id")) null else json.getInt("norad_cat_id")
-        SatRadio(uuid, info, alive, dlinkLow, dlinkHigh, dlinkMode, ulinkLow, ulinkHigh, ulinkMode, inverted, catnum)
-    } catch (exception: Exception) {
-        println("JSON parsing exception: $exception")
-        null
-    }
+    private fun parseJSON(json: JSONObject): SatRadio? = runCatching {
+        SatRadio(
+            uuid = json.getString("uuid"),
+            info = json.getString("description"),
+            isAlive = json.getBoolean("alive"),
+            downlinkLow = json.optLongOrNull("downlink_low"),
+            downlinkHigh = json.optLongOrNull("downlink_high"),
+            downlinkMode = json.optStringOrNull("mode"),
+            uplinkLow = json.optLongOrNull("uplink_low"),
+            uplinkHigh = json.optLongOrNull("uplink_high"),
+            uplinkMode = json.optStringOrNull("uplink_mode"),
+            isInverted = json.getBoolean("invert"),
+            catnum = json.optIntOrNull("norad_cat_id")
+        )
+    }.onFailure { println("JSON parsing exception: $it") }.getOrNull()
+
+    private fun JSONObject.optStringOrNull(key: String): String? = if (isNull(key)) null else getString(key)
+    private fun JSONObject.optLongOrNull(key: String): Long? = if (isNull(key)) null else getLong(key)
+    private fun JSONObject.optIntOrNull(key: String): Int? = if (isNull(key)) null else getInt(key)
 
     private fun getDayOfYear(year: Int, month: Int, dayOfMonth: Int): Int {
-        if (month == 1) return dayOfMonth
-        val daysArray = arrayOf(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31)
-        var dayOfYear = dayOfMonth
-        // If leap year increment Feb days
-        if (isLeapYear(year)) daysArray[1]++
-        for (i in 0 until month - 1) {
-            dayOfYear += daysArray[i]
-        }
-        return dayOfYear
+        val daysInMonth = intArrayOf(31, if (isLeapYear(year)) 29 else 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31)
+        return daysInMonth.take(month - 1).sum() + dayOfMonth
     }
 }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/utility/Extensions.kt

@@ -21,10 +21,11 @@ import java.util.Locale
 import java.util.concurrent.TimeUnit
 
 fun Long.toTimerString(): String {
+    val millis = coerceAtLeast(0L)
     val format = "%02d:%02d:%02d"
-    val hours = TimeUnit.MILLISECONDS.toHours(this)
-    val minutes = TimeUnit.MILLISECONDS.toMinutes(this) % 60
-    val seconds = TimeUnit.MILLISECONDS.toSeconds(this) % 60
+    val hours = TimeUnit.MILLISECONDS.toHours(millis)
+    val minutes = TimeUnit.MILLISECONDS.toMinutes(millis) % 60
+    val seconds = TimeUnit.MILLISECONDS.toSeconds(millis) % 60
     return String.format(Locale.ENGLISH, format, hours, minutes, seconds)
 }
 

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/utility/TransponderMapper.kt

@@ -0,0 +1,73 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.core.domain.utility
+
+import com.rtbishop.look4sat.core.domain.model.SatRadio
+
+object TransponderMapper {
+
+    fun mapUplinkToDownlink(txFreqHz: Long, transponder: SatRadio): Long? {
+        val uplinkLow = transponder.uplinkLow ?: return null
+        val downlinkLow = transponder.downlinkLow ?: return null
+
+        // Single-frequency transponder (FM repeater) - just return the downlink freq
+        val uplinkHigh = transponder.uplinkHigh
+        val downlinkHigh = transponder.downlinkHigh
+        if (uplinkHigh == null || downlinkHigh == null
+            || uplinkLow == uplinkHigh || downlinkLow == downlinkHigh
+        ) {
+            return downlinkLow
+        }
+
+        // Passband transponder (linear) - map within the band
+        val offset = txFreqHz - uplinkLow
+        return if (transponder.isInverted) {
+            downlinkHigh - offset
+        } else {
+            downlinkLow + offset
+        }
+    }
+
+    fun mapDownlinkToUplink(rxFreqHz: Long, transponder: SatRadio): Long? {
+        val uplinkLow = transponder.uplinkLow ?: return null
+        val downlinkLow = transponder.downlinkLow ?: return null
+
+        val uplinkHigh = transponder.uplinkHigh
+        val downlinkHigh = transponder.downlinkHigh
+        if (uplinkHigh == null || downlinkHigh == null
+            || uplinkLow == uplinkHigh || downlinkLow == downlinkHigh
+        ) {
+            return uplinkLow
+        }
+
+        return if (transponder.isInverted) {
+            uplinkLow + (downlinkHigh - rxFreqHz)
+        } else {
+            uplinkLow + (rxFreqHz - downlinkLow)
+        }
+    }
+
+    fun mapUplinkModeToDownlinkMode(txMode: String, isInverted: Boolean): String {
+        if (!isInverted) return txMode
+        return when (txMode.uppercase()) {
+            "USB" -> "LSB"
+            "LSB" -> "USB"
+            else -> txMode
+        }
+    }
+}

core/domain/src/test/java/com/rtbishop/look4sat/core/domain/TransponderMapperTest.kt

@@ -0,0 +1,91 @@
+package com.rtbishop.look4sat.core.domain
+
+import com.rtbishop.look4sat.core.domain.model.SatRadio
+import com.rtbishop.look4sat.core.domain.utility.TransponderMapper
+import org.junit.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNull
+
+class TransponderMapperTest {
+
+    private fun makeRadio(
+        uplinkLow: Long? = 435000000L,
+        uplinkHigh: Long? = 435100000L,
+        downlinkLow: Long? = 145800000L,
+        downlinkHigh: Long? = 145900000L,
+        isInverted: Boolean = true
+    ) = SatRadio(
+        uuid = "test",
+        info = "Test",
+        isAlive = true,
+        downlinkLow = downlinkLow,
+        downlinkHigh = downlinkHigh,
+        downlinkMode = "USB",
+        uplinkLow = uplinkLow,
+        uplinkHigh = uplinkHigh,
+        uplinkMode = "USB",
+        isInverted = isInverted,
+        catnum = 0
+    )
+
+    @Test
+    fun invertedTransponder_mapsFrequencyCorrectly() {
+        val radio = makeRadio(isInverted = true)
+        // TX at uplinkLow → RX should be downlinkHigh
+        assertEquals(145900000L, TransponderMapper.mapUplinkToDownlink(435000000L, radio))
+        // TX at uplinkHigh → RX should be downlinkLow
+        assertEquals(145800000L, TransponderMapper.mapUplinkToDownlink(435100000L, radio))
+        // TX at center → RX at center
+        assertEquals(145850000L, TransponderMapper.mapUplinkToDownlink(435050000L, radio))
+    }
+
+    @Test
+    fun nonInvertedTransponder_mapsFrequencyCorrectly() {
+        val radio = makeRadio(isInverted = false)
+        // TX at uplinkLow → RX should be downlinkLow
+        assertEquals(145800000L, TransponderMapper.mapUplinkToDownlink(435000000L, radio))
+        // TX at uplinkHigh → RX should be downlinkHigh
+        assertEquals(145900000L, TransponderMapper.mapUplinkToDownlink(435100000L, radio))
+    }
+
+    @Test
+    fun nullFrequencies_returnsNull() {
+        assertNull(TransponderMapper.mapUplinkToDownlink(435000000L, makeRadio(uplinkLow = null)))
+        assertNull(TransponderMapper.mapUplinkToDownlink(435000000L, makeRadio(downlinkLow = null)))
+    }
+
+    @Test
+    fun singleFrequencyTransponder_returnsDownlinkLow() {
+        // FM repeater style: no passband, just single frequencies
+        val radio = makeRadio(
+            uplinkLow = 145990000L, uplinkHigh = null,
+            downlinkLow = 436300000L, downlinkHigh = null,
+            isInverted = false
+        )
+        assertEquals(436300000L, TransponderMapper.mapUplinkToDownlink(145990000L, radio))
+    }
+
+    @Test
+    fun equalLowHighTransponder_returnsDownlinkLow() {
+        val radio = makeRadio(
+            uplinkLow = 145990000L, uplinkHigh = 145990000L,
+            downlinkLow = 436300000L, downlinkHigh = 436300000L,
+            isInverted = false
+        )
+        assertEquals(436300000L, TransponderMapper.mapUplinkToDownlink(145990000L, radio))
+    }
+
+    @Test
+    fun invertedMode_swapsUsbLsb() {
+        assertEquals("LSB", TransponderMapper.mapUplinkModeToDownlinkMode("USB", true))
+        assertEquals("USB", TransponderMapper.mapUplinkModeToDownlinkMode("LSB", true))
+        assertEquals("FM", TransponderMapper.mapUplinkModeToDownlinkMode("FM", true))
+    }
+
+    @Test
+    fun nonInvertedMode_keepsSame() {
+        assertEquals("USB", TransponderMapper.mapUplinkModeToDownlinkMode("USB", false))
+        assertEquals("LSB", TransponderMapper.mapUplinkModeToDownlinkMode("LSB", false))
+        assertEquals("FM", TransponderMapper.mapUplinkModeToDownlinkMode("FM", false))
+    }
+}

core/presentation/build.gradle.kts

@@ -1,5 +1,5 @@
 plugins {
-    alias(libs.plugins.convention.composeLibraryPlugin)
+    alias(libs.plugins.convention.corePresentationPlugin)
 }
 
 android {

core/presentation/src/main/java/com/rtbishop/look4sat/core/presentation/Components.kt

@@ -45,6 +45,7 @@ import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.material3.adaptive.currentWindowAdaptiveInfo
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.painterResource
@@ -62,8 +63,7 @@ import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
 import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Locale
-
-private val sdfTime = SimpleDateFormat("HH:mm:ss", Locale.ENGLISH)
+import java.util.TimeZone
 
 @Composable
 @Preview(showBackground = true)
@@ -76,19 +76,23 @@ private fun TopBarPreview() = MainTheme {
 }
 
 @Composable
-fun TopBar(content: @Composable (RowScope.() -> Unit)) {
+fun TopBar(content: @Composable RowScope.() -> Unit) {
     Row(
         modifier = Modifier.height(48.dp),
         horizontalArrangement = Arrangement.spacedBy(6.dp),
-        verticalAlignment = Alignment.CenterVertically
-    ) { content() }
+        verticalAlignment = Alignment.CenterVertically,
+        content = content
+    )
 }
 
 @Composable
 fun RowScope.TimerRow(timeString: String, isTimeAos: Boolean) {
     val colorScheme = MaterialTheme.colorScheme
-    val aosColor = if (isTimeAos) colorScheme.primary else colorScheme.onSurface
-    val losColor = if (!isTimeAos) colorScheme.primary else colorScheme.onSurface
+    val (aosColor, losColor) = if (isTimeAos) {
+        colorScheme.primary to colorScheme.onSurface
+    } else {
+        colorScheme.onSurface to colorScheme.primary
+    }
     ElevatedCard(modifier = Modifier.weight(1f)) {
         Row(
             verticalAlignment = Alignment.CenterVertically,
@@ -100,7 +104,7 @@ fun RowScope.TimerRow(timeString: String, isTimeAos: Boolean) {
                 text = timeString,
                 fontSize = 32.sp,
                 fontWeight = FontWeight.Bold,
-                color = MaterialTheme.colorScheme.primary
+                color = colorScheme.primary
             )
             Text(text = "LOS", fontSize = 16.sp, fontWeight = FontWeight.Medium, color = losColor)
         }
@@ -114,7 +118,13 @@ private fun NextPassRowPreview() = MainTheme {
 }
 
 @Composable
-fun RowScope.NextPassRow(pass: OrbitalPass, modifier: Modifier = Modifier) {
+fun RowScope.NextPassRow(pass: OrbitalPass, modifier: Modifier = Modifier, isUtc: Boolean = false) {
+    val timeZone = remember(isUtc) {
+        if (isUtc) TimeZone.getTimeZone("UTC") else TimeZone.getDefault()
+    }
+    val sdfTime = remember(isUtc) {
+        SimpleDateFormat("HH:mm:ss", Locale.ENGLISH).also { it.timeZone = timeZone }
+    }
     ElevatedCard(
         modifier = modifier
             .height(48.dp)
@@ -124,13 +134,11 @@ fun RowScope.NextPassRow(pass: OrbitalPass, modifier: Modifier = Modifier) {
             verticalArrangement = Arrangement.spacedBy((-2).dp),
             modifier = Modifier
                 .fillMaxSize()
-//                .background(color = MaterialTheme.colorScheme.background)
                 .padding(start = 6.dp, top = 1.dp, end = 6.dp, bottom = 0.dp)
         ) {
-            val passSatId = stringResource(id = R.string.pass_satId, pass.catNum)
             Row(verticalAlignment = Alignment.CenterVertically) {
                 Text(
-                    text = "$passSatId - ",
+                    text = "${stringResource(R.string.pass_satId, pass.catNum)} - ",
                     color = MaterialTheme.colorScheme.primary
                 )
                 Text(
@@ -144,7 +152,7 @@ fun RowScope.NextPassRow(pass: OrbitalPass, modifier: Modifier = Modifier) {
                     overflow = TextOverflow.Ellipsis
                 )
                 Icon(
-                    painter = painterResource(id = R.drawable.ic_elevation),
+                    painter = painterResource(R.drawable.ic_elevation),
                     contentDescription = null,
                     tint = MaterialTheme.colorScheme.primary,
                     modifier = Modifier.size(16.dp)
@@ -160,47 +168,30 @@ fun RowScope.NextPassRow(pass: OrbitalPass, modifier: Modifier = Modifier) {
                 horizontalArrangement = Arrangement.SpaceBetween,
                 modifier = Modifier.fillMaxWidth()
             ) {
-                Row(
-                    modifier = Modifier.weight(1f),
-                    horizontalArrangement = Arrangement.Start,
-                    verticalAlignment = Alignment.CenterVertically
-                ) {
-                    Text(
-                        text = sdfTime.format(Date(pass.aosTime)),
-                        fontSize = 15.sp,
-                        modifier = Modifier.weight(1f)
-                    )
-                }
+                Text(
+                    text = sdfTime.format(Date(pass.aosTime)),
+                    fontSize = 15.sp,
+                    modifier = Modifier.weight(1f)
+                )
                 Row(
                     modifier = Modifier.weight(1f),
                     horizontalArrangement = Arrangement.Center,
                     verticalAlignment = Alignment.CenterVertically
                 ) {
                     Icon(
-                        painter = painterResource(id = R.drawable.ic_altitude),
+                        painter = painterResource(R.drawable.ic_altitude),
                         contentDescription = null,
                         modifier = Modifier.size(16.dp)
                     )
                     Spacer(modifier = Modifier.width(4.dp))
-                    Text(
-                        text = "${pass.altitude} km",
-                        fontSize = 15.sp
-                    )
-                }
-                Row(
-                    modifier = Modifier.weight(1f),
-                    horizontalArrangement = Arrangement.End,
-                    verticalAlignment = Alignment.CenterVertically
-                ) {
-                    Text(
-                        text = stringResource(
-                            id = R.string.pass_aosLos,
-                            pass.aosAzimuth.toInt(),
-                            pass.losAzimuth.toInt()
-                        ),
-                        fontSize = 15.sp
-                    )
+                    Text(text = "${pass.altitude} km", fontSize = 15.sp)
                 }
+                Text(
+                    text = stringResource(R.string.pass_aosLos, pass.aosAzimuth.toInt(), pass.losAzimuth.toInt()),
+                    fontSize = 15.sp,
+                    textAlign = TextAlign.End,
+                    modifier = Modifier.weight(1f)
+                )
             }
         }
     }
@@ -209,34 +200,41 @@ fun RowScope.NextPassRow(pass: OrbitalPass, modifier: Modifier = Modifier) {
 @Composable
 fun CardButton(onClick: () -> Unit, text: String, modifier: Modifier = Modifier) {
     ElevatedButton(
-        onClick = { onClick() }, colors = ButtonDefaults.buttonColors(
+        onClick = onClick,
+        colors = ButtonDefaults.buttonColors(
             containerColor = MaterialTheme.colorScheme.surfaceVariant,
             contentColor = MaterialTheme.colorScheme.onSurfaceVariant
-        ), shape = MaterialTheme.shapes.small, modifier = modifier,
+        ),
+        shape = MaterialTheme.shapes.small,
+        modifier = modifier,
         contentPadding = PaddingValues(horizontal = 8.dp, vertical = 8.dp)
     ) { Text(text = text, fontSize = 16.sp, textAlign = TextAlign.Center) }
 }
 
 @Composable
 fun IconCard(action: () -> Unit, resId: Int, modifier: Modifier = Modifier) {
-    val clickableMod = Modifier.clickable { action() }
     ElevatedCard(modifier = Modifier.size(48.dp)) {
-        Box(modifier = clickableMod.fillMaxSize(), contentAlignment = Alignment.Center) {
-            Icon(painter = painterResource(resId), contentDescription = null, modifier = modifier)
-        }
+        Box(
+            modifier = Modifier
+                .clickable(onClick = action)
+                .fillMaxSize(),
+            contentAlignment = Alignment.Center
+        ) { Icon(painter = painterResource(resId), contentDescription = null, modifier = modifier) }
     }
 }
 
 @Composable
 fun PrimaryIconCard(modifier: Modifier = Modifier, resId: Int, onClick: () -> Unit) {
-    val clickableMod = modifier.clickable { onClick() }
     ElevatedCard(
         modifier = Modifier.size(102.dp, 48.dp),
         colors = CardDefaults.elevatedCardColors(containerColor = MaterialTheme.colorScheme.primary)
     ) {
-        Box(modifier = clickableMod.fillMaxSize(), contentAlignment = Alignment.Center) {
-            Icon(painter = painterResource(id = resId), contentDescription = null)
-        }
+        Box(
+            modifier = modifier
+                .clickable(onClick = onClick)
+                .fillMaxSize(),
+            contentAlignment = Alignment.Center
+        ) { Icon(painter = painterResource(resId), contentDescription = null) }
     }
 }
 
@@ -262,56 +260,56 @@ fun EmptyListCard(message: String) {
     }
 }
 
-fun getDefaultPass(): OrbitalPass {
-    val orbitalData = OrbitalData(
-        """ ¯\_(ツ)_/¯ ⚠️""",
-        0.0,
-        0.0,
-        0.0,
-        0.0,
-        0.0,
-        0.0,
-        0.0,
-        0,
-        0.0
-    )
-    val satellite = NearEarthObject(orbitalData)
-    return OrbitalPass(0L, 0.0, Long.MAX_VALUE, 0.0, 0, 0.0, satellite, 0f)
-}
+private val defaultOrbitalData = OrbitalData(
+    name = """ ¯\_(ツ)_/¯ ⚠️""",
+    epoch = 0.0, meanmo = 0.0, eccn = 0.0, incl = 0.0,
+    raan = 0.0, argper = 0.0, meanan = 0.0, catnum = 0, bstar = 0.0
+)
+
+fun getDefaultPass(): OrbitalPass = OrbitalPass(
+    aosTime = 0L, aosAzimuth = 0.0, losTime = Long.MAX_VALUE, losAzimuth = 0.0,
+    altitude = 0, maxElevation = 0.0, orbitalObject = NearEarthObject(defaultOrbitalData), progress = 0f
+)
 
 @Composable
 fun SharedDialog(
     title: String, onCancel: () -> Unit, onAccept: () -> Unit, content: @Composable () -> Unit
 ) {
-    val padding = LocalSpacing.current.large
-    Dialog(onDismissRequest = { onCancel() }) {
-        ElevatedCard {
-            Column(
-                horizontalAlignment = Alignment.CenterHorizontally,
-                verticalArrangement = Arrangement.spacedBy(padding)
-            ) {
-                Text(
-                    text = title,
-                    fontSize = 16.sp,
-                    fontWeight = FontWeight.Medium,
-                    color = MaterialTheme.colorScheme.primary,
-                    modifier = Modifier.padding(start = padding, top = padding, end = padding)
-                )
-                content()
-                Row(modifier = Modifier.padding(start = padding, bottom = padding, end = padding)) {
-                    CardButton(onClick = onCancel, text = stringResource(id = R.string.btn_cancel))
-                    Spacer(modifier = Modifier.weight(1f))
-                    CardButton(onClick = onAccept, text = stringResource(id = R.string.btn_accept))
-                }
-            }
+    DialogShell(title = title, titleFontSize = 16, onDismissRequest = onCancel) {
+        content()
+        Row(modifier = Modifier.padding(start = it, bottom = it, end = it)) {
+            CardButton(onClick = onCancel, text = stringResource(R.string.btn_cancel))
+            Spacer(modifier = Modifier.weight(1f))
+            CardButton(onClick = onAccept, text = stringResource(R.string.btn_accept))
         }
     }
 }
 
 @Composable
 fun InfoDialog(title: String, text: String, onDismiss: () -> Unit) {
+    DialogShell(title = title, titleFontSize = 18, onDismissRequest = {}) {
+        Text(
+            text = text,
+            fontSize = 16.sp,
+            color = MaterialTheme.colorScheme.onSurface,
+            modifier = Modifier.padding(horizontal = it)
+        )
+        Row(modifier = Modifier.padding(start = it, bottom = it, end = it)) {
+            Spacer(modifier = Modifier.weight(1f))
+            CardButton(onClick = onDismiss, text = stringResource(R.string.btn_accept))
+        }
+    }
+}
+
+@Composable
+private fun DialogShell(
+    title: String,
+    titleFontSize: Int,
+    onDismissRequest: () -> Unit,
+    content: @Composable (padding: androidx.compose.ui.unit.Dp) -> Unit
+) {
     val padding = LocalSpacing.current.large
-    Dialog(onDismissRequest = {}) {
+    Dialog(onDismissRequest = onDismissRequest) {
         ElevatedCard {
             Column(
                 horizontalAlignment = Alignment.CenterHorizontally,
@@ -319,54 +317,36 @@ fun InfoDialog(title: String, text: String, onDismiss: () -> Unit) {
             ) {
                 Text(
                     text = title,
-                    fontSize = 18.sp,
+                    fontSize = titleFontSize.sp,
                     fontWeight = FontWeight.Medium,
                     color = MaterialTheme.colorScheme.primary,
                     modifier = Modifier.padding(start = padding, top = padding, end = padding)
                 )
-                Text(
-                    text = text,
-                    fontSize = 16.sp,
-                    color = MaterialTheme.colorScheme.onSurface,
-                    modifier = Modifier.padding(horizontal = padding)
-                )
-                Row(modifier = Modifier.padding(start = padding, bottom = padding, end = padding)) {
-                    Spacer(modifier = Modifier.weight(1f))
-                    CardButton(
-                        onClick = onDismiss,
-                        text = stringResource(id = R.string.btn_accept)
-                    )
-                }
+                content(padding)
             }
         }
     }
 }
 
 @Composable
-fun hasEnoughHeight(): Boolean {
-    return currentWindowAdaptiveInfo().windowSizeClass.isHeightAtLeastBreakpoint(480)
-}
+fun hasEnoughHeight(): Boolean =
+    currentWindowAdaptiveInfo().windowSizeClass.isHeightAtLeastBreakpoint(480)
 
 @Composable
-fun hasEnoughWidth(): Boolean {
-    return currentWindowAdaptiveInfo().windowSizeClass.isWidthAtLeastBreakpoint(600)
-}
+fun hasEnoughWidth(): Boolean =
+    currentWindowAdaptiveInfo().windowSizeClass.isWidthAtLeastBreakpoint(600)
 
 @Composable
-fun isVerticalLayout(): Boolean {
-    return currentWindowAdaptiveInfo().windowSizeClass.isWidthAtLeastBreakpoint(600).not()
-}
+fun isVerticalLayout(): Boolean = !hasEnoughWidth()
 
 @Composable
-fun Modifier.infiniteMarquee(): Modifier {
-    return basicMarquee(iterations = Int.MAX_VALUE, spacing = MarqueeSpacing(16.dp))
-}
+fun Modifier.infiniteMarquee(): Modifier =
+    basicMarquee(iterations = Int.MAX_VALUE, spacing = MarqueeSpacing(16.dp))
 
 @Composable
 fun Modifier.layoutPadding(): Modifier {
-    val statusBarMod = this.statusBarsPadding()
     val spacing = LocalSpacing.current.extraSmall
-    return statusBarMod.padding(start = spacing, top = 0.dp, end = spacing, bottom = spacing)
+    return statusBarsPadding().padding(start = spacing, top = 0.dp, end = spacing, bottom = spacing)
 }
 
 @Composable
@@ -375,15 +355,15 @@ fun ScreenColumn(
     floatingBar: @Composable () -> Unit = {},
     content: @Composable (Boolean) -> Unit = {}
 ) {
-    val isVerticalLayout = isVerticalLayout()
+    val isVertical = isVerticalLayout()
     Surface(color = MaterialTheme.colorScheme.background) {
         Box(modifier = Modifier.layoutPadding(), contentAlignment = Alignment.BottomCenter) {
             Column(verticalArrangement = Arrangement.spacedBy(LocalSpacing.current.extraSmall)) {
-                topBar(isVerticalLayout)
+                topBar(isVertical)
                 Surface(
                     modifier = Modifier.fillMaxSize(),
                     color = MaterialTheme.colorScheme.surfaceContainer
-                ) { content(isVerticalLayout) }
+                ) { content(isVertical) }
             }
             floatingBar()
         }
@@ -394,21 +374,14 @@ fun ScreenColumn(
 fun TopBar(
     isVerticalLayout: Boolean,
     startAction: @Composable () -> Unit,
-    topInfo: @Composable (RowScope.() -> Unit),
-    bottomInfo: @Composable (RowScope.() -> Unit),
+    topInfo: @Composable RowScope.() -> Unit,
+    bottomInfo: @Composable RowScope.() -> Unit,
     endAction: @Composable () -> Unit
 ) {
-    val topBarRow = @Composable { content: @Composable RowScope.() -> Unit ->
-        Row(
-            modifier = Modifier.height(48.dp),
-            horizontalArrangement = Arrangement.spacedBy(6.dp),
-            verticalAlignment = Alignment.CenterVertically
-        ) { content() }
-    }
     if (isVerticalLayout) {
-        topBarRow { startAction().also { topInfo() }.also { endAction() } }
-        topBarRow { bottomInfo() }
+        TopBar { startAction(); topInfo(); endAction() }
+        TopBar { bottomInfo() }
     } else {
-        topBarRow { startAction().also { topInfo() }.also { bottomInfo() }.also { endAction() } }
+        TopBar { startAction(); topInfo(); bottomInfo(); endAction() }
     }
 }

core/presentation/src/main/java/com/rtbishop/look4sat/core/presentation/Navigation.kt

@@ -6,4 +6,5 @@ sealed class Screen(val route: String, val iconResId: Int, val titleResId: Int)
     data object Radar : Screen("radar", R.drawable.ic_radar, R.string.nav_radar)
     data object Map : Screen("map", R.drawable.ic_map, R.string.nav_map)
     data object Settings : Screen("settings", R.drawable.ic_settings, R.string.nav_prefs)
+    data object RadioControl : Screen("radiocontrol", R.drawable.ic_radios, R.string.nav_radiocontrol)
 }

core/presentation/src/main/res/values-es/strings.xml

@@ -118,12 +118,10 @@
 
     <string name="prefs_net_title">Salida de datos de red</string>
     <string name="prefs_net_rotator_switch">Enable rotation output</string>
-    <string name="prefs_net_rotator_ip_hint">Dirección IP</string>
-    <string name="prefs_net_rotator_port_hint">Puerto</string>
+    <string name="prefs_net_rotator_address_hint">IP:Puerto</string>
     <string name="prefs_net_rotator_format_hint">Formato de datos</string>
     <string name="prefs_net_frequency_switch">Enable frequency output</string>
-    <string name="prefs_net_frequency_ip_hint">Dirección IP</string>
-    <string name="prefs_net_frequency_port_hint">Puerto</string>
+    <string name="prefs_net_frequency_address_hint">IP:Puerto</string>
     <string name="prefs_net_frequency_format_hint">Formato de datos</string>
 
     <string name="prefs_bt_title">Salida por Bluetooth</string>

core/presentation/src/main/res/values-ru/strings.xml

@@ -117,12 +117,10 @@
 
     <string name="prefs_net_title">Вывод сетевых данных</string>
     <string name="prefs_net_rotator_switch">Включить вывод ротатора</string>
-    <string name="prefs_net_rotator_ip_hint">IP адрес</string>
-    <string name="prefs_net_rotator_port_hint">Порт</string>
+    <string name="prefs_net_rotator_address_hint">IP:Порт</string>
     <string name="prefs_net_rotator_format_hint">Формат</string>
     <string name="prefs_net_frequency_switch">Включить вывод частоты</string>
-    <string name="prefs_net_frequency_ip_hint">IP адрес</string>
-    <string name="prefs_net_frequency_port_hint">Порт</string>
+    <string name="prefs_net_frequency_address_hint">IP:Порт</string>
     <string name="prefs_net_frequency_format_hint">Формат</string>
 
     <string name="prefs_bt_title">Вывод данных Bluetooth</string>

core/presentation/src/main/res/values-si/strings.xml

@@ -118,12 +118,10 @@
 
     <string name="prefs_net_title">ජාල ප්‍රතිදානය</string>
     <string name="prefs_net_rotator_switch">Enable rotation output</string>
-    <string name="prefs_net_rotator_ip_hint">IP ලිපිනය</string>
-    <string name="prefs_net_rotator_port_hint">Port</string>
+    <string name="prefs_net_rotator_address_hint">IP:Port</string>
     <string name="prefs_net_rotator_format_hint">දත්ත අකාරය</string>
     <string name="prefs_net_frequency_switch">Enable frequency output</string>
-    <string name="prefs_net_frequency_ip_hint">IP ලිපිනය</string>
-    <string name="prefs_net_frequency_port_hint">Port</string>
+    <string name="prefs_net_frequency_address_hint">IP:Port</string>
     <string name="prefs_net_frequency_format_hint">දත්ත අකාරය</string>
 
     <string name="prefs_bt_title">Bluetooth දත්ත ප්‍රතිදානය</string>

core/presentation/src/main/res/values-uk/strings.xml

@@ -118,12 +118,10 @@
 
     <string name="prefs_net_title">Вивід мережевих даних</string>
     <string name="prefs_net_rotator_switch">Enable rotation output</string>
-    <string name="prefs_net_rotator_ip_hint">IP адреса</string>
-    <string name="prefs_net_rotator_port_hint">Порт</string>
+    <string name="prefs_net_rotator_address_hint">IP:Порт</string>
     <string name="prefs_net_rotator_format_hint">Формат даних</string>
     <string name="prefs_net_frequency_switch">Enable frequency output</string>
-    <string name="prefs_net_frequency_ip_hint">IP адреса</string>
-    <string name="prefs_net_frequency_port_hint">Порт</string>
+    <string name="prefs_net_frequency_address_hint">IP:Порт</string>
     <string name="prefs_net_frequency_format_hint">Формат даних</string>
 
     <string name="prefs_bt_title">Вивід даних Bluetooth</string>

core/presentation/src/main/res/values-zh/strings.xml

@@ -110,12 +110,10 @@
 
     <string name="prefs_net_title">网络数据输出</string>
     <string name="prefs_net_rotator_switch">启用方位俯仰角输出</string>
-    <string name="prefs_net_rotator_ip_hint">IP地址</string>
-    <string name="prefs_net_rotator_port_hint">端口</string>
+    <string name="prefs_net_rotator_address_hint">IP:端口</string>
     <string name="prefs_net_rotator_format_hint">数据格式</string>
     <string name="prefs_net_frequency_switch">启用多普勒频率输出</string>
-    <string name="prefs_net_frequency_ip_hint">IP地址</string>
-    <string name="prefs_net_frequency_port_hint">端口</string>
+    <string name="prefs_net_frequency_address_hint">IP:端口</string>
     <string name="prefs_net_frequency_format_hint">数据格式</string>
 
     <string name="prefs_bt_title">蓝牙数据输出</string>

core/presentation/src/main/res/values/strings.xml

@@ -48,8 +48,11 @@
         \n\nPlease update the database at least weekly to get accurate predictions.</string>
     <string name="pass_whatsnew_title" translatable="false">What\'s new in Look4Sat</string>
     <string name="pass_whatsnew_message" translatable="false">
-        * Londre7 fixed the track path creation issue for split screen
-        as well as enabled the compass data usage for landscape orientation
+        * Switched to short-form commands in NetworkReporter, by theojalba
+        \n* Added CAT radio control for full-duplex SAT operation, by jcmerg
+        \n* Added normalized time for passes AOS/LOS, fixed refresh state bug
+        \n* Added multiple performance tweaks, improved passes calculation
+        \n* Fixed UTC pass time problem mentioned in issue #201
     </string>
 
     <!-- Radar screen -->
@@ -144,15 +147,24 @@
     <string name="prefs_data_output_title">Data output</string>
     <string name="prefs_net_output">Network</string>
     <string name="prefs_bt_output">Bluetooth</string>
+    <string name="prefs_cat_output">CAT</string>
+
+    <!-- Radio Control -->
+    <string name="nav_radiocontrol">Radio Control</string>
+    <string name="rc_settings_title">CAT Radio Control</string>
+    <string name="rc_radio_model">Radio Model</string>
+    <string name="rc_tx_device_hint">TX Radio BT Address</string>
+    <string name="rc_rx_device_hint">RX Radio BT Address</string>
+    <string name="rc_tx_name_hint">TX Radio Name</string>
+    <string name="rc_rx_name_hint">RX Radio Name</string>
+    <string name="rc_enable_switch">Enable CAT Control</string>
 
     <string name="prefs_net_title">Network data output</string>
     <string name="prefs_net_rotator_switch">Enable rotation output</string>
-    <string name="prefs_net_rotator_ip_hint">IP address</string>
-    <string name="prefs_net_rotator_port_hint">Port</string>
+    <string name="prefs_net_rotator_address_hint">IP:Port</string>
     <string name="prefs_net_rotator_format_hint">Format</string>
     <string name="prefs_net_frequency_switch">Enable frequency output</string>
-    <string name="prefs_net_frequency_ip_hint">IP address</string>
-    <string name="prefs_net_frequency_port_hint">Port</string>
+    <string name="prefs_net_frequency_address_hint">IP:Port</string>
     <string name="prefs_net_frequency_format_hint">Format</string>
 
     <string name="prefs_bt_title">Bluetooth data output</string>

fastlane/metadata/android/en-US/changelogs/default.txt

@@ -1,2 +1,6 @@
-* Fixed track path creation issue for split screens (#199) by londre7
-* Enabled using compass data for landscape orientation (#202) by londre7
+* Switched to short-form commands in NetworkReporter (#206) by theojalba
+* Added CAT radio control for full-duplex SAT operation (#207) by jcmerg
+* Added normalized time for passes AOS/LOS, fixed refresh state bug
+* Added multiple performance tweaks, improved passes calculation
+* Simplified data output code, aligned with HamLib defaults
+* Fixed UTC pass time problem mentioned in issue #201

fastlane/metadata/android/en-US/whatsnew/whatsnew-en-US

@@ -1,2 +1,6 @@
-* Fixed track path creation issue for split screens (#199) by londre7
-* Enabled using compass data for landscape orientation (#202) by londre7
+* Switched to short-form commands in NetworkReporter (#206) by theojalba
+* Added CAT radio control for full-duplex SAT operation (#207) by jcmerg
+* Added normalized time for passes AOS/LOS, fixed refresh state bug
+* Added multiple performance tweaks, improved passes calculation
+* Simplified data output code, aligned with HamLib defaults
+* Fixed UTC pass time problem mentioned in issue #201

feature/map/build.gradle.kts

@@ -1,5 +1,5 @@
 plugins {
-    alias(libs.plugins.convention.composeFeaturePlugin)
+    alias(libs.plugins.convention.featurePlugin)
 }
 
 android {

feature/map/src/main/java/com/rtbishop/look4sat/feature/map/MapScreen.kt

@@ -24,6 +24,7 @@ import android.graphics.ColorMatrixColorFilter
 import android.graphics.Paint
 import android.graphics.Rect
 import android.graphics.drawable.Drawable
+import androidx.collection.LruCache
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -40,7 +41,7 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.State
+import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -80,6 +81,13 @@ import org.osmdroid.views.overlay.FolderOverlay
 import org.osmdroid.views.overlay.Marker
 import org.osmdroid.views.overlay.Polyline
 
+// Overlay indices
+private const val OVERLAY_STATION = 0
+private const val OVERLAY_TRACK = 1
+private const val OVERLAY_FOOTPRINT = 2
+private const val OVERLAY_POSITIONS = 3
+private const val OVERLAY_COUNT = 4
+
 private val minLat = MapView.getTileSystem().minLatitude
 private val maxLat = MapView.getTileSystem().maxLatitude
 private val trackPaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
@@ -100,98 +108,110 @@ private val textPaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
     color = "#FFE082".toColorInt()
     setShadowLayer(3f, 3f, 3f, Color.BLACK)
 }
-private val labelRect = Rect()
+private val iconCache = LruCache<String, Drawable>(128)
 
 fun NavGraphBuilder.mapDestination() {
     composable(Screen.Map.route) {
         val viewModel = viewModel(MapViewModel::class.java, factory = MapViewModel.Factory)
-        val uiState = viewModel.uiState.collectAsStateWithLifecycle()
+        val uiState by viewModel.uiState.collectAsStateWithLifecycle()
         val mapView = rememberMapViewWithLifecycle()
-        MapScreen(uiState, mapView)
+        MapScreen(uiState, viewModel::onAction, mapView)
     }
 }
 
 @Composable
-private fun MapScreen(uiState: State<MapState>, mapView: MapView) {
-    val onItemClick = { item: OrbitalObject -> uiState.value.sendAction(MapAction.SelectItem(item)) }
-    val selectPrev = { uiState.value.sendAction(MapAction.SelectPrev) }
-    val selectNext = { uiState.value.sendAction(MapAction.SelectNext) }
+private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView: MapView) {
     val rotateMod = Modifier.rotate(180f)
-    val timeString = uiState.value.mapData?.aosTime ?: "00:00:00"
-    val isTimeAos = uiState.value.mapData?.isTimeAos ?: true
-    LaunchedEffect(uiState.value.track) {
-        val latitude = uiState.value.track?.get(0)?.get(0)?.latitude ?: 0.0
-        val longitude = uiState.value.track?.get(0)?.get(0)?.longitude ?: 0.0
-        mapView.controller.animateTo(GeoPoint(latitude, longitude))
+    val timeString = uiState.mapData?.aosTime ?: "00:00:00"
+    val isTimeAos = uiState.mapData?.isTimeAos ?: true
+
+    LaunchedEffect(uiState.track) {
+        val firstPos = uiState.track?.firstOrNull()?.firstOrNull() ?: return@LaunchedEffect
+        mapView.controller.animateTo(GeoPoint(firstPos.latitude, firstPos.longitude))
     }
     Column(modifier = Modifier.layoutPadding(), verticalArrangement = Arrangement.spacedBy(6.dp)) {
-        if (isVerticalLayout()) {
+        val isVertical = isVerticalLayout()
+        if (isVertical) {
             TopBar {
-                IconCard(action = selectPrev, resId = R.drawable.ic_arrow, modifier = rotateMod)
+                IconCard(action = { onAction(MapAction.SelectPrev) }, resId = R.drawable.ic_arrow, modifier = rotateMod)
                 TimerRow(timeString = timeString, isTimeAos = isTimeAos)
-                IconCard(action = selectNext, resId = R.drawable.ic_arrow)
+                IconCard(action = { onAction(MapAction.SelectNext) }, resId = R.drawable.ic_arrow)
             }
-            TopBar { NextPassRow(pass = uiState.value.orbitalPass) }
+            TopBar { NextPassRow(pass = uiState.orbitalPass, isUtc = uiState.isUtc) }
         } else {
             TopBar {
-                IconCard(action = selectPrev, resId = R.drawable.ic_arrow, modifier = rotateMod)
+                IconCard(action = { onAction(MapAction.SelectPrev) }, resId = R.drawable.ic_arrow, modifier = rotateMod)
                 TimerRow(timeString = timeString, isTimeAos = isTimeAos)
-                NextPassRow(pass = uiState.value.orbitalPass, modifier = Modifier.weight(1f))
-                IconCard(action = selectNext, resId = R.drawable.ic_arrow)
+                NextPassRow(pass = uiState.orbitalPass, modifier = Modifier.weight(1f), isUtc = uiState.isUtc)
+                IconCard(action = { onAction(MapAction.SelectNext) }, resId = R.drawable.ic_arrow)
             }
         }
         ElevatedCard(modifier = Modifier.weight(1f)) {
             Box(contentAlignment = Alignment.BottomCenter) {
-                AndroidView({ mapView }) { mapView ->
-                    uiState.value.stationPosition?.let { setStationPosition(it, mapView) }
-                    uiState.value.positions?.let { setPositions(it, mapView, onItemClick) }
-                    uiState.value.track?.let { setSatelliteTrack(it, mapView) }
-                    uiState.value.footprint?.let { setFootprint(it, mapView) }
+                AndroidView({ mapView }) { view ->
+                    uiState.stationPosition?.let { setStationPosition(it, view) }
+                    uiState.track?.let { setSatelliteTrack(it, view) }
+                    uiState.footprint?.let { setFootprint(it, view) }
+                    uiState.positions?.let { setPositions(it, view) { item -> onAction(MapAction.SelectItem(item)) } }
+                    view.invalidate()
                 }
-                uiState.value.mapData?.let { mapData ->
-                    if (isVerticalLayout()) MapDataCard(mapData) else MapDataCards(mapData)
+                uiState.mapData?.let { mapData ->
+                    if (isVertical) MapDataCard(mapData) else MapDataCards(mapData)
                 }
             }
         }
     }
 }
 
+// region Map data composables
 @Composable
 private fun MapDataCard(data: MapData) {
     val textColor = MaterialTheme.colorScheme.primary
     val cardColors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surfaceContainerLowest)
-    Column(horizontalAlignment = Alignment.CenterHorizontally, verticalArrangement = Arrangement.SpaceBetween) {
+    Column(horizontalAlignment = Alignment.CenterHorizontally) {
         Text(text = stringResource(R.string.map_copyright), fontSize = 14.sp)
         Card(colors = cardColors) {
             Column(modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp)) {
-                Row(horizontalArrangement = Arrangement.SpaceBetween, modifier = Modifier.fillMaxWidth()) {
-                    Text(text = stringResource(R.string.map_azimuth, data.azimuth), color = textColor)
-                    Text(text = stringResource(R.string.map_elevation, data.elevation), color = textColor)
-                }
-                Row(horizontalArrangement = Arrangement.SpaceBetween, modifier = Modifier.fillMaxWidth()) {
-                    Text(text = stringResource(R.string.map_altitude, data.altitude))
-                    Text(text = stringResource(R.string.map_distance, data.range))
-                }
-                Row(horizontalArrangement = Arrangement.SpaceBetween, modifier = Modifier.fillMaxWidth()) {
-                    Text(text = stringResource(R.string.map_latitude, data.osmPos.latitude), color = textColor)
-                    Text(text = stringResource(R.string.map_longitude, data.osmPos.longitude), color = textColor)
-                }
-                Row(horizontalArrangement = Arrangement.SpaceBetween, modifier = Modifier.fillMaxWidth()) {
-                    Text(text = stringResource(R.string.map_qth, data.qthLoc))
-                    Text(text = stringResource(R.string.map_phase, data.phase))
-                }
+                MapDataRow(
+                    stringResource(R.string.map_azimuth, data.azimuth) to textColor,
+                    stringResource(R.string.map_elevation, data.elevation) to textColor
+                )
+                MapDataRow(
+                    stringResource(R.string.map_altitude, data.altitude) to null,
+                    stringResource(R.string.map_distance, data.range) to null
+                )
+                MapDataRow(
+                    stringResource(R.string.map_latitude, data.osmPos.latitude) to textColor,
+                    stringResource(R.string.map_longitude, data.osmPos.longitude) to textColor
+                )
+                MapDataRow(
+                    stringResource(R.string.map_qth, data.qthLoc) to null,
+                    stringResource(R.string.map_phase, data.phase) to null
+                )
             }
         }
     }
 }
 
+@Composable
+private fun MapDataRow(
+    left: Pair<String, androidx.compose.ui.graphics.Color?>,
+    right: Pair<String, androidx.compose.ui.graphics.Color?>
+) {
+    Row(horizontalArrangement = Arrangement.SpaceBetween, modifier = Modifier.fillMaxWidth()) {
+        if (left.second != null) Text(text = left.first, color = left.second!!)
+        else Text(text = left.first)
+        if (right.second != null) Text(text = right.first, color = right.second!!)
+        else Text(text = right.first)
+    }
+}
+
 @Composable
 private fun MapDataCards(data: MapData) {
     val cardColors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surfaceContainerLowest)
     val paddingMod = Modifier
         .padding(horizontal = 8.dp, vertical = 4.dp)
         .width(160.dp)
-    val osmText = stringResource(R.string.map_copyright)
     val textColor = MaterialTheme.colorScheme.primary
     Box(modifier = Modifier.fillMaxSize()) {
         Card(colors = cardColors, modifier = Modifier.align(Alignment.TopStart)) {
@@ -212,7 +232,11 @@ private fun MapDataCards(data: MapData) {
                 Text(text = stringResource(R.string.map_qth, data.qthLoc))
             }
         }
-        Text(text = osmText, fontSize = 14.sp, modifier = Modifier.align(Alignment.BottomCenter))
+        Text(
+            text = stringResource(R.string.map_copyright),
+            fontSize = 14.sp,
+            modifier = Modifier.align(Alignment.BottomCenter)
+        )
         Card(colors = cardColors, modifier = Modifier.align(Alignment.BottomEnd)) {
             Column(horizontalAlignment = Alignment.End, modifier = paddingMod) {
                 Text(text = stringResource(R.string.map_latitude, data.osmPos.latitude), color = textColor)
@@ -221,113 +245,175 @@ private fun MapDataCards(data: MapData) {
         }
     }
 }
+// endregion
 
+// region Map overlay helpers
 private fun setStationPosition(stationPos: GeoPos, mapView: MapView) {
     try {
-        Marker(mapView).apply {
-            setInfoWindow(null)
-            setAnchor(Marker.ANCHOR_CENTER, Marker.ANCHOR_BOTTOM)
-            icon = ContextCompat.getDrawable(mapView.context, R.drawable.ic_position)
-            position = GeoPoint(stationPos.latitude, stationPos.longitude)
-            mapView.overlays[0] = this
-            mapView.invalidate()
-        }
-    } catch (exception: Exception) {
-        println(exception)
-    }
-}
-
-private fun setPositions(posMap: Map<OrbitalObject, GeoPos>, mapView: MapView, action: (OrbitalObject) -> Unit) {
-    val markers = FolderOverlay()
-    try {
-        posMap.entries.forEach {
-            Marker(mapView).apply {
+        val overlay = mapView.overlays[OVERLAY_STATION]
+        if (overlay is Marker) {
+            overlay.position = GeoPoint(stationPos.latitude, stationPos.longitude)
+        } else {
+            mapView.overlays[OVERLAY_STATION] = Marker(mapView).apply {
                 setInfoWindow(null)
-                setAnchor(Marker.ANCHOR_CENTER, Marker.ANCHOR_CENTER)
-                icon = getCustomTextIcon(it.key.data.name, mapView)
-                try {
-                    position = GeoPoint(it.value.latitude, it.value.longitude)
-                } catch (exception: IllegalArgumentException) {
-                    println(exception.stackTraceToString())
-                }
-                setOnMarkerClickListener { _, _ ->
-                    action(it.key)
-                    return@setOnMarkerClickListener true
-                }
-                markers.add(this)
+                setAnchor(Marker.ANCHOR_CENTER, Marker.ANCHOR_BOTTOM)
+                icon = ContextCompat.getDrawable(mapView.context, R.drawable.ic_position)
+                position = GeoPoint(stationPos.latitude, stationPos.longitude)
             }
         }
-        mapView.overlays[3] = markers
-        mapView.invalidate()
-    } catch (exception: Exception) {
-        println(exception)
+    } catch (e: Exception) {
+        println(e)
     }
 }
 
-private fun getCustomTextIcon(textLabel: String, mapView: MapView): Drawable {
-    textPaint.getTextBounds(textLabel, 0, textLabel.length, labelRect)
+/** Pool of reusable Marker objects keyed by satellite name, to avoid re-creation every frame */
+private val markerPool = HashMap<String, Marker>()
+private var lastMapView: MapView? = null
+
+private fun setPositions(
+    posMap: Map<OrbitalObject, GeoPos>,
+    mapView: MapView,
+    action: (OrbitalObject) -> Unit
+) {
+    try {
+        // Clear caches when the MapView instance changes (e.g. config change)
+        if (lastMapView !== mapView) {
+            lastMapView = mapView
+            markerPool.clear()
+            iconCache.evictAll()
+            footprintPolyline = null
+            footprintPoints = null
+        }
+        // Reuse the existing FolderOverlay — creating a new one and replacing it
+        // causes osmdroid to detach shared Marker objects, making them invisible.
+        val folder = mapView.overlays[OVERLAY_POSITIONS] as? FolderOverlay ?: FolderOverlay().also {
+            mapView.overlays[OVERLAY_POSITIONS] = it
+        }
+        folder.items.clear()
+
+        val activeNames = HashSet<String>(posMap.size)
+        posMap.forEach { (satellite, geoPos) ->
+            val name = satellite.data.name
+            activeNames.add(name)
+            val marker = markerPool.getOrPut(name) {
+                Marker(mapView).apply {
+                    setInfoWindow(null)
+                    setAnchor(Marker.ANCHOR_CENTER, Marker.ANCHOR_CENTER)
+                    icon = getCachedTextIcon(name, mapView)
+                }
+            }
+            // Update position in-place — reuse existing GeoPoint if available
+            val pos = marker.position
+            if (pos != null) {
+                pos.latitude = geoPos.latitude
+                pos.longitude = geoPos.longitude
+            } else {
+                marker.position = GeoPoint(geoPos.latitude, geoPos.longitude)
+            }
+            marker.setOnMarkerClickListener { _, _ ->
+                action(satellite)
+                true
+            }
+            folder.add(marker)
+        }
+        // Evict markers for satellites no longer tracked
+        val iter = markerPool.keys.iterator()
+        while (iter.hasNext()) {
+            if (iter.next() !in activeNames) iter.remove()
+        }
+    } catch (e: Exception) {
+        println(e)
+    }
+}
+
+private fun getCachedTextIcon(name: String, mapView: MapView): Drawable {
+    iconCache[name]?.let { return it }
+    val labelRect = Rect()
+    textPaint.getTextBounds(name, 0, name.length, labelRect)
     val iconSize = 10f
     val width = labelRect.width() + iconSize * 2f
     val height = textPaint.textSize * 3f + iconSize * 2f
     val bitmap = createBitmap(width.toInt(), height.toInt())
     Canvas(bitmap).run {
         drawCircle(width / 2f, height / 2f, iconSize, textPaint)
-        drawText(textLabel, iconSize / 2f, height - iconSize, textPaint)
+        drawText(name, iconSize / 2f, height - iconSize, textPaint)
     }
-    return bitmap.toDrawable(mapView.context.resources)
+    val drawable = bitmap.toDrawable(mapView.context.resources)
+    iconCache.put(name, drawable)
+    return drawable
 }
 
 private fun setSatelliteTrack(satTrack: List<List<GeoPos>>, mapView: MapView) {
     val trackOverlay = FolderOverlay()
     try {
         satTrack.forEach { track ->
-            val trackPoints = track.map { GeoPoint(it.latitude, it.longitude) }
             Polyline().apply {
-                setPoints(trackPoints)
+                setPoints(track.map { GeoPoint(it.latitude, it.longitude) })
                 outlinePaint.set(trackPaint)
                 trackOverlay.add(this)
             }
         }
-        mapView.overlays[1] = trackOverlay
-    } catch (exception: Exception) {
-        println(exception)
+        mapView.overlays[OVERLAY_TRACK] = trackOverlay
+    } catch (e: Exception) {
+        println(e)
     }
 }
 
+/** Reusable footprint Polyline — created once, points updated in-place each frame */
+private var footprintPolyline: Polyline? = null
+private var footprintPoints: ArrayList<GeoPoint>? = null
+
 private fun setFootprint(orbitalPos: OrbitalPos, mapView: MapView) {
-    val footprintPoints = orbitalPos.getRangeCircle().map { GeoPoint(it.latitude, it.longitude) }
     try {
-        val footprintOverlay = Polyline().apply {
-            outlinePaint.set(footprintPaint)
-            setPoints(footprintPoints)
+        val rangeCircle = orbitalPos.getRangeCircle()
+        // Lazily initialize the reusable point list and polyline
+        var pts = footprintPoints
+        if (pts == null || pts.size != rangeCircle.size) {
+            pts = ArrayList(rangeCircle.size)
+            for (gp in rangeCircle) pts.add(GeoPoint(gp.latitude, gp.longitude))
+            footprintPoints = pts
+        } else {
+            // Update coordinates in-place — zero allocations
+            for (i in rangeCircle.indices) {
+                pts[i].latitude = rangeCircle[i].latitude
+                pts[i].longitude = rangeCircle[i].longitude
+            }
         }
-        mapView.overlays[2] = footprintOverlay
-    } catch (exception: Exception) {
-        println(exception)
+        val polyline = footprintPolyline ?: Polyline().apply {
+            outlinePaint.set(footprintPaint)
+            footprintPolyline = this
+        }
+        polyline.setPoints(pts)
+        mapView.overlays[OVERLAY_FOOTPRINT] = polyline
+    } catch (e: Exception) {
+        println(e)
     }
 }
+// endregion
 
+// region MapView lifecycle
 @Composable
 private fun rememberMapViewWithLifecycle(): MapView {
     val tileSource = XYTileSource("tiles", 0, 6, 256, ".webp", emptyArray<String>())
     val context = LocalContext.current
-    val mapView = remember { MapView(context) }.apply {
-        setMultiTouchControls(true)
-        setUseDataConnection(false)
-        setTileSource(tileSource)
-        minZoomLevel = getMinZoom(resources.displayMetrics.heightPixels)
-        maxZoomLevel = 7.0
-        controller.setCenter(GeoPoint(48.8575, 6.3514))
-        controller.setZoom(minZoomLevel + 2)
-        zoomController.setVisibility(CustomZoomButtonsController.Visibility.NEVER)
-        overlayManager.tilesOverlay.loadingBackgroundColor = Color.TRANSPARENT
-        overlayManager.tilesOverlay.loadingLineColor = Color.TRANSPARENT
-        overlayManager.tilesOverlay.setColorFilter(getColorFilter())
-        setScrollableAreaLimitLatitude(maxLat, minLat, 0)
-        // add overlays: 0 - GSP, 1 - SatTrack, 2 - SatFootprint, 3 - SatIcons
-        overlays.addAll(Array(4) { FolderOverlay() })
+    val isVertical = isVerticalLayout()
+    val mapView = remember {
+        MapView(context).apply {
+            setMultiTouchControls(true)
+            setUseDataConnection(false)
+            setTileSource(tileSource)
+            minZoomLevel = getMinZoom(resources.displayMetrics.heightPixels, isVertical)
+            maxZoomLevel = 7.0
+            controller.setCenter(GeoPoint(48.8575, 6.3514))
+            controller.setZoom(minZoomLevel + 2)
+            zoomController.setVisibility(CustomZoomButtonsController.Visibility.NEVER)
+            overlayManager.tilesOverlay.loadingBackgroundColor = Color.TRANSPARENT
+            overlayManager.tilesOverlay.loadingLineColor = Color.TRANSPARENT
+            overlayManager.tilesOverlay.setColorFilter(createColorFilter())
+            setScrollableAreaLimitLatitude(maxLat, minLat, 0)
+            overlays.addAll(Array(OVERLAY_COUNT) { FolderOverlay() })
+        }
     }
-    // Makes MapView follow the lifecycle of this composable
     val lifecycleObserver = rememberMapViewLifecycleObserver(mapView)
     val lifecycle = LocalLifecycleOwner.current.lifecycle
     DisposableEffect(lifecycle) {
@@ -348,8 +434,7 @@ private fun rememberMapViewLifecycleObserver(mapView: MapView) = remember(mapVie
     }
 }
 
-@Composable
-private fun getColorFilter(): ColorMatrixColorFilter {
+private fun createColorFilter(): ColorMatrixColorFilter {
     val grayScale = ColorMatrix().apply { setSaturation(0f) }
     val negative = ColorMatrix(
         floatArrayOf(-1f, 0f, 0f, 0f, 260f, 0f, -1f, 0f, 0f, 260f, 0f, 0f, -1f, 0f, 260f, 0f, 0f, 0f, 1f, 0f)
@@ -358,8 +443,8 @@ private fun getColorFilter(): ColorMatrixColorFilter {
     return ColorMatrixColorFilter(negative)
 }
 
-@Composable
-private fun getMinZoom(screenHeight: Int): Double {
-    if (!isVerticalLayout()) return 3.5
+private fun getMinZoom(screenHeight: Int, isVertical: Boolean): Double {
+    if (!isVertical) return 3.5
     return MapView.getTileSystem().getLatitudeZoom(maxLat, minLat, screenHeight)
 }
+// endregion

feature/map/src/main/java/com/rtbishop/look4sat/feature/map/MapState.kt

@@ -23,21 +23,21 @@ import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
 
 data class MapState(
-    val mapData: MapData?,
-    val isLightUi: Boolean,
-    val stationPosition: GeoPos?,
+    val mapData: MapData? = null,
+    val isLightUi: Boolean = false,
+    val isUtc: Boolean = false,
+    val stationPosition: GeoPos? = null,
     val orbitalPass: OrbitalPass,
-    val track: List<List<GeoPos>>?,
-    val footprint: OrbitalPos?,
-    val positions: Map<OrbitalObject, GeoPos>?,
-    val sendAction: (MapAction) -> Unit
+    val track: List<List<GeoPos>>? = null,
+    val footprint: OrbitalPos? = null,
+    val positions: Map<OrbitalObject, GeoPos>? = null
 )
 
-sealed class MapAction {
-    data object SelectPrev: MapAction()
-    data object SelectNext: MapAction()
-    data class SelectItem(val item: OrbitalObject): MapAction()
-    data class SelectDefaultItem(val catnum: Int): MapAction()
+sealed interface MapAction {
+    data object SelectPrev : MapAction
+    data object SelectNext : MapAction
+    data class SelectItem(val item: OrbitalObject) : MapAction
+    data class SelectDefaultItem(val catnum: Int) : MapAction
 }
 
 data class MapData(

feature/map/src/main/java/com/rtbishop/look4sat/feature/map/MapViewModel.kt

@@ -24,6 +24,8 @@ import androidx.lifecycle.viewmodel.initializer
 import androidx.lifecycle.viewmodel.viewModelFactory
 import com.rtbishop.look4sat.core.domain.predict.GeoPos
 import com.rtbishop.look4sat.core.domain.predict.OrbitalObject
+import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
+import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
 import com.rtbishop.look4sat.core.domain.repository.ISatelliteRepo
 import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
@@ -34,30 +36,29 @@ import com.rtbishop.look4sat.core.domain.utility.toDegrees
 import com.rtbishop.look4sat.core.domain.utility.toTimerString
 import com.rtbishop.look4sat.core.presentation.getDefaultPass
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.async
+import kotlinx.coroutines.awaitAll
 import kotlinx.coroutines.cancelAndJoin
+import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 import java.util.Date
 
-class MapViewModel(private val satelliteRepo: ISatelliteRepo, settingsRepo: ISettingsRepo) :
+class MapViewModel(private val satelliteRepo: ISatelliteRepo, private val settingsRepo: ISettingsRepo) :
     ViewModel() {
 
     private val stationPos = settingsRepo.stationPosition.value
     private val defaultPass = getDefaultPass()
     private val _uiState = MutableStateFlow(
         MapState(
-            mapData = null,
             isLightUi = settingsRepo.otherSettings.value.stateOfLightTheme,
-            stationPosition = null,
-            orbitalPass = defaultPass,
-            track = null,
-            footprint = null,
-            positions = null,
-            sendAction = ::handleAction
+            isUtc = settingsRepo.otherSettings.value.stateOfUtc,
+            orbitalPass = defaultPass
         )
     )
     private var allPasses = satelliteRepo.passes.value
@@ -68,10 +69,15 @@ class MapViewModel(private val satelliteRepo: ISatelliteRepo, settingsRepo: ISet
     val uiState: StateFlow<MapState> = _uiState
 
     init {
+        viewModelScope.launch {
+            settingsRepo.otherSettings.collectLatest { settings ->
+                _uiState.update { it.copy(isUtc = settings.stateOfUtc) }
+            }
+        }
         selectDefaultSatellite(-1)
     }
 
-    private fun handleAction(action: MapAction) {
+    fun onAction(action: MapAction) {
         when (action) {
             MapAction.SelectPrev -> scrollSelection(true)
             MapAction.SelectNext -> scrollSelection(false)
@@ -120,15 +126,133 @@ class MapViewModel(private val satelliteRepo: ISatelliteRepo, settingsRepo: ISet
                 getSatTrack(orbitalObject, stationPos, dateNow)
                 while (isActive) {
                     dateNow.time = System.currentTimeMillis()
-                    getPositions(allSatellites, stationPos, dateNow)
-                    getSatFootprint(orbitalObject, stationPos, dateNow)
-                    getSatData(orbitalObject, stationPos, dateNow)
+                    updateMapState(orbitalObject, allSatellites, stationPos, dateNow)
                     delay(updateFreq)
                 }
             }
         }
     }
 
+    /**
+     * Combined update: computes all satellite positions in parallel, then derives
+     * the selected satellite's footprint and info panel data from the same batch,
+     * and emits a single state update to avoid redundant recompositions.
+     */
+    private suspend fun updateMapState(
+        selected: OrbitalObject,
+        orbitalObjects: List<OrbitalObject>,
+        pos: GeoPos,
+        date: Date
+    ) {
+        // 1. Compute all positions in parallel, collecting full OrbitalPos for the selected sat
+        val positionsMap = HashMap<OrbitalObject, GeoPos>(orbitalObjects.size)
+        var selectedSatPos: OrbitalPos? = null
+
+        coroutineScope {
+            // Chunk satellites to balance parallelism vs coroutine overhead
+            val chunkSize = maxOf(1, orbitalObjects.size / PARALLEL_CHUNKS)
+            val deferreds = orbitalObjects.chunked(chunkSize).map { chunk ->
+                async {
+                    val localPositions = ArrayList<Pair<OrbitalObject, GeoPos>>(chunk.size)
+                    var localSelectedPos: OrbitalPos? = null
+                    for (satellite in chunk) {
+                        val satPos = satelliteRepo.getPosition(satellite, pos, date.time)
+                        val osmLat = clipLat(satPos.latitude.toDegrees())
+                        val osmLon = clipLon(satPos.longitude.toDegrees())
+                        localPositions.add(satellite to GeoPos(osmLat, osmLon))
+                        if (satellite === selected) {
+                            localSelectedPos = satPos
+                        }
+                    }
+                    Pair(localPositions, localSelectedPos)
+                }
+            }
+            for ((localPositions, localSelectedPos) in deferreds.awaitAll()) {
+                for (pair in localPositions) {
+                    positionsMap[pair.first] = pair.second
+                }
+                if (localSelectedPos != null) {
+                    selectedSatPos = localSelectedPos
+                }
+            }
+        }
+
+        // 2. Derive footprint and info data from the already-computed selected position
+        val satPos = selectedSatPos ?: satelliteRepo.getPosition(selected, pos, date.time)
+        val footprint = satPos
+        val mapData = buildMapData(selected, satPos, date)
+
+        // 3. Single atomic state update — one recomposition per cycle
+        _uiState.update {
+            it.copy(
+                positions = positionsMap,
+                footprint = footprint,
+                mapData = mapData.first,
+                orbitalPass = mapData.second
+            )
+        }
+    }
+
+    /**
+     * Builds the map info panel data from an already-computed OrbitalPos.
+     * No additional getPosition() call needed.
+     */
+    private fun buildMapData(
+        sat: OrbitalObject,
+        satPos: OrbitalPos,
+        date: Date
+    ): Pair<MapData, OrbitalPass> {
+        var orbitalPass = defaultPass
+        var aosTime = 0L.toTimerString()
+        var isTimeAos = true
+        allPasses.find { pass -> pass.catNum == sat.data.catnum && pass.progress < 1 }
+            ?.let { satPass ->
+                orbitalPass = satPass
+                if (!satPass.isDeepSpace) {
+                    when {
+                        date.time < satPass.aosTime -> {
+                            // Pass hasn't started yet — count down to AOS
+                            isTimeAos = true
+                            aosTime = (satPass.aosTime - date.time).toTimerString()
+                        }
+
+                        date.time < satPass.losTime -> {
+                            // Pass is in progress — count down to LOS
+                            isTimeAos = false
+                            aosTime = (satPass.losTime - date.time).toTimerString()
+                        }
+                        // else: pass has ended (losTime <= date.time) — keep default "00:00:00"
+                    }
+                }
+            }
+        val azimuth = satPos.azimuth.toDegrees()
+        val elevation = satPos.elevation.toDegrees()
+        val osmLat = clipLat(satPos.latitude.toDegrees())
+        val osmLon = clipLon(satPos.longitude.toDegrees())
+        val osmPos = GeoPos(osmLat, osmLon)
+        val qthLoc = positionToQth(osmPos.latitude, osmPos.longitude) ?: "-- --"
+        val velocity = satPos.getOrbitalVelocity()
+        val phase = satPos.phase.toDegrees()
+        val visibility = satPos.eclipsed
+        val satData = MapData(
+            sat.data.catnum,
+            sat.data.name,
+            aosTime,
+            isTimeAos,
+            azimuth,
+            elevation,
+            satPos.distance,
+            satPos.altitude,
+            velocity,
+            qthLoc,
+            osmPos,
+            sat.data.orbitalPeriod,
+            phase,
+            visibility
+        )
+        return satData to orbitalPass
+    }
+
     private suspend fun getSatTrack(orbitalObject: OrbitalObject, pos: GeoPos, date: Date) {
         val satTracks = mutableListOf<List<GeoPos>>()
         val currentTrack = mutableListOf<GeoPos>()
@@ -158,71 +282,10 @@ class MapViewModel(private val satelliteRepo: ISatelliteRepo, settingsRepo: ISet
         _uiState.update { it.copy(track = satTracks) }
     }
 
-    private suspend fun getPositions(orbitalObjects: List<OrbitalObject>, pos: GeoPos, date: Date) {
-        val positions = mutableMapOf<OrbitalObject, GeoPos>()
-        orbitalObjects.forEach { satellite ->
-            val satPos = satelliteRepo.getPosition(satellite, pos, date.time)
-            val osmLat = clipLat(satPos.latitude.toDegrees())
-            val osmLon = clipLon(satPos.longitude.toDegrees())
-            positions[satellite] = GeoPos(osmLat, osmLon)
-        }
-        _uiState.update { it.copy(positions = positions) }
-    }
-
-    private suspend fun getSatFootprint(orbitalObject: OrbitalObject, pos: GeoPos, date: Date) {
-        val satPos = satelliteRepo.getPosition(orbitalObject, pos, date.time)
-        _uiState.update { it.copy(footprint = satPos) }
-    }
-
-    private suspend fun getSatData(sat: OrbitalObject, pos: GeoPos, date: Date) {
-        var orbitalPass = defaultPass
-        var aosTime = 0L.toTimerString()
-        var isTimeAos = true
-        allPasses.find { pass -> pass.catNum == sat.data.catnum && pass.progress < 1 }
-            ?.let { satPass ->
-                orbitalPass = satPass
-                if (!satPass.isDeepSpace) {
-                    aosTime = if (date.time < satPass.aosTime) {
-                        val millisBeforeStart = satPass.aosTime.minus(date.time)
-                        isTimeAos = true
-                        millisBeforeStart.toTimerString()
-                    } else {
-                        val millisBeforeEnd = satPass.losTime.minus(date.time)
-                        isTimeAos = false
-                        millisBeforeEnd.toTimerString()
-                    }
-                }
-            }
-        val satPos = satelliteRepo.getPosition(sat, pos, date.time)
-        val azimuth = satPos.azimuth.toDegrees()
-        val elevation = satPos.elevation.toDegrees()
-        val osmLat = clipLat(satPos.latitude.toDegrees())
-        val osmLon = clipLon(satPos.longitude.toDegrees())
-        val osmPos = GeoPos(osmLat, osmLon)
-        val qthLoc = positionToQth(osmPos.latitude, osmPos.longitude) ?: "-- --"
-        val velocity = satPos.getOrbitalVelocity()
-        val phase = satPos.phase.toDegrees()
-        val visibility = satPos.eclipsed
-        val satData = MapData(
-            sat.data.catnum,
-            sat.data.name,
-            aosTime,
-            isTimeAos,
-            azimuth,
-            elevation,
-            satPos.distance,
-            satPos.altitude,
-            velocity,
-            qthLoc,
-            osmPos,
-            sat.data.orbitalPeriod,
-            phase,
-            visibility
-        )
-        _uiState.update { it.copy(mapData = satData, orbitalPass = orbitalPass) }
-    }
-
     companion object {
+        /** Number of parallel chunks for satellite position computation */
+        private const val PARALLEL_CHUNKS = 4
+
         val Factory: ViewModelProvider.Factory = viewModelFactory {
             val applicationKey = ViewModelProvider.AndroidViewModelFactory.APPLICATION_KEY
             initializer {

feature/passes/build.gradle.kts

@@ -1,5 +1,5 @@
 plugins {
-    alias(libs.plugins.convention.composeFeaturePlugin)
+    alias(libs.plugins.convention.featurePlugin)
 }
 
 android {

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesDialog.kt

@@ -32,12 +32,11 @@ import androidx.compose.material3.Checkbox
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Slider
-import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.mutableDoubleStateOf
 import androidx.compose.runtime.mutableIntStateOf
-import androidx.compose.runtime.mutableStateListOf
+import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -61,6 +60,8 @@ private val allModes = listOf(
     "PSK", "PSK31", "PSK63", "QPSK", "QPSK31", "QPSK63", "SSTV", "USB", "WSJT"
 )
 
+private val hourSteps = listOf(1, 2, 4, 8, 12, 24, 48, 72, 96, 120, 144, 168, 192, 216, 240)
+
 @Preview
 @Composable
 private fun PassesDialogPreview() {
@@ -68,27 +69,28 @@ private fun PassesDialogPreview() {
 }
 
 @Composable
-fun PassesDialog(hours: Int, elevation: Double, cancel: () -> Unit, accept: (Int, Double) -> Unit) {
-    val hoursValue = remember { mutableIntStateOf(hours) }
+internal fun PassesDialog(hours: Int, elevation: Double, cancel: () -> Unit, accept: (Int, Double) -> Unit) {
+    val hoursIndex = remember { mutableIntStateOf(hourSteps.indexOfFirst { it >= hours }.coerceAtLeast(0)) }
     val elevationValueNew = remember { mutableDoubleStateOf(elevation) }
     val onAccept = {
-        accept(hoursValue.intValue, elevationValueNew.doubleValue).also { cancel() }
+        accept(hourSteps[hoursIndex.intValue], elevationValueNew.doubleValue).also { cancel() }
     }
     SharedDialog(title = stringResource(R.string.pass_filter_title), onCancel = cancel, onAccept = onAccept) {
         SliderRow(
             title = stringResource(R.string.pass_filter_elev),
             value = elevationValueNew.doubleValue,
-            valuePostfix = "°",
+            displayValue = "${elevationValueNew.doubleValue.toInt()}°",
             valueResId = R.drawable.ic_elevation,
             valueRange = 0f..60f
         ) { elevationValueNew.doubleValue = it.toDouble() }
         SliderRow(
             title = stringResource(R.string.pass_filter_hours),
-            value = hoursValue.intValue.toDouble(),
-            valuePostfix = "h",
+            value = hoursIndex.intValue.toDouble(),
+            displayValue = "${hourSteps[hoursIndex.intValue]}h",
             valueResId = R.drawable.ic_clock,
-            valueRange = 1f..240f
-        ) { hoursValue.intValue = it.toInt() }
+            valueRange = 0f..(hourSteps.size - 1).toFloat(),
+            steps = hourSteps.size - 2
+        ) { hoursIndex.intValue = it.toInt().coerceIn(0, hourSteps.size - 1) }
     }
 }
 
@@ -96,9 +98,10 @@ fun PassesDialog(hours: Int, elevation: Double, cancel: () -> Unit, accept: (Int
 private fun SliderRow(
     title: String,
     value: Double,
-    valuePostfix: String,
+    displayValue: String,
     valueResId: Int,
     valueRange: ClosedFloatingPointRange<Float>,
+    steps: Int = 0,
     onChange: (Float) -> Unit
 ) {
     Column(
@@ -123,13 +126,13 @@ private fun SliderRow(
                 modifier = Modifier.size(20.dp)
             )
             Text(
-                text = "${value.toInt()}$valuePostfix",
+                text = displayValue,
                 fontSize = 18.sp,
                 fontWeight = FontWeight.Medium,
                 color = MaterialTheme.colorScheme.primary
             )
         }
-        Slider(value = value.toFloat(), onValueChange = onChange, valueRange = valueRange)
+        Slider(value = value.toFloat(), onValueChange = onChange, valueRange = valueRange, steps = steps)
     }
 }
 
@@ -140,12 +143,12 @@ private fun RadiosDialogPreview() {
 }
 
 @Composable
-fun RadiosDialog(modes: List<String>, cancel: () -> Unit, accept: (List<String>) -> Unit) {
-    val selected = remember { mutableStateListOf<String>().apply { addAll(modes) } }
-    val select = { mode: String ->
-        if (selected.contains(mode)) selected.remove(mode) else selected.add(mode)
+internal fun RadiosDialog(modes: List<String>, cancel: () -> Unit, accept: (List<String>) -> Unit) {
+    val selected = remember { mutableStateOf(modes.toSet()) }
+    val toggle = { mode: String ->
+        selected.value = if (mode in selected.value) selected.value - mode else selected.value + mode
     }
-    val onAccept = { accept(selected.toList()).also { cancel() } }
+    val onAccept = { accept(selected.value.toList()).also { cancel() } }
     SharedDialog(title = stringResource(R.string.pass_modes_title), onCancel = cancel, onAccept = onAccept) {
         LazyVerticalGrid(
             columns = GridCells.Adaptive(240.dp),
@@ -156,32 +159,30 @@ fun RadiosDialog(modes: List<String>, cancel: () -> Unit, accept: (List<String>)
             verticalArrangement = Arrangement.spacedBy(1.dp)
         ) {
             itemsIndexed(allModes) { index, item ->
-                Surface {
-                    Row(
-                        verticalAlignment = Alignment.CenterVertically,
-                        modifier = Modifier
-                            .background(MaterialTheme.colorScheme.surface)
-                            .clickable { select(item) }
-                    ) {
-                        Text(
-                            text = "${index + 1}).",
-                            modifier = Modifier.padding(start = 16.dp, end = 8.dp),
-                            fontWeight = FontWeight.Normal,
-                            color = MaterialTheme.colorScheme.primary
-                        )
-                        Text(
-                            text = item,
-                            modifier = Modifier.weight(1f),
-                            fontWeight = FontWeight.Medium,
-                            maxLines = 1,
-                            overflow = TextOverflow.Ellipsis
-                        )
-                        Checkbox(
-                            checked = selected.contains(item),
-                            onCheckedChange = null,
-                            modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp)
-                        )
-                    }
+                Row(
+                    verticalAlignment = Alignment.CenterVertically,
+                    modifier = Modifier
+                        .background(MaterialTheme.colorScheme.surface)
+                        .clickable { toggle(item) }
+                ) {
+                    Text(
+                        text = "${index + 1}).",
+                        modifier = Modifier.padding(start = 16.dp, end = 8.dp),
+                        fontWeight = FontWeight.Normal,
+                        color = MaterialTheme.colorScheme.primary
+                    )
+                    Text(
+                        text = item,
+                        modifier = Modifier.weight(1f),
+                        fontWeight = FontWeight.Medium,
+                        maxLines = 1,
+                        overflow = TextOverflow.Ellipsis
+                    )
+                    Checkbox(
+                        checked = item in selected.value,
+                        onCheckedChange = null,
+                        modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp)
+                    )
                 }
             }
         }

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesScreen.kt

@@ -35,15 +35,16 @@ import androidx.compose.foundation.lazy.grid.items
 import androidx.compose.foundation.lazy.grid.rememberLazyGridState
 import androidx.compose.material3.ElevatedCard
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.LinearProgressIndicator
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.material3.pulltorefresh.PullToRefreshBox
 import androidx.compose.material3.pulltorefresh.PullToRefreshDefaults
 import androidx.compose.material3.pulltorefresh.rememberPullToRefreshState
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.painterResource
@@ -76,9 +77,7 @@ import com.rtbishop.look4sat.core.presentation.isVerticalLayout
 import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Locale
-
-private val sdfDate = SimpleDateFormat("EEE dd MMM", Locale.ENGLISH)
-private val sdfTime = SimpleDateFormat("HH:mm:ss", Locale.ENGLISH)
+import java.util.TimeZone
 
 fun NavGraphBuilder.passesDestination(navigateToRadar: (Int, Long) -> Unit) {
     composable(Screen.Passes.route) {
@@ -87,27 +86,31 @@ fun NavGraphBuilder.passesDestination(navigateToRadar: (Int, Long) -> Unit) {
             factory = PassesViewModel.Factory
         )
         val uiState = viewModel.uiState.collectAsStateWithLifecycle().value
-        PassesScreen(uiState, navigateToRadar)
+        PassesScreen(uiState, viewModel::onAction, navigateToRadar)
     }
 }
 
 @Composable
-private fun PassesScreen(uiState: PassesState, navigateToRadar: (Int, Long) -> Unit) {
-    val refreshList = { uiState.takeAction(PassesAction.RefreshPasses) }
-    val showPassesDialog = { uiState.takeAction(PassesAction.TogglePassesDialog) }
-    val showRadiosDialog = { uiState.takeAction(PassesAction.ToggleRadiosDialog) }
+private fun PassesScreen(
+    uiState: PassesState,
+    onAction: (PassesAction) -> Unit,
+    navigateToRadar: (Int, Long) -> Unit
+) {
     if (uiState.isPassesDialogShown) {
         PassesDialog(
             hours = uiState.hours,
             elevation = uiState.elevation,
-            cancel = showPassesDialog
+            cancel = { onAction(PassesAction.TogglePassesDialog) }
         ) { hours, elevation ->
-            uiState.takeAction(PassesAction.FilterPasses(hours, elevation))
+            onAction(PassesAction.FilterPasses(hours, elevation))
         }
     }
     if (uiState.isRadiosDialogShown) {
-        RadiosDialog(modes = uiState.modes, cancel = showRadiosDialog) { modes ->
-            uiState.takeAction(PassesAction.FilterRadios(modes))
+        RadiosDialog(
+            modes = uiState.modes,
+            cancel = { onAction(PassesAction.ToggleRadiosDialog) }
+        ) { modes ->
+            onAction(PassesAction.FilterRadios(modes))
         }
     }
     if (uiState.shouldSeeWhatsNew) {
@@ -115,7 +118,7 @@ private fun PassesScreen(uiState: PassesState, navigateToRadar: (Int, Long) -> U
             title = stringResource(R.string.pass_whatsnew_title),
             text = stringResource(R.string.pass_whatsnew_message)
         ) {
-            uiState.takeAction(PassesAction.DismissWhatsNew)
+            onAction(PassesAction.DismissWhatsNew)
         }
     }
     val gridState = rememberLazyGridState()
@@ -124,25 +127,26 @@ private fun PassesScreen(uiState: PassesState, navigateToRadar: (Int, Long) -> U
             TopBar(
                 isVerticalLayout = isVerticalLayout,
                 startAction = {
-                    IconCard(action = showPassesDialog, resId = R.drawable.ic_filter)
+                    IconCard(action = { onAction(PassesAction.TogglePassesDialog) }, resId = R.drawable.ic_filter)
                 },
                 topInfo = {
                     TimerRow(timeString = uiState.nextTime, isTimeAos = uiState.isNextTimeAos)
                 },
                 bottomInfo = {
-                    NextPassRow(pass = uiState.nextPass)
+                    NextPassRow(pass = uiState.nextPass, isUtc = uiState.isUtc)
                 },
                 endAction = {
-                    IconCard(action = showRadiosDialog, resId = R.drawable.ic_radios)
+                    IconCard(action = { onAction(PassesAction.ToggleRadiosDialog) }, resId = R.drawable.ic_radios)
                 }
             )
         }
     ) { _ ->
         PassesList(
             isRefreshing = uiState.isRefreshing,
+            isUtc = uiState.isUtc,
             passes = uiState.itemsList,
             navigateToRadar = navigateToRadar,
-            refreshPasses = refreshList,
+            refreshPasses = { onAction(PassesAction.RefreshPasses) },
             gridState = gridState
         )
     }
@@ -152,6 +156,7 @@ private fun PassesScreen(uiState: PassesState, navigateToRadar: (Int, Long) -> U
 @Composable
 private fun PassesList(
     isRefreshing: Boolean,
+    isUtc: Boolean,
     passes: List<OrbitalPass>,
     navigateToRadar: (Int, Long) -> Unit,
     refreshPasses: () -> Unit,
@@ -183,11 +188,12 @@ private fun PassesList(
                     modifier = Modifier.fillMaxSize()
                 ) {
                     items(items = passes, key = { item -> item.catNum + item.aosTime }) { pass ->
-                        NearEarthPass(
+                        PassItem(
                             pass = pass,
                             navigateToRadar = navigateToRadar,
                             modifier = Modifier.animateItem(),
-                            isVerticalLayout = isVerticalLayout
+                            isVerticalLayout = isVerticalLayout,
+                            isUtc = isUtc
                         )
                     }
                 }
@@ -202,7 +208,7 @@ private fun DeepSpacePassPreview() {
     val data = OrbitalData("Satellite", 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 45000, 0.0)
     val satellite = DeepSpaceObject(data)
     val pass = OrbitalPass(1L, 180.0, 10L, 360.0, 36650, 45.0, satellite, 0.5f)
-    MainTheme { NearEarthPass(pass = pass, { _, _ -> }) }
+    MainTheme { PassItem(pass = pass, { _, _ -> }) }
 }
 
 @Preview(showBackground = true)
@@ -211,126 +217,143 @@ private fun NearEarthPassPreview() {
     val data = OrbitalData("Satellite", 0.0, 15.0, 0.0, 0.0, 0.0, 0.0, 0.0, 45000, 0.0)
     val satellite = NearEarthObject(data)
     val pass = OrbitalPass(1L, 180.0, 10L, 360.0, 36650, 45.0, satellite, 0.5f)
-    MainTheme { NearEarthPass(pass = pass, { _, _ -> }) }
+    MainTheme { PassItem(pass = pass, { _, _ -> }) }
 }
 
 @Composable
-private fun NearEarthPass(
+private fun PassItem(
     pass: OrbitalPass,
     navigateToRadar: (Int, Long) -> Unit,
     modifier: Modifier = Modifier,
-    isVerticalLayout: Boolean = true
+    isVerticalLayout: Boolean = true,
+    isUtc: Boolean = false
 ) {
     val passSatId = stringResource(id = R.string.pass_satId, pass.catNum)
     val horizontalPadding = if (isVerticalLayout) 6.dp else 10.dp
-    Surface(color = MaterialTheme.colorScheme.background, modifier = modifier) {
-        Surface(modifier = Modifier
-            .padding(bottom = 2.dp)
-            .clickable { navigateToRadar(pass.catNum, pass.aosTime) }) {
-            Column(
-                verticalArrangement = Arrangement.spacedBy(1.dp),
-                modifier = Modifier
-                    .background(color = MaterialTheme.colorScheme.surface)
-                    .padding(horizontal = horizontalPadding, vertical = 4.dp)
+    val timeZone = remember(isUtc) {
+        if (isUtc) TimeZone.getTimeZone("UTC") else TimeZone.getDefault()
+    }
+    val sdfDate = remember(isUtc) {
+        SimpleDateFormat("EEE dd MMM", Locale.ENGLISH).also { it.timeZone = timeZone }
+    }
+    val sdfTime = remember(isUtc) {
+        SimpleDateFormat("HH:mm:ss", Locale.ENGLISH).also { it.timeZone = timeZone }
+    }
+    val aosDateStr = remember(pass.aosTime, isUtc) { sdfDate.format(Date(pass.aosTime)) }
+    val aosTimeStr = remember(pass.aosTime, isUtc) { sdfTime.format(Date(pass.aosTime)) }
+    val losTimeStr = remember(pass.losTime, isUtc) { sdfTime.format(Date(pass.losTime)) }
+
+    Column(
+        modifier = modifier.clickable { navigateToRadar(pass.catNum, pass.aosTime) }
+    ) {
+        Column(
+            verticalArrangement = Arrangement.spacedBy(1.dp),
+            modifier = Modifier
+                .fillMaxWidth()
+                .background(color = MaterialTheme.colorScheme.surface)
+                .padding(horizontal = horizontalPadding, vertical = 4.dp)
+        ) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Text(
+                    text = "$passSatId - ",
+                    color = MaterialTheme.colorScheme.primary
+                )
+                Text(
+                    text = pass.name,
+                    modifier = Modifier
+                        .weight(1f)
+                        .padding(end = 6.dp)
+                        .infiniteMarquee(),
+                    fontWeight = FontWeight.Medium,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis,
+                    color = MaterialTheme.colorScheme.onSurface
+                )
+                Icon(
+                    painter = painterResource(id = R.drawable.ic_elevation),
+                    contentDescription = null,
+                    tint = MaterialTheme.colorScheme.primary,
+                    modifier = Modifier.size(16.dp)
+                )
+                Spacer(modifier = Modifier.width(4.dp))
+                Text(
+                    text = "${pass.maxElevation}°",
+                    color = MaterialTheme.colorScheme.primary
+                )
+            }
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.SpaceBetween,
+                modifier = Modifier.fillMaxWidth()
             ) {
-                Row(verticalAlignment = Alignment.CenterVertically) {
-                    Text(
-                        text = "$passSatId - ",
-                        color = MaterialTheme.colorScheme.primary
-                    )
-                    Text(
-                        text = pass.name,
-                        modifier = Modifier
-                            .weight(1f)
-                            .padding(end = 6.dp)
-                            .infiniteMarquee(),
-                        fontWeight = FontWeight.Medium,
-                        maxLines = 1,
-                        overflow = TextOverflow.Ellipsis
-                    )
+                Row(
+                    modifier = Modifier.weight(1f),
+                    horizontalArrangement = Arrangement.Start,
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    if (pass.isDeepSpace) {
+                        Text(
+                            text = stringResource(R.string.pass_deep_space),
+                            fontSize = 15.sp,
+                            color = MaterialTheme.colorScheme.onSurface
+                        )
+                    } else {
+                        Text(text = aosDateStr, fontSize = 15.sp, color = MaterialTheme.colorScheme.onSurface)
+                    }
+                }
+                Row(
+                    modifier = Modifier.weight(1f),
+                    horizontalArrangement = Arrangement.Center,
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
                     Icon(
-                        painter = painterResource(id = R.drawable.ic_elevation),
+                        painter = painterResource(id = R.drawable.ic_altitude),
                         contentDescription = null,
-                        tint = MaterialTheme.colorScheme.primary,
-                        modifier = Modifier.size(16.dp)
+                        modifier = Modifier.size(16.dp),
+                        tint = MaterialTheme.colorScheme.onSurface
                     )
                     Spacer(modifier = Modifier.width(4.dp))
-                    Text(
-                        text = "${pass.maxElevation}°",
-                        color = MaterialTheme.colorScheme.primary
-                    )
+                    Text(text = "${pass.altitude} km", fontSize = 15.sp, color = MaterialTheme.colorScheme.onSurface)
                 }
                 Row(
-                    verticalAlignment = Alignment.CenterVertically,
-                    horizontalArrangement = Arrangement.SpaceBetween,
-                    modifier = Modifier.fillMaxWidth()
+                    modifier = Modifier.weight(1f),
+                    horizontalArrangement = Arrangement.End,
+                    verticalAlignment = Alignment.CenterVertically
                 ) {
-                    Row(
-                        modifier = Modifier.weight(1f),
-                        horizontalArrangement = Arrangement.Start,
-                        verticalAlignment = Alignment.CenterVertically
-                    ) {
-                        if (pass.isDeepSpace) {
-                            Text(text = stringResource(R.string.pass_deep_space), fontSize = 15.sp)
-                        } else {
-                            Text(
-                                text = sdfDate.format(Date(pass.aosTime)),
-                                fontSize = 15.sp
-                            )
-                        }
-                    }
-                    Row(
-                        modifier = Modifier.weight(1f),
-                        horizontalArrangement = Arrangement.Center,
-                        verticalAlignment = Alignment.CenterVertically
-                    ) {
-                        Icon(
-                            painter = painterResource(id = R.drawable.ic_altitude),
-                            contentDescription = null,
-                            modifier = Modifier.size(16.dp)
-                        )
-                        Spacer(modifier = Modifier.width(4.dp))
-                        Text(
-                            text = "${pass.altitude} km",
-                            fontSize = 15.sp
-                        )
-                    }
-                    Row(
-                        modifier = Modifier.weight(1f),
-                        horizontalArrangement = Arrangement.End,
-                        verticalAlignment = Alignment.CenterVertically
-                    ) {
-                        Text(
-                            text = stringResource(
-                                id = R.string.pass_aosLos,
-                                pass.aosAzimuth.toInt(),
-                                pass.losAzimuth.toInt()
-                            ),
-                            fontSize = 15.sp
-                        )
-                    }
-                }
-                Row(
-                    verticalAlignment = Alignment.CenterVertically,
-                    horizontalArrangement = Arrangement.SpaceBetween,
-                    modifier = Modifier.fillMaxWidth()
-                ) {
-                    val defaultTime = "   - - : - -   "
                     Text(
-                        text = if (pass.isDeepSpace) defaultTime else sdfTime.format(Date(pass.aosTime)),
-                        fontSize = 15.sp
-                    )
-                    LinearProgressIndicator(
-                        progress = { if (pass.isDeepSpace) 100f else pass.progress },
-                        drawStopIndicator = {},
-                        modifier = modifier.fillMaxWidth(0.75f)
-                    )
-                    Text(
-                        text = if (pass.isDeepSpace) defaultTime else sdfTime.format(Date(pass.losTime)),
-                        fontSize = 15.sp
+                        text = stringResource(
+                            id = R.string.pass_aosLos,
+                            pass.aosAzimuth.toInt(),
+                            pass.losAzimuth.toInt()
+                        ),
+                        fontSize = 15.sp,
+                        color = MaterialTheme.colorScheme.onSurface
                     )
                 }
             }
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.SpaceBetween,
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                val defaultTime = "   - - : - -   "
+                Text(
+                    text = if (pass.isDeepSpace) defaultTime else aosTimeStr,
+                    fontSize = 15.sp,
+                    color = MaterialTheme.colorScheme.onSurface
+                )
+                LinearProgressIndicator(
+                    progress = { if (pass.isDeepSpace) 100f else pass.progress },
+                    drawStopIndicator = {},
+                    modifier = Modifier.fillMaxWidth(0.75f)
+                )
+                Text(
+                    text = if (pass.isDeepSpace) defaultTime else losTimeStr,
+                    fontSize = 15.sp,
+                    color = MaterialTheme.colorScheme.onSurface
+                )
+            }
         }
+        HorizontalDivider(thickness = 2.dp, color = MaterialTheme.colorScheme.background)
     }
 }

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesState.kt

@@ -20,26 +20,25 @@ package com.rtbishop.look4sat.feature.passes
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
 
 data class PassesState(
-    val isPassesDialogShown: Boolean,
-    val isRadiosDialogShown: Boolean,
-    val isRefreshing: Boolean,
-    val isUtc: Boolean,
+    val isPassesDialogShown: Boolean = false,
+    val isRadiosDialogShown: Boolean = false,
+    val isRefreshing: Boolean = true,
+    val isUtc: Boolean = false,
     val nextPass: OrbitalPass,
-    val nextTime: String,
-    val isNextTimeAos: Boolean,
-    val hours: Int,
-    val elevation: Double,
-    val modes: List<String>,
-    val itemsList: List<OrbitalPass>,
-    val shouldSeeWhatsNew: Boolean,
-    val takeAction: (PassesAction) -> Unit
+    val nextTime: String = "00:00:00",
+    val isNextTimeAos: Boolean = true,
+    val hours: Int = 24,
+    val elevation: Double = 16.0,
+    val modes: List<String> = emptyList(),
+    val itemsList: List<OrbitalPass> = emptyList(),
+    val shouldSeeWhatsNew: Boolean = false
 )
 
-sealed class PassesAction {
-    data object DismissWhatsNew : PassesAction()
-    data class FilterPasses(val hoursAhead: Int, val minElevation: Double) : PassesAction()
-    data class FilterRadios(val modes: List<String>) : PassesAction()
-    data object RefreshPasses : PassesAction()
-    data object TogglePassesDialog : PassesAction()
-    data object ToggleRadiosDialog : PassesAction()
+sealed interface PassesAction {
+    data object DismissWhatsNew : PassesAction
+    data class FilterPasses(val hoursAhead: Int, val minElevation: Double) : PassesAction
+    data class FilterRadios(val modes: List<String>) : PassesAction
+    data object RefreshPasses : PassesAction
+    data object TogglePassesDialog : PassesAction
+    data object ToggleRadiosDialog : PassesAction
 }

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesViewModel.kt

@@ -27,14 +27,14 @@ import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
 import com.rtbishop.look4sat.core.domain.repository.ISatelliteRepo
 import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
+import com.rtbishop.look4sat.core.domain.utility.round
 import com.rtbishop.look4sat.core.domain.utility.toTimerString
 import com.rtbishop.look4sat.core.presentation.getDefaultPass
-import kotlinx.coroutines.Job
-import kotlinx.coroutines.cancelAndJoin
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.flow.drop
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
@@ -44,97 +44,130 @@ class PassesViewModel(
     private val settingsRepo: ISettingsRepo
 ) : ViewModel() {
 
+    private val defaultPass = getDefaultPass()
     private val _uiState = MutableStateFlow(
         PassesState(
-            isPassesDialogShown = false,
-            isRadiosDialogShown = false,
-            isRefreshing = true,
             isUtc = settingsRepo.otherSettings.value.stateOfUtc,
-            nextTime = "00:00:00",
-            isNextTimeAos = true,
-            nextPass = getDefaultPass(),
+            nextPass = defaultPass,
             hours = settingsRepo.passesSettings.value.hoursAhead,
             elevation = settingsRepo.passesSettings.value.minElevation,
             modes = settingsRepo.passesSettings.value.selectedModes,
-            itemsList = emptyList(),
-            shouldSeeWhatsNew = settingsRepo.otherSettings.value.shouldSeeWhatsNew,
-            takeAction = ::handleAction
+            shouldSeeWhatsNew = settingsRepo.otherSettings.value.shouldSeeWhatsNew
         )
     )
-    private var processing: Job? = null
     val uiState: StateFlow<PassesState> = _uiState
 
     init {
+        // Show refreshing indicator whenever the selected satellites list changes
         viewModelScope.launch {
-            delay(1000)
-            satelliteRepo.passes.collectLatest { passes ->
-                processing?.cancelAndJoin()
-                processing = viewModelScope.launch {
-                    while (isActive) {
-                        val timeNow = System.currentTimeMillis()
-                        val newPasses = satelliteRepo.processPasses(passes, timeNow)
-                        setPassInfo(newPasses, timeNow)
-                        _uiState.update { it.copy(isRefreshing = false, itemsList = newPasses) }
-                        delay(1000)
-                    }
+            settingsRepo.selectedIds.collectLatest { selectedIds ->
+                _uiState.update { it.copy(isRefreshing = true) }
+                if (selectedIds.isEmpty()) {
+                    // No satellites selected — show indicator briefly, then stop
+                    delay(1000)
+                    _uiState.update { it.copy(isRefreshing = false) }
                 }
+                // For non-empty selections, the passes collector below will clear isRefreshing
+            }
+        }
+        // Stop refreshing whenever new passes arrive (from initial load, selection change, or filter)
+        viewModelScope.launch {
+            satelliteRepo.passes.drop(1).collect { _ ->
+                _uiState.update { it.copy(isRefreshing = false) }
+            }
+        }
+        // Local tick loop — computes pass progress and countdown timer every second
+        viewModelScope.launch {
+            while (isActive) {
+                val timeNow = System.currentTimeMillis()
+                val processed = computePassProgress(satelliteRepo.passes.value, timeNow)
+                val (nextPass, nextTime, isAos) = resolveNextPass(processed, timeNow)
+                _uiState.update {
+                    it.copy(
+                        itemsList = processed,
+                        nextPass = nextPass,
+                        nextTime = nextTime,
+                        isNextTimeAos = isAos
+                    )
+                }
+                delay(1000)
             }
         }
         viewModelScope.launch {
             settingsRepo.otherSettings.collectLatest { settings ->
-                _uiState.update { it.copy(shouldSeeWhatsNew = settings.shouldSeeWhatsNew) }
+                _uiState.update {
+                    it.copy(
+                        isUtc = settings.stateOfUtc,
+                        shouldSeeWhatsNew = settings.shouldSeeWhatsNew
+                    )
+                }
             }
         }
     }
 
-    private fun handleAction(action: PassesAction) {
+    fun onAction(action: PassesAction) {
         when (action) {
             PassesAction.DismissWhatsNew -> settingsRepo.setWhatsNewDismissed()
-            is PassesAction.FilterPasses -> applyFilter(action.hoursAhead, action.minElevation, uiState.value.modes)
-            is PassesAction.FilterRadios -> applyFilter(uiState.value.hours, uiState.value.elevation, action.modes)
+            is PassesAction.FilterPasses -> applyFilter(action.hoursAhead, action.minElevation, _uiState.value.modes)
+            is PassesAction.FilterRadios -> applyFilter(_uiState.value.hours, _uiState.value.elevation, action.modes)
             PassesAction.RefreshPasses -> refreshPasses()
-            PassesAction.TogglePassesDialog -> toggleFilterDialog()
-            PassesAction.ToggleRadiosDialog -> toggleRadiosDialog()
+            PassesAction.TogglePassesDialog -> _uiState.update { it.copy(isPassesDialogShown = !it.isPassesDialogShown) }
+            PassesAction.ToggleRadiosDialog -> _uiState.update { it.copy(isRadiosDialogShown = !it.isRadiosDialogShown) }
         }
     }
 
+    /** Computes live progress for each pass, filtering out expired ones. */
+    private fun computePassProgress(passList: List<OrbitalPass>, time: Long): List<OrbitalPass> {
+        val result = ArrayList<OrbitalPass>(passList.size)
+        for (pass in passList) {
+            if (!pass.isDeepSpace && time > pass.aosTime) {
+                val deltaNow = time.minus(pass.aosTime).toFloat()
+                val deltaTotal = pass.losTime.minus(pass.aosTime).toFloat()
+                val newProgress = (deltaNow / deltaTotal).round(2)
+                if (newProgress >= 1.0f) continue
+                if (newProgress != pass.progress) {
+                    result.add(pass.copy(progress = newProgress))
+                } else {
+                    result.add(pass)
+                }
+            } else {
+                result.add(pass)
+            }
+        }
+        return result
+    }
+
+    /** Resolves the next upcoming or active pass and its countdown timer. */
+    private fun resolveNextPass(
+        passes: List<OrbitalPass>,
+        timeNow: Long
+    ): Triple<OrbitalPass, String, Boolean> {
+        val upcoming = passes.firstOrNull { it.aosTime > timeNow }
+        if (upcoming != null) {
+            return Triple(upcoming, (upcoming.aosTime - timeNow).toTimerString(), true)
+        }
+        if (passes.isNotEmpty()) {
+            val lastPass = passes.last()
+            return Triple(lastPass, (lastPass.losTime - timeNow).toTimerString(), false)
+        }
+        return Triple(defaultPass, "00:00:00", true)
+    }
+
     private fun applyFilter(hoursAhead: Int, minElevation: Double, modes: List<String>) = viewModelScope.launch {
         _uiState.update { it.copy(isRefreshing = true) }
-        processing?.cancelAndJoin()
         settingsRepo.setPassesSettings(PassesSettings(hoursAhead, minElevation, modes))
         _uiState.update { it.copy(hours = hoursAhead, elevation = minElevation, modes = modes) }
         satelliteRepo.calculatePasses(System.currentTimeMillis(), hoursAhead, minElevation, modes)
+        _uiState.update { it.copy(isRefreshing = false) }
     }
 
     private fun refreshPasses() = viewModelScope.launch {
         _uiState.update { it.copy(isRefreshing = true) }
-        processing?.cancelAndJoin()
         val (hoursAhead, minElevation, modes) = settingsRepo.passesSettings.value
         satelliteRepo.calculatePasses(System.currentTimeMillis(), hoursAhead, minElevation, modes)
+        _uiState.update { it.copy(isRefreshing = false) }
     }
 
-    private fun setPassInfo(passes: List<OrbitalPass>, timeNow: Long) {
-        if (passes.isEmpty()) return
-        try {
-            val nextPass = passes.first { it.aosTime.minus(timeNow) > 0 }
-            val time = nextPass.aosTime.minus(timeNow).toTimerString()
-            _uiState.update { it.copy(nextPass = nextPass, nextTime = time, isNextTimeAos = true) }
-        } catch (_: NoSuchElementException) {
-            val lastPass = passes.last()
-            val time = lastPass.losTime.minus(timeNow).toTimerString()
-            _uiState.update { it.copy(nextPass = lastPass, nextTime = time, isNextTimeAos = false) }
-        }
-    }
-
-    private fun toggleFilterDialog() {
-        val currentDialogState = _uiState.value.isPassesDialogShown
-        _uiState.update { it.copy(isPassesDialogShown = currentDialogState.not()) }
-    }
-
-    private fun toggleRadiosDialog() {
-        val currentDialogState = _uiState.value.isRadiosDialogShown
-        _uiState.update { it.copy(isRadiosDialogShown = currentDialogState.not()) }
-    }
 
     companion object {
         val Factory: ViewModelProvider.Factory = viewModelFactory {

feature/radar/build.gradle.kts

@@ -1,5 +1,5 @@
 plugins {
-    alias(libs.plugins.convention.composeFeaturePlugin)
+    alias(libs.plugins.convention.featurePlugin)
 }
 
 android {

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarScreen.kt

@@ -37,14 +37,14 @@ import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material3.ElevatedCard
+import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.draw.rotate
 import androidx.compose.ui.keepScreenOn
 import androidx.compose.ui.res.painterResource
@@ -62,6 +62,7 @@ import androidx.navigation.NavGraphBuilder
 import androidx.navigation.compose.composable
 import androidx.navigation.navArgument
 import com.rtbishop.look4sat.core.domain.model.SatRadio
+import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
 import com.rtbishop.look4sat.core.domain.utility.toDegrees
 import com.rtbishop.look4sat.core.presentation.EmptyListCard
 import com.rtbishop.look4sat.core.presentation.IconCard
@@ -76,7 +77,10 @@ import com.rtbishop.look4sat.core.presentation.infiniteMarquee
 import com.rtbishop.look4sat.core.presentation.isVerticalLayout
 import com.rtbishop.look4sat.core.presentation.layoutPadding
 
-fun NavGraphBuilder.radarDestination(navigateUp: () -> Unit) {
+fun NavGraphBuilder.radarDestination(
+    navigateUp: () -> Unit,
+    navigateToRadioControl: (Int, Long) -> Unit = { _, _ -> }
+) {
     val radarRoute = "${Screen.Radar.route}?catNum={catNum}&aosTime={aosTime}"
     val radarArgs = listOf(
         navArgument("catNum") { defaultValue = 0 },
@@ -84,254 +88,216 @@ fun NavGraphBuilder.radarDestination(navigateUp: () -> Unit) {
     )
     composable(radarRoute, radarArgs) {
         val viewModel = viewModel(RadarViewModel::class.java, factory = RadarViewModel.Factory)
-        val uiState = viewModel.uiState.collectAsStateWithLifecycle().value
-        RadarScreen(uiState, navigateUp)
+        val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+        RadarScreen(uiState, viewModel::onAction, navigateUp, navigateToRadioControl)
     }
 }
 
 @Composable
-private fun RadarScreen(uiState: RadarState, navigateUp: () -> Unit) {
-//    BluetoothCIV.init(LocalContext.current)
-    val addToCalendar: () -> Unit = {
-        uiState.currentPass?.let { pass ->
-            uiState.sendAction(RadarAction.AddToCalendar(pass.name, pass.aosTime, pass.losTime))
-        }
-    }
+private fun RadarScreen(
+    uiState: RadarState,
+    onAction: (RadarAction) -> Unit,
+    navigateUp: () -> Unit,
+    navigateToRadioControl: (Int, Long) -> Unit
+) {
     val upcomingPass = uiState.currentPass ?: getDefaultPass()
     if (upcomingPass.losTime < System.currentTimeMillis()) navigateUp()
+
+    val addToCalendar: () -> Unit = {
+        uiState.currentPass?.let { pass ->
+            onAction(RadarAction.AddToCalendar(pass.name, pass.aosTime, pass.losTime))
+        }
+    }
+    val openRadioControl: () -> Unit = {
+        uiState.currentPass?.let { pass ->
+            navigateToRadioControl(pass.catNum, pass.aosTime)
+        }
+    }
     Column(
         modifier = Modifier
             .layoutPadding()
-            .keepScreenOn(), verticalArrangement = Arrangement.spacedBy(6.dp)
+            .keepScreenOn(),
+        verticalArrangement = Arrangement.spacedBy(6.dp)
     ) {
-        if (isVerticalLayout()) {
+        val isVertical = isVerticalLayout()
+        if (isVertical) {
             TopBar {
-                IconCard(action = navigateUp, resId = R.drawable.ic_back)
-                TimerRow(timeString = uiState.currentTime, isTimeAos = uiState.isCurrentTimeAos)
                 IconCard(action = addToCalendar, resId = R.drawable.ic_calendar)
+                TimerRow(timeString = uiState.currentTime, isTimeAos = uiState.isCurrentTimeAos)
+                IconCard(action = openRadioControl, resId = R.drawable.ic_radios)
             }
-            TopBar { NextPassRow(pass = upcomingPass) }
+            TopBar { NextPassRow(pass = upcomingPass, isUtc = uiState.isUtc) }
         } else {
             TopBar {
-                IconCard(action = navigateUp, resId = R.drawable.ic_back)
-                TimerRow(timeString = uiState.currentTime, isTimeAos = uiState.isCurrentTimeAos)
-                NextPassRow(pass = upcomingPass, modifier = Modifier.weight(1f))
                 IconCard(action = addToCalendar, resId = R.drawable.ic_calendar)
+                TimerRow(timeString = uiState.currentTime, isTimeAos = uiState.isCurrentTimeAos)
+                NextPassRow(pass = upcomingPass, modifier = Modifier.weight(1f), isUtc = uiState.isUtc)
+                IconCard(action = openRadioControl, resId = R.drawable.ic_radios)
             }
         }
-        if(isVerticalLayout()) {
-            ElevatedCard(modifier = Modifier.weight(1f)) {
-                Box(contentAlignment = Alignment.Center) {
-                    if (uiState.orbitalPos == null) {
-                        ElevatedCard(modifier = Modifier.fillMaxSize()) {
-                            EmptyListCard(message = "")
-                        }
-                    }
-                    uiState.orbitalPos?.let { position ->
-                        RadarViewCompose(
-                            item = position,
-                            items = uiState.satTrack,
-                            azimElev = uiState.orientationValues,
-                            shouldShowSweep = uiState.shouldShowSweep,
-                            shouldUseCompass = uiState.shouldUseCompass,
-                            modifier = Modifier.align(Alignment.Center)
-                        )
-                        Column(
-                            verticalArrangement = Arrangement.SpaceBetween,
-                            modifier = Modifier
-                                .fillMaxSize()
-                                .padding(horizontal = 6.dp, vertical = 4.dp)
-                        ) {
-                            Row(
-                                horizontalArrangement = Arrangement.SpaceBetween,
-                                modifier = Modifier.fillMaxWidth()
-                            ) {
-                                RadarTextTop(
-                                    position.azimuth,
-                                    stringResource(R.string.radar_az_text),
-                                    true
-                                )
-                                RadarTextTop(
-                                    position.elevation,
-                                    stringResource(R.string.radar_el_text),
-                                    false
-                                )
-                            }
-                            Row(
-                                horizontalArrangement = Arrangement.SpaceBetween,
-                                modifier = Modifier.fillMaxWidth()
-                            ) {
-                                RadarTextBottom(
-                                    position.altitude,
-                                    stringResource(R.string.radar_alt_text),
-                                    true
-                                )
-                                RadarTextBottom(
-                                    position.distance,
-                                    stringResource(R.string.radar_dist_text),
-                                    false
-                                )
-                            }
-                        }
-                    }
-                }
-            }
-            ElevatedCard(modifier = Modifier.weight(1f)) {
-                if (uiState.transmitters.isEmpty()) {
-                    Box(contentAlignment = Alignment.Center, modifier = Modifier.fillMaxSize()) {
-                        Column(
-                            horizontalAlignment = Alignment.CenterHorizontally,
-                            verticalArrangement = Arrangement.spacedBy(24.dp),
-                            modifier = Modifier.padding(32.dp)
-                        ) {
-                            Text(text = """¯\_(ツ)_/¯""", fontSize = 32.sp)
-                            Text(
-                                text = stringResource(R.string.empty_list_message),
-                                fontSize = 21.sp,
-                                textAlign = TextAlign.Center
-                            )
-                            Text(
-                                text = stringResource(R.string.radar_no_data),
-                                fontSize = 18.sp,
-                                textAlign = TextAlign.Center
-                            )
-                        }
-                    }
-                } else {
-                    Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
-                        TransmittersList(
-                            transmitters = uiState.transmitters,
-                            selectedUuid = uiState.selectedTransmitterUuid,
-                            onSelect = { uuid ->
-                                if (uiState.selectedTransmitterUuid != null) {
-                                    uiState.sendAction(RadarAction.SelectTransmitter(uuid))
-                                }
-                            }
-                        )
-                        if (uiState.orbitalPos?.eclipsed == true) {
-                            EclipsedIndicator()
-                        }
-                    }
-                }
-            }
+        if (isVertical) {
+            RadarCard(uiState, Modifier.weight(1f))
+            TransmittersCard(uiState.transmitters, uiState.selectedTransmitterUuid, onAction, Modifier.weight(1f))
         } else {
             Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
-                ElevatedCard(modifier = Modifier.weight(1f)) {
-                    Box(contentAlignment = Alignment.Center) {
-                        if (uiState.orbitalPos == null) {
-                            ElevatedCard(modifier = Modifier.fillMaxSize()) {
-                                EmptyListCard(message = "")
-                            }
-                        }
-                        uiState.orbitalPos?.let { position ->
-                            RadarViewCompose(
-                                item = position,
-                                items = uiState.satTrack,
-                                azimElev = uiState.orientationValues,
-                                shouldShowSweep = uiState.shouldShowSweep,
-                                shouldUseCompass = uiState.shouldUseCompass,
-                                modifier = Modifier.align(Alignment.Center)
-                            )
-                            Column(
-                                verticalArrangement = Arrangement.SpaceBetween,
-                                modifier = Modifier
-                                    .fillMaxSize()
-                                    .padding(horizontal = 6.dp, vertical = 4.dp)
-                            ) {
-                                Row(
-                                    horizontalArrangement = Arrangement.SpaceBetween,
-                                    modifier = Modifier.fillMaxWidth()
-                                ) {
-                                    RadarTextTop(
-                                        position.azimuth,
-                                        stringResource(R.string.radar_az_text),
-                                        true
-                                    )
-                                    RadarTextTop(
-                                        position.elevation,
-                                        stringResource(R.string.radar_el_text),
-                                        false
-                                    )
-                                }
-                                Row(
-                                    horizontalArrangement = Arrangement.SpaceBetween,
-                                    modifier = Modifier.fillMaxWidth()
-                                ) {
-                                    RadarTextBottom(
-                                        position.altitude,
-                                        stringResource(R.string.radar_alt_text),
-                                        true
-                                    )
-                                    RadarTextBottom(
-                                        position.distance,
-                                        stringResource(R.string.radar_dist_text),
-                                        false
-                                    )
-                                }
-                            }
-                        }
-                    }
-                }
-                ElevatedCard(modifier = Modifier.weight(1f)) {
-                    if (uiState.transmitters.isEmpty()) {
-                        Box(contentAlignment = Alignment.Center, modifier = Modifier.fillMaxSize()) {
-                            Column(
-                                horizontalAlignment = Alignment.CenterHorizontally,
-                                verticalArrangement = Arrangement.spacedBy(24.dp),
-                                modifier = Modifier.padding(32.dp)
-                            ) {
-                                Text(text = """¯\_(ツ)_/¯""", fontSize = 32.sp)
-                                Text(
-                                    text = stringResource(R.string.empty_list_message),
-                                    fontSize = 21.sp,
-                                    textAlign = TextAlign.Center
-                                )
-                                Text(
-                                    text = stringResource(R.string.radar_no_data),
-                                    fontSize = 18.sp,
-                                    textAlign = TextAlign.Center
-                                )
-                            }
-                        }
-                    } else {
-                        Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
-                            TransmittersList(
-                                transmitters = uiState.transmitters,
-                                selectedUuid = uiState.selectedTransmitterUuid,
-                                onSelect = { uuid ->
-                                    if (uiState.selectedTransmitterUuid != null) {
-                                        uiState.sendAction(RadarAction.SelectTransmitter(uuid))
-                                    }
-                                }
-                            )
-                            if (uiState.orbitalPos?.eclipsed == true) {
-                                EclipsedIndicator()
-                            }
-                        }
-                    }
-                }
+                RadarCard(uiState, Modifier.weight(1f))
+                TransmittersCard(uiState.transmitters, uiState.selectedTransmitterUuid, onAction, Modifier.weight(1f))
             }
         }
     }
 }
 
 @Composable
-private fun RadarTextTop(value: Double, text: String, isLeft: Boolean) {
-    val alignment = if (isLeft) Alignment.Start else Alignment.End
-    val degValue = stringResource(R.string.radar_az_value, value.toDegrees())
-    Column(horizontalAlignment = alignment) {
-        Text(text = degValue, fontSize = 18.sp)
-        Text(text = text, fontSize = 15.sp)
+private fun RadarCard(uiState: RadarState, modifier: Modifier = Modifier) {
+    val isEclipsed = uiState.orbitalPos?.eclipsed == true
+    val borderModifier = if (isEclipsed) {
+        val infiniteTransition = rememberInfiniteTransition(label = "eclipsedBorder")
+        val borderAlpha by infiniteTransition.animateFloat(
+            initialValue = 1.0f,
+            targetValue = 0.0f,
+            animationSpec = infiniteRepeatable(
+                animation = tween(durationMillis = 1000, delayMillis = 25, easing = LinearEasing),
+                repeatMode = RepeatMode.Reverse
+            ),
+            label = "eclipsedBorderAlpha"
+        )
+        Modifier.border(
+            width = 0.5.dp,
+            color = MaterialTheme.colorScheme.primary.copy(alpha = borderAlpha),
+            shape = MaterialTheme.shapes.medium
+        )
+    } else {
+        Modifier
+    }
+    ElevatedCard(modifier = modifier.then(borderModifier)) {
+        Box(contentAlignment = Alignment.Center) {
+            val position = uiState.orbitalPos
+            if (position == null) {
+                ElevatedCard(modifier = Modifier.fillMaxSize()) {
+                    EmptyListCard(message = "")
+                }
+            } else {
+                RadarViewCompose(
+                    item = position,
+                    items = uiState.satTrack,
+                    azimElev = uiState.orientationValues,
+                    shouldShowSweep = uiState.shouldShowSweep,
+                    shouldUseCompass = uiState.shouldUseCompass,
+                    modifier = Modifier.align(Alignment.Center)
+                )
+                PositionOverlay(position)
+            }
+        }
     }
 }
 
 @Composable
-private fun RadarTextBottom(value: Double, text: String, isLeft: Boolean) {
-    val alignment = if (isLeft) Alignment.Start else Alignment.End
-    val degValue = stringResource(R.string.radar_alt_value, value)
+private fun PositionOverlay(position: OrbitalPos) {
+    Column(
+        verticalArrangement = Arrangement.SpaceBetween,
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(horizontal = 6.dp, vertical = 4.dp)
+    ) {
+        Row(
+            horizontalArrangement = Arrangement.SpaceBetween,
+            modifier = Modifier.fillMaxWidth()
+        ) {
+            RadarLabel(
+                value = stringResource(R.string.radar_az_value, position.azimuth.toDegrees()),
+                label = stringResource(R.string.radar_az_text),
+                alignment = Alignment.Start,
+                labelFirst = false
+            )
+            RadarLabel(
+                value = stringResource(R.string.radar_az_value, position.elevation.toDegrees()),
+                label = stringResource(R.string.radar_el_text),
+                alignment = Alignment.End,
+                labelFirst = false
+            )
+        }
+        Row(
+            horizontalArrangement = Arrangement.SpaceBetween,
+            modifier = Modifier.fillMaxWidth()
+        ) {
+            RadarLabel(
+                value = stringResource(R.string.radar_alt_value, position.altitude),
+                label = stringResource(R.string.radar_alt_text),
+                alignment = Alignment.Start,
+                labelFirst = true
+            )
+            RadarLabel(
+                value = stringResource(R.string.radar_alt_value, position.distance),
+                label = stringResource(R.string.radar_dist_text),
+                alignment = Alignment.End,
+                labelFirst = true
+            )
+        }
+    }
+}
+
+@Composable
+private fun RadarLabel(
+    value: String,
+    label: String,
+    alignment: Alignment.Horizontal,
+    labelFirst: Boolean
+) {
     Column(horizontalAlignment = alignment) {
-        Text(text = text, fontSize = 15.sp)
-        Text(text = degValue, fontSize = 18.sp)
+        if (labelFirst) {
+            Text(text = label, fontSize = 15.sp)
+            Text(text = value, fontSize = 18.sp)
+        } else {
+            Text(text = value, fontSize = 18.sp)
+            Text(text = label, fontSize = 15.sp)
+        }
+    }
+}
+
+@Composable
+private fun TransmittersCard(
+    transmitters: List<SatRadio>,
+    selectedUuid: String?,
+    onAction: (RadarAction) -> Unit,
+    modifier: Modifier = Modifier
+) {
+    ElevatedCard(modifier = modifier) {
+        if (transmitters.isEmpty()) {
+            EmptyTransmittersContent()
+        } else {
+            TransmittersList(
+                transmitters = transmitters,
+                selectedUuid = selectedUuid,
+                onSelect = { uuid ->
+                    if (selectedUuid != null) {
+                        onAction(RadarAction.SelectTransmitter(uuid))
+                    }
+                }
+            )
+        }
+    }
+}
+
+@Composable
+private fun EmptyTransmittersContent() {
+    Box(contentAlignment = Alignment.Center, modifier = Modifier.fillMaxSize()) {
+        Column(
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.spacedBy(24.dp),
+            modifier = Modifier.padding(32.dp)
+        ) {
+            Text(text = """¯\_(ツ)_/¯""", fontSize = 32.sp)
+            Text(
+                text = stringResource(R.string.empty_list_message),
+                fontSize = 21.sp,
+                textAlign = TextAlign.Center
+            )
+            Text(
+                text = stringResource(R.string.radar_no_data),
+                fontSize = 18.sp,
+                textAlign = TextAlign.Center
+            )
+        }
     }
 }
 
@@ -342,12 +308,13 @@ private fun TransmittersList(
     onSelect: (String) -> Unit
 ) {
     LazyColumn(modifier = Modifier.fillMaxSize()) {
-        items(items = transmitters, key = { item -> item.uuid }) { radio ->
+        items(items = transmitters, key = { it.uuid }) { radio ->
             TransmitterItem(
-                radio,
-                (selectedUuid != null),
-                (radio.uuid == selectedUuid)
-            ) { onSelect(radio.uuid) }
+                radio = radio,
+                isClickable = selectedUuid != null,
+                isSelected = radio.uuid == selectedUuid,
+                onClick = { onSelect(radio.uuid) }
+            )
         }
     }
 }
@@ -362,42 +329,6 @@ private fun TransmitterItemPreview() {
     MainTheme { TransmitterItem(transmitter, isClickable = true, isSelected = true, onClick = {}) }
 }
 
-@Composable
-private fun EclipsedIndicator() {
-    val bgColor = MaterialTheme.colorScheme.primary
-    val bgShape = MaterialTheme.shapes.medium
-    val infiniteTransition = rememberInfiniteTransition()
-    val textAlpha = infiniteTransition.animateFloat(
-        initialValue = 1.0f,
-        targetValue = 0.0f,
-        animationSpec = infiniteRepeatable(
-            animation = tween(
-                durationMillis = 1000,
-                delayMillis = 25,
-                easing = LinearEasing
-            ),
-            repeatMode = RepeatMode.Reverse
-        )
-    )
-    Box(
-        modifier = Modifier
-            .fillMaxSize()
-            .alpha(textAlpha.value)
-            .border(width = 2.dp, color = bgColor, shape = bgShape),
-        contentAlignment = Alignment.Center
-    ) {
-        Text(
-            text = stringResource(R.string.radar_eclipsed),
-            fontSize = 18.sp,
-            fontWeight = FontWeight.Medium,
-            color = MaterialTheme.colorScheme.background,
-            modifier = Modifier
-                .background(color = bgColor, shape = bgShape)
-                .padding(12.dp)
-        )
-    }
-}
-
 @Composable
 private fun TransmitterItem(
     radio: SatRadio,
@@ -407,85 +338,92 @@ private fun TransmitterItem(
 ) {
     val title = if (radio.isInverted) "INVERTED: ${radio.info}" else radio.info
     val fullTitle = "$title - (${radio.downlinkMode ?: "--"}/${radio.uplinkMode ?: "--"})"
-    Surface(
-        color = MaterialTheme.colorScheme.background,
+    Column(
         modifier = Modifier
             .fillMaxWidth()
             .then(if (isClickable) Modifier.clickable { onClick() } else Modifier)
     ) {
-        Surface(modifier = Modifier.padding(bottom = 2.dp)) {
-            Column(
-                horizontalAlignment = Alignment.CenterHorizontally,
-                verticalArrangement = Arrangement.spacedBy(6.dp),
-                modifier = Modifier
-                    .background(MaterialTheme.colorScheme.surface)
-                    .padding(horizontal = 8.dp, vertical = 6.dp)
-            ) {
-                Box {
-                    Text(
-                        text = fullTitle,
-                        textAlign = TextAlign.Center,
-                        modifier = Modifier
-                            .fillMaxWidth()
-                            .padding(horizontal = 6.dp)
-                            .infiniteMarquee()
+        Column(
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.spacedBy(6.dp),
+            modifier = Modifier
+                .fillMaxWidth()
+                .background(MaterialTheme.colorScheme.surface)
+                .padding(horizontal = 8.dp, vertical = 6.dp)
+        ) {
+            Box {
+                Text(
+                    text = fullTitle,
+                    textAlign = TextAlign.Center,
+                    color = MaterialTheme.colorScheme.onSurface,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 6.dp)
+                        .infiniteMarquee()
+                )
+                if (isSelected) {
+                    Icon(
+                        painter = painterResource(id = R.drawable.ic_radios),
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.primary,
+                        modifier = Modifier.background(color = MaterialTheme.colorScheme.surface)
                     )
-                    if (isSelected) {
-                        Icon(
-                            painter = painterResource(id = R.drawable.ic_radios),
-                            contentDescription = null,
-                            tint = MaterialTheme.colorScheme.primary,
-                            modifier = Modifier.background(color = MaterialTheme.colorScheme.surface)
-                        )
-                    }
                 }
-                FrequencyRow(radio = radio, isDownlink = true)
-                FrequencyRow(radio = radio, isDownlink = false)
             }
+            FrequencyRow(radio = radio, isDownlink = true)
+            FrequencyRow(radio = radio, isDownlink = false)
         }
+        HorizontalDivider(thickness = 2.dp, color = MaterialTheme.colorScheme.background)
     }
 }
 
 @Composable
-private fun FrequencyRow(radio: SatRadio, isDownlink: Boolean, modifier: Modifier = Modifier) {
-    Row(verticalAlignment = Alignment.CenterVertically, modifier = modifier.fillMaxWidth()) {
-        val rotateMod = Modifier.rotate(if (isDownlink) 90f else -90f)
-        val weightMod = Modifier.weight(1f)
-        val desc = if (isDownlink) stringResource(R.string.radar_downlink) else stringResource(R.string.radar_uplink)
+private fun FrequencyRow(radio: SatRadio, isDownlink: Boolean) {
+    Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.fillMaxWidth()) {
+        val desc = if (isDownlink) stringResource(R.string.radar_downlink)
+        else stringResource(R.string.radar_uplink)
         Text(
             text = if (isDownlink) "D:" else "U:",
             textAlign = TextAlign.Center,
             fontSize = 18.sp,
             color = MaterialTheme.colorScheme.onSurface,
-            modifier = modifier
-                .size(width = 24.dp, height = 24.dp)
+            modifier = Modifier
+                .size(24.dp)
                 .semantics { contentDescription = desc }
         )
-        FrequencyText(if (isDownlink) radio.downlinkLow else radio.uplinkLow, weightMod)
+        FrequencyText(
+            frequency = if (isDownlink) radio.downlinkLow else radio.uplinkLow,
+            modifier = Modifier.weight(1f)
+        )
         Text(
             text = "-",
             textAlign = TextAlign.Center,
             fontSize = 21.sp,
             fontWeight = FontWeight.Bold,
-            color = MaterialTheme.colorScheme.primary,
-            modifier = modifier
+            color = MaterialTheme.colorScheme.primary
+        )
+        FrequencyText(
+            frequency = if (isDownlink) radio.downlinkHigh else radio.uplinkHigh,
+            modifier = Modifier.weight(1f)
         )
-        FrequencyText(if (isDownlink) radio.downlinkHigh else radio.uplinkHigh, weightMod)
         Icon(
             painter = painterResource(id = R.drawable.ic_arrow),
             tint = MaterialTheme.colorScheme.onSurface,
             contentDescription = null,
-            modifier = rotateMod.size(width = 24.dp, height = 24.dp)
+            modifier = Modifier
+                .rotate(if (isDownlink) 90f else -90f)
+                .size(24.dp)
         )
     }
 }
 
 @Composable
 private fun FrequencyText(frequency: Long?, modifier: Modifier = Modifier) {
-    val noLinkText = stringResource(R.string.radar_no_link)
-    val freqValue = frequency?.let { it / 1000000f }
+    val text = frequency?.let {
+        stringResource(id = R.string.radar_link_low, it / 1000000f)
+    } ?: stringResource(R.string.radar_no_link)
     Text(
-        text = freqValue?.let { stringResource(id = R.string.radar_link_low, it) } ?: noLinkText,
+        text = text,
         textAlign = TextAlign.Center,
         fontSize = 21.sp,
         fontWeight = FontWeight.Bold,

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarState.kt

@@ -22,21 +22,21 @@ import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
 
 data class RadarState(
-    val currentPass: OrbitalPass?,
-    val currentTime: String,
-    val isCurrentTimeAos: Boolean,
-    val orientationValues: Pair<Float, Float>,
-    val orbitalPos: OrbitalPos?,
-    val satTrack: List<OrbitalPos>,
-    val shouldShowSweep: Boolean,
-    val shouldUseCompass: Boolean,
-    val transmitters: List<SatRadio>,
-    val selectedTransmitterUuid: String?,
-    val selectedFrequency: Long?,
-    val sendAction: (RadarAction) -> Unit
+    val currentPass: OrbitalPass? = null,
+    val currentTime: String = "00:00:00",
+    val isCurrentTimeAos: Boolean = true,
+    val isUtc: Boolean = false,
+    val orientationValues: Pair<Float, Float> = 0f to 0f,
+    val orbitalPos: OrbitalPos? = null,
+    val satTrack: List<OrbitalPos> = emptyList(),
+    val shouldShowSweep: Boolean = false,
+    val shouldUseCompass: Boolean = false,
+    val transmitters: List<SatRadio> = emptyList(),
+    val selectedTransmitterUuid: String? = null,
+    val selectedFrequency: Long? = null
 )
 
-sealed class RadarAction {
-    data class AddToCalendar(val name: String, val aosTime: Long, val losTime: Long) : RadarAction()
-    data class SelectTransmitter(val uuid: String) : RadarAction()
+sealed interface RadarAction {
+    data class AddToCalendar(val name: String, val aosTime: Long, val losTime: Long) : RadarAction
+    data class SelectTransmitter(val uuid: String) : RadarAction
 }

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarView.kt

@@ -17,6 +17,8 @@
  */
 package com.rtbishop.look4sat.feature.radar
 
+import androidx.compose.animation.core.LinearEasing
+import androidx.compose.animation.core.RepeatMode
 import androidx.compose.animation.core.animateFloat
 import androidx.compose.animation.core.infiniteRepeatable
 import androidx.compose.animation.core.rememberInfiniteTransition
@@ -25,9 +27,11 @@ import androidx.compose.foundation.Canvas
 import androidx.compose.foundation.layout.aspectRatio
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableFloatStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.geometry.Offset
 import androidx.compose.ui.graphics.Color
@@ -53,6 +57,10 @@ import com.rtbishop.look4sat.core.domain.utility.toRadians
 import kotlin.math.cos
 import kotlin.math.sin
 
+private const val CIRCLES = 3
+private const val STROKE_WIDTH = 6f
+private const val SWEEP_INCREMENT = 360f / 12f / 60f
+
 @Composable
 fun RadarViewCompose(
     item: OrbitalPos,
@@ -62,149 +70,102 @@ fun RadarViewCompose(
     shouldUseCompass: Boolean,
     modifier: Modifier = Modifier
 ) {
-//    val context = LocalContext.current
-//    val view = LocalView.current
     val radarColor = MaterialTheme.colorScheme.secondary
     val trackColor = MaterialTheme.colorScheme.primary
     val aimColor = MaterialTheme.colorScheme.error
-    val strokeWidth = 6f
     val animTransition = rememberInfiniteTransition(label = "animScale")
-    val animSpec = infiniteRepeatable<Float>(tween(1000))
-    val animScale = animTransition.animateFloat(16f, 64f, animSpec, label = "animScale")
-//    val aimThreshold = 0.05f
+    val animScale by animTransition.animateFloat(
+        initialValue = 16f,
+        targetValue = 64f,
+        animationSpec = infiniteRepeatable(tween(1000)),
+        label = "animScale"
+    )
+    val eclipsedGlowAlpha by animTransition.animateFloat(
+        initialValue = 1.0f,
+        targetValue = 0.0f,
+        animationSpec = infiniteRepeatable(
+            animation = tween(durationMillis = 1000, delayMillis = 25, easing = LinearEasing),
+            repeatMode = RepeatMode.Reverse
+        ),
+        label = "eclipsedGlowAlpha"
+    )
     val measurer = rememberTextMeasurer()
-    val sweepDegrees = remember { mutableFloatStateOf(0f) }
-    val trackLastRadius = remember { mutableStateOf(0f) }
-    val trackPath = remember { mutableStateOf(Path()) }
-    val trackEffect = remember { mutableStateOf(PathEffect.cornerPathEffect(0f)) }
-//    val soundPool = remember { mutableStateOf<SoundPool?>(null) }
-//    val beepSoundId = remember { mutableIntStateOf(0) }
-//    val aimTargetDifference = remember { mutableFloatStateOf(0f) }
-
-//    LaunchedEffect(item.azimuth, item.elevation, azimElev.first, azimElev.second) {
-//        val aimAzimuthRadians = azimElev.first.toDouble().toRadians()
-//        val aimElevationRadians = abs(min(azimElev.second, 0f)).toDouble().toRadians()
-//        // radius of 0.5 makes the aimTargetDifference range 0.0 to 1.0
-//        val radius = 0.5
-//        val aimX = sph2CartX(aimAzimuthRadians, aimElevationRadians, radius)
-//        val aimY = sph2CartY(aimAzimuthRadians, aimElevationRadians, radius)
-//        val satX = sph2CartX(item.azimuth, item.elevation, radius)
-//        val satY = sph2CartY(item.azimuth, item.elevation, radius)
-//        aimTargetDifference.floatValue = sqrt((satX - aimX).pow(2) + (satY - aimY).pow(2))
-//        val minPlaybackRate = 0.5f
-//        val maxPlaybackRate = 2.0f
-//        val playbackRate =
-//            maxPlaybackRate - (aimTargetDifference.floatValue / (maxPlaybackRate - minPlaybackRate))
-//        soundPool.value?.setRate(beepSoundId.intValue, playbackRate)
-//    }
-//
-//    LaunchedEffect(aimTargetDifference.floatValue < aimThreshold) {
-//        if (aimTargetDifference.floatValue < aimThreshold) {
-//            view.performHapticFeedback(HapticFeedbackConstantsCompat.VIRTUAL_KEY)
-//            soundPool.value?.pause(beepSoundId.intValue)
-//        } else {
-//            soundPool.value?.resume(beepSoundId.intValue)
-//        }
-//    }
-//
-//    LaunchedEffect(item.elevation > 0) {
-//        if(item.elevation > 0) {
-//            soundPool.value?.resume(beepSoundId.intValue)
-//        } else {
-//            soundPool.value?.pause(beepSoundId.intValue)
-//        }
-//    }
-//
-//    DisposableEffect(Unit) {
-//        val audioAttributes = AudioAttributes.Builder()
-//            .setUsage(AudioAttributes.USAGE_ASSISTANCE_SONIFICATION)
-//            .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
-//            .build()
-//        soundPool.value = SoundPool.Builder()
-//            .setMaxStreams(1)
-//            .setAudioAttributes(audioAttributes)
-//            .build()
-//        beepSoundId.intValue = soundPool.value?.load(context, R.raw.beep, 1) ?: 0
-//        soundPool.value?.setOnLoadCompleteListener { soundPool, _, status ->
-//            if (status == 0) {
-//                soundPool.play(beepSoundId.intValue, 0.5f, 0.5f, 0, -1, 1f)
-//            }
-//        }
-//        onDispose {
-//            soundPool.value?.release()
-//        }
-//    }
+    var sweepDegrees by remember { mutableFloatStateOf(0f) }
+    var cachedRadius by remember { mutableFloatStateOf(0f) }
+    var trackPath by remember { mutableStateOf(Path()) }
+    var trackEffect by remember { mutableStateOf(PathEffect.cornerPathEffect(0f)) }
+    val isEclipsed = item.eclipsed
 
     Canvas(modifier = modifier.aspectRatio(1f)) {
-        val radius = (size.minDimension / 2f) * 0.95f
-        if(radius != trackLastRadius.value) {
-            trackPath.value = createTrackPath(items, radius)
-            trackEffect.value = createTrackEffect(trackPath.value)
-            trackLastRadius.value = radius
+        val radius = size.minDimension / 2f * 0.95f
+        if (radius != cachedRadius) {
+            trackPath = createTrackPath(items, radius)
+            trackEffect = createTrackEffect(trackPath)
+            cachedRadius = radius
         }
         rotate(if (shouldUseCompass) -azimElev.first else 0f) {
-            if (shouldShowSweep) {
-                drawSweep(center, sweepDegrees.floatValue, radius, trackColor)
-            }
-            drawRadar(radius, radarColor, strokeWidth, 3)
-            drawInfo(radius, trackColor, measurer, 3)
+            if (shouldShowSweep) drawSweep(center, sweepDegrees, radius, trackColor)
+            drawRadar(radius, radarColor)
+            drawElevationLabels(radius, trackColor, measurer)
             translate(center.x, center.y) {
-                drawTrack(trackPath.value, trackEffect.value, aimColor, trackColor)
+                drawTrack(trackPath, trackEffect, aimColor, trackColor)
                 if (item.elevation > 0) {
-                    drawPosition(item, radius, animScale.value, trackColor)
-                }
-                if (shouldUseCompass) {
-                    drawAim(azimElev.first, azimElev.second, radius, strokeWidth, aimColor)
+                    if (isEclipsed) {
+                        drawEclipsedPosition(item, radius, eclipsedGlowAlpha, trackColor)
+                    } else {
+                        drawPosition(item, radius, animScale, trackColor)
+                    }
                 }
+                if (shouldUseCompass) drawAim(azimElev.first, azimElev.second, radius, aimColor)
             }
-            sweepDegrees.floatValue = (sweepDegrees.floatValue + 360 / 12.0f / 60) % 360
+            sweepDegrees = (sweepDegrees + SWEEP_INCREMENT) % 360f
         }
     }
 }
 
-private fun DrawScope.drawRadar(radius: Float, color: Color, width: Float, circles: Int) {
-    for (i in 0 until circles) {
-        val circleRadius = radius - radius / circles.toFloat() * i.toFloat()
-        drawCircle(color, circleRadius, style = Stroke(width))
+private fun DrawScope.drawRadar(radius: Float, color: Color) {
+    val step = radius / CIRCLES
+    for (i in 0 until CIRCLES) {
+        drawCircle(color, radius - step * i, style = Stroke(STROKE_WIDTH))
     }
-    drawLine(color, center.copy(x = center.x - radius), center.copy(x = center.x + radius), width)
-    drawLine(color, center.copy(y = center.y - radius), center.copy(y = center.y + radius), width)
+    drawLine(color, Offset(center.x - radius, center.y), Offset(center.x + radius, center.y), STROKE_WIDTH)
+    drawLine(color, Offset(center.x, center.y - radius), Offset(center.x, center.y + radius), STROKE_WIDTH)
 }
 
-private fun DrawScope.drawInfo(radius: Float, color: Color, measurer: TextMeasurer, circles: Int) {
-    for (i in 0 until circles) {
-        val textY = (radius - radius / circles * i) - 32f
-        val textDeg = " ${(90 / circles) * (circles - i)}°"
-        drawText(measurer, textDeg, center.copy(y = textY), style = TextStyle(color, 15.sp))
+private fun DrawScope.drawElevationLabels(radius: Float, color: Color, measurer: TextMeasurer) {
+    val step = radius / CIRCLES
+    val degStep = 90 / CIRCLES
+    val style = TextStyle(color, 15.sp)
+    for (i in 0 until CIRCLES) {
+        val textY = (radius - step * i) - 32f
+        drawText(measurer, " ${degStep * (CIRCLES - i)}°", Offset(center.x, textY), style = style)
     }
 }
 
 private fun DrawScope.drawTrack(path: Path, effect: PathEffect, color: Color, effectColor: Color) {
-    drawPath(path, color, style = Stroke(6f))
+    drawPath(path, color, style = Stroke(STROKE_WIDTH))
     drawPath(path, effectColor, style = Stroke(pathEffect = effect))
 }
 
 private fun DrawScope.drawPosition(item: OrbitalPos, radius: Float, posRadius: Float, color: Color) {
-    val satX = sph2CartX(item.azimuth, item.elevation, radius.toDouble())
-    val satY = sph2CartY(item.azimuth, item.elevation, radius.toDouble())
-    drawCircle(color, 16f, center.copy(satX, -satY))
-    drawCircle(color.copy(alpha = 1 - (posRadius / 64f)), posRadius, center.copy(satX, -satY))
+    val pos = sph2Cart(item.azimuth, item.elevation, radius.toDouble())
+    drawCircle(color, 16f, pos)
+    drawCircle(color.copy(alpha = 1 - (posRadius / 64f)), posRadius, pos)
 }
 
-private fun DrawScope.drawAim(azim: Float, elev: Float, radius: Float, width: Float, color: Color) {
+private fun DrawScope.drawEclipsedPosition(item: OrbitalPos, radius: Float, glowAlpha: Float, color: Color) {
+    val pos = sph2Cart(item.azimuth, item.elevation, radius.toDouble())
+    drawCircle(color.copy(alpha = glowAlpha), 16f, pos)
+}
+
+private fun DrawScope.drawAim(azim: Float, elev: Float, radius: Float, color: Color) {
     val size = 36f
-    val azimRadians = azim.toDouble().toRadians()
-    val tempElevRadians = elev.toDouble().toRadians()
-    val elevRadians = if (tempElevRadians > 0.0) 0.0 else tempElevRadians
-    val aimX = sph2CartX(azimRadians, -elevRadians, radius.toDouble())
-    val aimY = sph2CartY(azimRadians, -elevRadians, radius.toDouble())
-    try {
-        drawLine(color, center.copy(aimX - size, -aimY), center.copy(aimX + size, -aimY), width)
-        drawLine(color, center.copy(aimX, -aimY - size), center.copy(aimX, -aimY + size), width)
-        drawCircle(color, size / 2, center.copy(aimX, -aimY), style = Stroke(width))
-    } catch (exception: Exception) {
-        println(exception)
-    }
+    val azimRad = azim.toDouble().toRadians()
+    val elevRad = elev.toDouble().toRadians().coerceAtMost(0.0)
+    val pos = sph2Cart(azimRad, -elevRad, radius.toDouble())
+    drawLine(color, Offset(pos.x - size, pos.y), Offset(pos.x + size, pos.y), STROKE_WIDTH)
+    drawLine(color, Offset(pos.x, pos.y - size), Offset(pos.x, pos.y + size), STROKE_WIDTH)
+    drawCircle(color, size / 2, pos, style = Stroke(STROKE_WIDTH))
 }
 
 private fun DrawScope.drawSweep(center: Offset, degrees: Float, radius: Float, color: Color) {
@@ -216,37 +177,34 @@ private fun DrawScope.drawSweep(center: Offset, degrees: Float, radius: Float, c
 
 private fun createTrackPath(positions: List<OrbitalPos>, radius: Float): Path {
     val trackPath = Path()
-    positions.forEachIndexed { index, satPos ->
-        val passX = sph2CartX(satPos.azimuth, satPos.elevation, radius.toDouble())
-        val passY = sph2CartY(satPos.azimuth, satPos.elevation, radius.toDouble())
-        if (index == 0) trackPath.moveTo(passX, -passY) else trackPath.lineTo(passX, -passY)
+    positions.forEachIndexed { index, pos ->
+        val offset = sph2Cart(pos.azimuth, pos.elevation, radius.toDouble())
+        if (index == 0) trackPath.moveTo(offset.x, offset.y) else trackPath.lineTo(offset.x, offset.y)
     }
     return trackPath
 }
 
 private fun createTrackEffect(trackPath: Path): PathEffect {
-    val shape = Path()
     val shapeRadius = 24f
     val angle = 120.0.toRadians()
-    shape.moveTo((shapeRadius * cos(angle)).toFloat(), (shapeRadius * sin(angle)).toFloat())
-    for (i in 1 until 3) {
-        val x = (shapeRadius * cos(angle - angle * i)).toFloat()
-        val y = (shapeRadius * sin(angle - angle * i)).toFloat()
-        shape.lineTo(x, y)
+    val shape = Path().apply {
+        moveTo((shapeRadius * cos(angle)).toFloat(), (shapeRadius * sin(angle)).toFloat())
+        for (i in 1 until 3) {
+            lineTo(
+                x = (shapeRadius * cos(angle - angle * i)).toFloat(),
+                y = (shapeRadius * sin(angle - angle * i)).toFloat()
+            )
+        }
+        close()
     }
-    shape.close()
     val trackLength = PathMeasure().apply { setPath(trackPath, false) }.length
-    val advance = trackLength / 2f
-    val phase = trackLength / 4f
-    return PathEffect.stampedPathEffect(shape, advance, phase, StampedPathEffectStyle.Rotate)
+    return PathEffect.stampedPathEffect(shape, trackLength / 2f, trackLength / 4f, StampedPathEffectStyle.Rotate)
 }
 
-private fun sph2CartX(azim: Double, elev: Double, r: Double): Float {
+private fun sph2Cart(azim: Double, elev: Double, r: Double): Offset {
     val radius = r * (PI_2 - elev) / PI_2
-    return (radius * cos(PI_2 - azim)).toFloat()
-}
-
-private fun sph2CartY(azim: Double, elev: Double, r: Double): Float {
-    val radius = r * (PI_2 - elev) / PI_2
-    return (radius * sin(PI_2 - azim)).toFloat()
+    return Offset(
+        x = (radius * cos(PI_2 - azim)).toFloat(),
+        y = -(radius * sin(PI_2 - azim)).toFloat()
+    )
 }

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarViewModel.kt

@@ -26,16 +26,12 @@ import androidx.lifecycle.viewmodel.initializer
 import androidx.lifecycle.viewmodel.viewModelFactory
 import com.rtbishop.look4sat.core.domain.model.SatRadio
 import com.rtbishop.look4sat.core.domain.predict.OrbitalObject
-import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
-import com.rtbishop.look4sat.core.domain.repository.BtService
-import com.rtbishop.look4sat.core.domain.repository.ExtendedParams
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
-import com.rtbishop.look4sat.core.domain.repository.IReporterRepo
+import com.rtbishop.look4sat.core.domain.repository.IReporter
 import com.rtbishop.look4sat.core.domain.repository.ISatelliteRepo
 import com.rtbishop.look4sat.core.domain.repository.ISensorsRepo
 import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
-import com.rtbishop.look4sat.core.domain.repository.WithoutExtParams
 import com.rtbishop.look4sat.core.domain.usecase.IAddToCalendar
 import com.rtbishop.look4sat.core.domain.utility.round
 import com.rtbishop.look4sat.core.domain.utility.toDegrees
@@ -43,79 +39,75 @@ import com.rtbishop.look4sat.core.domain.utility.toTimerString
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 
 class RadarViewModel(
     private val savedStateHandle: SavedStateHandle,
-    private val bluetoothReporter: IReporterRepo<WithoutExtParams>,
-    private val networkReporter: IReporterRepo<ExtendedParams>,
+    private val bluetoothReporter: IReporter,
+    private val networkReporter: IReporter,
     private val satelliteRepo: ISatelliteRepo,
     private val settingsRepo: ISettingsRepo,
     private val sensorsRepo: ISensorsRepo,
     private val addToCalendar: IAddToCalendar
 ) : ViewModel() {
 
-    private val _uiState = MutableStateFlow(
-        RadarState(
-            currentPass = null,
-            currentTime = "00:00:00",
-            isCurrentTimeAos = true,
-            orientationValues = sensorsRepo.orientation.value,
-            orbitalPos = null,
-            satTrack = emptyList(),
-            shouldShowSweep = settingsRepo.otherSettings.value.stateOfSweep,
-            shouldUseCompass = settingsRepo.otherSettings.value.stateOfSensors,
-            selectedTransmitterUuid = null,
-            selectedFrequency = null,
-            transmitters = emptyList(),
-            sendAction = ::handleAction,
-        )
-    )
     private val stationPos = settingsRepo.stationPosition.value
     private val magDeclination = sensorsRepo.getMagDeclination(stationPos)
+    private val _uiState = MutableStateFlow(
+        RadarState(
+            isUtc = settingsRepo.otherSettings.value.stateOfUtc,
+            orientationValues = sensorsRepo.orientation.value,
+            shouldShowSweep = settingsRepo.otherSettings.value.stateOfSweep,
+            shouldUseCompass = settingsRepo.otherSettings.value.stateOfSensors
+        )
+    )
     val uiState: StateFlow<RadarState> = _uiState
 
     init {
+        // Compass sensor collection
         if (settingsRepo.otherSettings.value.stateOfSensors) {
             viewModelScope.launch {
                 sensorsRepo.enableSensor()
                 sensorsRepo.orientation.collect { data ->
-                    val orientationValues = Pair(data.first + magDeclination, data.second)
+                    val orientationValues = (data.first + magDeclination) to data.second
                     _uiState.update { it.copy(orientationValues = orientationValues) }
                 }
             }
         }
+        // React to UTC setting changes
+        viewModelScope.launch {
+            settingsRepo.otherSettings.collectLatest { settings ->
+                _uiState.update { it.copy(isUtc = settings.stateOfUtc) }
+            }
+        }
+        // Resolve which pass we're tracking and start the tick loop
         viewModelScope.launch {
             val catNum = savedStateHandle.get<Int>("catNum") ?: 0
             val aosTime = savedStateHandle.get<Long>("aosTime") ?: 0L
             val passes = satelliteRepo.passes.value
-            val pass = passes.find { pass -> pass.catNum == catNum && pass.aosTime == aosTime }
-            val currentPass = pass ?: passes.firstOrNull()
+            val currentPass = passes.find { it.catNum == catNum && it.aosTime == aosTime }
+                ?: passes.firstOrNull()
             currentPass?.let { satPass ->
                 _uiState.update { it.copy(currentPass = satPass) }
                 val transmitters = satelliteRepo.getRadiosWithId(satPass.catNum)
+                // Compute track once (it doesn't change for a given pass)
+                if (!satPass.isDeepSpace) {
+                    val track = satelliteRepo.getTrack(
+                        satPass.orbitalObject, stationPos, satPass.aosTime, satPass.losTime
+                    )
+                    _uiState.update { it.copy(satTrack = track) }
+                }
+                // Tick loop — position, timer, and radio updates every second
                 while (isActive) {
                     val timeNow = System.currentTimeMillis()
                     val pos = satelliteRepo.getPosition(satPass.orbitalObject, stationPos, timeNow)
-                    when {
-                        satPass.isDeepSpace -> {
-                            val time = 0L.toTimerString()
-                            _uiState.update { it.copy(currentTime = time, isCurrentTimeAos = false) }
-                        }
-                        satPass.aosTime > timeNow -> {
-                            val time = satPass.aosTime.minus(timeNow).toTimerString()
-                            _uiState.update { it.copy(currentTime = time, isCurrentTimeAos = true) }
-                        }
-                        else -> {
-                            val time = satPass.losTime.minus(timeNow).toTimerString()
-                            _uiState.update { it.copy(currentTime = time, isCurrentTimeAos = false) }
-                        }
-                    }
+                    val (time, isAos) = computeTimer(satPass.isDeepSpace, satPass.aosTime, satPass.losTime, timeNow)
+                    _uiState.update { it.copy(currentTime = time, isCurrentTimeAos = isAos, orbitalPos = pos) }
                     processRadios(transmitters, satPass.orbitalObject, timeNow)
-                    sendPassData(satPass, pos, satPass.orbitalObject)
-                    sendPassDataBT(pos)
+                    sendPassData(pos)
                     delay(1000)
                 }
             }
@@ -127,75 +119,65 @@ class RadarViewModel(
         super.onCleared()
     }
 
-    private fun handleAction(action: RadarAction) {
+    fun onAction(action: RadarAction) {
         when (action) {
             is RadarAction.AddToCalendar -> addToCalendar(action.name, action.aosTime, action.losTime)
-            is RadarAction.SelectTransmitter -> { _uiState.update { it.copy(selectedTransmitterUuid = action.uuid) } }
+            is RadarAction.SelectTransmitter -> _uiState.update { it.copy(selectedTransmitterUuid = action.uuid) }
         }
     }
 
-    private suspend fun sendPassData(orbitalPass: OrbitalPass, orbitalPos: OrbitalPos, orbitalObject: OrbitalObject) {
-        var track: List<OrbitalPos> = emptyList()
-        if (!orbitalPass.isDeepSpace) {
-            track = satelliteRepo.getTrack(
-                orbitalObject, stationPos, orbitalPass.aosTime, orbitalPass.losTime
-            )
-        }
-        _uiState.update { it.copy(orbitalPos = orbitalPos, satTrack = track) }
-        viewModelScope.launch {
-            if (settingsRepo.rcSettings.value.rotatorState) {
-                val server = settingsRepo.rcSettings.value.rotatorAddress
-                val port = settingsRepo.rcSettings.value.rotatorPort.toInt()
-                val format = settingsRepo.rcSettings.value.rotatorFormat
-                val azimuth = orbitalPos.azimuth.toDegrees().round(2)
-                val elevation = orbitalPos.elevation.toDegrees().round(2)
-                networkReporter.reportRotation(format, azimuth, elevation, ExtendedParams(server, port))
-            }
-            if (settingsRepo.rcSettings.value.frequencyState) {
-                _uiState.value.selectedFrequency?.let { freq ->
-                    val server = settingsRepo.rcSettings.value.frequencyAddress
-                    val port = settingsRepo.rcSettings.value.frequencyPort.toInt()
-                    val format = settingsRepo.rcSettings.value.frequencyFormat
-                    networkReporter.reportFrequency(format,freq, ExtendedParams(server, port))
-                }
-            }
+    private fun computeTimer(isDeepSpace: Boolean, aosTime: Long, losTime: Long, timeNow: Long): Pair<String, Boolean> {
+        return when {
+            isDeepSpace -> 0L.toTimerString() to false
+            aosTime > timeNow -> (aosTime - timeNow).toTimerString() to true
+            else -> (losTime - timeNow).toTimerString() to false
         }
     }
 
-    private fun sendPassDataBT(orbitalPos: OrbitalPos) {
-        viewModelScope.launch {
-            if (settingsRepo.rcSettings.value.bluetoothRotatorState) {
-                val btRotatorDevice = settingsRepo.rcSettings.value.bluetoothRotatorAddress
-                if (bluetoothReporter.isConnected(BtService.ROTATOR)) {
-                    val format = settingsRepo.rcSettings.value.bluetoothRotatorFormat
-                    val azimuth = orbitalPos.azimuth.toDegrees().round(0)
-                    val elevation = orbitalPos.elevation.toDegrees().round(0)
-                    bluetoothReporter.reportRotation(format, azimuth, elevation, WithoutExtParams(0))
-                } else if (!bluetoothReporter.isConnecting(BtService.ROTATOR)) {
-//                    Log.i("BTReporter", "BTReporter (rotator): Attempting to connect...")
-                    bluetoothReporter.connect(BtService.ROTATOR,btRotatorDevice)
-                }
-            }
-            if (settingsRepo.rcSettings.value.bluetoothFrequencyState) {
-                val btFrequencyDevice = settingsRepo.rcSettings.value.bluetoothFrequencyAddress
-                if (bluetoothReporter.isConnected(BtService.FREQUENCY)) {
-                    val format = settingsRepo.rcSettings.value.bluetoothFrequencyFormat
-                    val frequency = _uiState.value.selectedFrequency
-                    frequency?.let { freq ->
-                        bluetoothReporter.reportFrequency(format, freq, WithoutExtParams(0))
-                    }
-                } else if (!bluetoothReporter.isConnecting(BtService.FREQUENCY)) {
-//                    Log.i("BTReporter", "BTReporter (frequency): Attempting to connect...")
-                    bluetoothReporter.connect(BtService.FREQUENCY, btFrequencyDevice)
-                }
+    private fun sendPassData(orbitalPos: OrbitalPos) {
+        val rc = settingsRepo.rcSettings.value
+        sendReporterData(
+            networkReporter, orbitalPos,
+            rc.rotatorState, rc.rotatorFormat,
+            rc.frequencyState, rc.frequencyFormat
+        )
+        sendReporterData(
+            bluetoothReporter, orbitalPos,
+            rc.bluetoothRotatorState, rc.bluetoothRotatorFormat,
+            rc.bluetoothFrequencyState, rc.bluetoothFrequencyFormat
+        )
+    }
+
+    private fun sendReporterData(
+        reporter: IReporter,
+        orbitalPos: OrbitalPos,
+        rotatorEnabled: Boolean,
+        rotatorFormat: String,
+        frequencyEnabled: Boolean,
+        frequencyFormat: String
+    ) {
+        if (rotatorEnabled) {
+            val azimuth = orbitalPos.azimuth.toDegrees().round(2)
+            val elevation = orbitalPos.elevation.toDegrees().round(2)
+            reporter.reportRotation(rotatorFormat, azimuth, elevation)
+        }
+        if (frequencyEnabled) {
+            _uiState.value.selectedFrequency?.let { freq ->
+                reporter.reportFrequency(frequencyFormat, freq)
             }
         }
     }
 
     private suspend fun processRadios(radios: List<SatRadio>, orbitalObject: OrbitalObject, time: Long) {
         val transmitters = satelliteRepo.getRadios(orbitalObject, stationPos, radios, time)
+        val isFreqEnabled =
+            settingsRepo.rcSettings.value.frequencyState || settingsRepo.rcSettings.value.bluetoothFrequencyState
         _uiState.update { state ->
-            if (!settingsRepo.rcSettings.value.frequencyState && !settingsRepo.rcSettings.value.bluetoothFrequencyState) {
+            if (!isFreqEnabled) {
+                // Skip update if nothing changed
+                if (state.transmitters == transmitters && state.selectedTransmitterUuid == null && state.selectedFrequency == null) {
+                    return@update state
+                }
                 return@update state.copy(
                     transmitters = transmitters,
                     selectedTransmitterUuid = null,
@@ -208,18 +190,16 @@ class RadarViewModel(
                 val low = radio.downlinkLow
                 val high = radio.downlinkHigh
                 when {
-                    low != null && high != null ->
-                        (low + high) / 2
-                    low != null ->
-                        low
+                    low != null && high != null -> (low + high) / 2
+                    low != null -> low
                     else -> null
                 }
             }
-            state.copy(
-                transmitters = transmitters,
-                selectedTransmitterUuid = selectedUuid,
-                selectedFrequency = freq
-            )
+            // Skip update if nothing changed
+            if (state.transmitters == transmitters && state.selectedTransmitterUuid == selectedUuid && state.selectedFrequency == freq) {
+                return@update state
+            }
+            state.copy(transmitters = transmitters, selectedTransmitterUuid = selectedUuid, selectedFrequency = freq)
         }
     }
 

feature/radiocontrol/build.gradle.kts

@@ -0,0 +1,7 @@
+plugins {
+    alias(libs.plugins.convention.featurePlugin)
+}
+
+android {
+    namespace = "com.rtbishop.look4sat.feature.radiocontrol"
+}

feature/radiocontrol/src/main/AndroidManifest.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest>
+
+</manifest>

feature/radiocontrol/src/main/java/com/rtbishop/look4sat/feature/radiocontrol/RadioControlScreen.kt

@@ -0,0 +1,398 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.feature.radiocontrol
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.ExperimentalLayoutApi
+import androidx.compose.foundation.layout.FlowRow
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material3.ElevatedCard
+import androidx.compose.material3.FilterChip
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.keepScreenOn
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavGraphBuilder
+import androidx.navigation.compose.composable
+import androidx.navigation.navArgument
+import com.rtbishop.look4sat.core.domain.model.SatRadio
+import com.rtbishop.look4sat.core.presentation.CardButton
+import com.rtbishop.look4sat.core.presentation.IconCard
+import com.rtbishop.look4sat.core.presentation.NextPassRow
+import com.rtbishop.look4sat.core.presentation.R
+import com.rtbishop.look4sat.core.presentation.Screen
+import com.rtbishop.look4sat.core.presentation.TimerRow
+import com.rtbishop.look4sat.core.presentation.TopBar
+import com.rtbishop.look4sat.core.presentation.getDefaultPass
+import com.rtbishop.look4sat.core.presentation.isVerticalLayout
+import com.rtbishop.look4sat.core.presentation.layoutPadding
+import java.util.Locale
+
+fun NavGraphBuilder.radioControlDestination(navigateUp: () -> Unit) {
+    val route = "${Screen.RadioControl.route}?catNum={catNum}&aosTime={aosTime}"
+    val args = listOf(
+        navArgument("catNum") { defaultValue = 0 },
+        navArgument("aosTime") { defaultValue = 0L }
+    )
+    composable(route, args) {
+        val viewModel = viewModel(RadioControlViewModel::class.java, factory = RadioControlViewModel.Factory)
+        val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+        RadioControlScreen(uiState, viewModel::onAction, navigateUp)
+    }
+}
+
+@Composable
+private fun RadioControlScreen(
+    uiState: RadioControlState,
+    onAction: (RadioControlAction) -> Unit,
+    navigateUp: () -> Unit
+) {
+    Column(
+        modifier = Modifier
+            .layoutPadding()
+            .keepScreenOn(),
+        verticalArrangement = Arrangement.spacedBy(6.dp)
+    ) {
+        val currentPass = uiState.currentPass ?: getDefaultPass()
+        val isVertical = isVerticalLayout()
+        if (isVertical) {
+            TopBar {
+                IconCard(action = navigateUp, resId = R.drawable.ic_back)
+                TimerRow(timeString = uiState.currentTime, isTimeAos = uiState.isCurrentTimeAos)
+                IconCard(action = navigateUp, resId = R.drawable.ic_back)
+            }
+            TopBar { NextPassRow(pass = currentPass) }
+        } else {
+            TopBar {
+                IconCard(action = navigateUp, resId = R.drawable.ic_back)
+                TimerRow(timeString = uiState.currentTime, isTimeAos = uiState.isCurrentTimeAos)
+                NextPassRow(pass = currentPass, modifier = Modifier.weight(1f))
+                IconCard(action = navigateUp, resId = R.drawable.ic_back)
+            }
+        }
+
+        RadioPanel(panel = uiState.txPanel)
+        RadioPanel(panel = uiState.rxPanel)
+
+        PositionRow(
+            azimuth = uiState.azimuth,
+            elevation = uiState.elevation,
+            distance = uiState.distance
+        )
+
+        val selectedTransponder = uiState.transponders.find {
+            it.uuid == uiState.selectedTransponderUuid
+        }
+
+        LazyColumn(
+            modifier = Modifier.weight(1f),
+            verticalArrangement = Arrangement.spacedBy(4.dp)
+        ) {
+            item {
+                TransponderSelector(
+                    transponders = uiState.transponders,
+                    selectedUuid = uiState.selectedTransponderUuid,
+                    onAction = onAction
+                )
+            }
+
+            if (selectedTransponder?.uplinkMode?.uppercase() == "FM") {
+                item {
+                    CtcssSelector(
+                        ctcssTone = uiState.ctcssTone,
+                        onAction = onAction
+                    )
+                }
+            }
+
+            if (uiState.txBaseFrequencyHz != null) {
+                item {
+                    FrequencyTuner(
+                        txBaseFrequencyHz = uiState.txBaseFrequencyHz,
+                        selectedTransponder = selectedTransponder,
+                        onAction = onAction
+                    )
+                }
+            }
+
+            uiState.errorMessage?.let { msg ->
+                item {
+                    Text(
+                        text = msg,
+                        color = MaterialTheme.colorScheme.error,
+                        modifier = Modifier.padding(8.dp)
+                    )
+                }
+            }
+        }
+
+        ControlButtons(
+            isConnected = uiState.txPanel.isConnected || uiState.rxPanel.isConnected,
+            isTracking = uiState.isTracking,
+            onAction = onAction
+        )
+    }
+}
+
+@Composable
+private fun RadioPanel(panel: RadioPanelState) {
+    ElevatedCard(modifier = Modifier.fillMaxWidth()) {
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.SpaceBetween,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 12.dp, vertical = 8.dp)
+        ) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Box(
+                    modifier = Modifier
+                        .size(10.dp)
+                        .clip(CircleShape)
+                        .background(if (panel.isConnected) Color(0xFF4CAF50) else Color(0xFFE57373))
+                )
+                Spacer(modifier = Modifier.width(8.dp))
+                Text(text = panel.label, fontSize = 14.sp)
+            }
+            Text(
+                text = panel.frequencyDisplay,
+                fontSize = 24.sp,
+                fontWeight = FontWeight.Bold,
+                color = MaterialTheme.colorScheme.primary
+            )
+            Text(
+                text = panel.mode ?: "--",
+                fontSize = 16.sp,
+                fontWeight = FontWeight.Medium
+            )
+        }
+    }
+}
+
+@Composable
+private fun PositionRow(azimuth: String, elevation: String, distance: String) {
+    ElevatedCard(modifier = Modifier.fillMaxWidth()) {
+        Row(
+            horizontalArrangement = Arrangement.SpaceEvenly,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(vertical = 6.dp)
+        ) {
+            Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                Text(text = "Az", fontSize = 12.sp)
+                Text(text = "$azimuth°", fontSize = 16.sp, fontWeight = FontWeight.Medium)
+            }
+            Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                Text(text = "El", fontSize = 12.sp)
+                Text(text = "$elevation°", fontSize = 16.sp, fontWeight = FontWeight.Medium)
+            }
+            Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                Text(text = "Dist", fontSize = 12.sp)
+                Text(text = "$distance km", fontSize = 16.sp, fontWeight = FontWeight.Medium)
+            }
+        }
+    }
+}
+
+@Composable
+private fun TransponderSelector(
+    transponders: List<SatRadio>,
+    selectedUuid: String?,
+    onAction: (RadioControlAction) -> Unit
+) {
+    if (transponders.isEmpty()) {
+        ElevatedCard(modifier = Modifier.fillMaxWidth()) {
+            Text(
+                text = "No transponders with uplink+downlink available",
+                textAlign = TextAlign.Center,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(16.dp)
+            )
+        }
+        return
+    }
+    Column(verticalArrangement = Arrangement.spacedBy(2.dp)) {
+        transponders.forEach { radio ->
+            TransponderItem(
+                radio = radio,
+                isSelected = radio.uuid == selectedUuid,
+                onSelect = { onAction(RadioControlAction.SelectTransponder(radio.uuid)) }
+            )
+        }
+    }
+}
+
+@Composable
+private fun TransponderItem(radio: SatRadio, isSelected: Boolean, onSelect: () -> Unit) {
+    val invLabel = if (radio.isInverted) " INV" else ""
+    val modeLabel = "${radio.uplinkMode ?: "--"}/${radio.downlinkMode ?: "--"}$invLabel"
+    Surface(
+        color = if (isSelected) MaterialTheme.colorScheme.primaryContainer
+        else MaterialTheme.colorScheme.surface,
+        shape = MaterialTheme.shapes.small,
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable { onSelect() }
+    ) {
+        Row(
+            horizontalArrangement = Arrangement.SpaceBetween,
+            verticalAlignment = Alignment.CenterVertically,
+            modifier = Modifier.padding(horizontal = 12.dp, vertical = 8.dp)
+        ) {
+            Text(text = radio.info, modifier = Modifier.weight(1f))
+            Text(text = modeLabel, fontSize = 13.sp, fontWeight = FontWeight.Medium)
+        }
+    }
+}
+
+@OptIn(ExperimentalLayoutApi::class)
+@Composable
+private fun CtcssSelector(
+    ctcssTone: Double?,
+    onAction: (RadioControlAction) -> Unit
+) {
+    ElevatedCard(modifier = Modifier.fillMaxWidth()) {
+        Column(modifier = Modifier.padding(horizontal = 8.dp, vertical = 6.dp)) {
+            Text(text = "CTCSS Tone", color = MaterialTheme.colorScheme.primary)
+            Spacer(modifier = Modifier.height(4.dp))
+            FlowRow(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
+                FilterChip(
+                    selected = ctcssTone == null,
+                    onClick = { onAction(RadioControlAction.SetCtcssTone(null)) },
+                    label = { Text("Off") }
+                )
+                RadioControlViewModel.CTCSS_TONES.forEach { tone ->
+                    FilterChip(
+                        selected = ctcssTone == tone,
+                        onClick = { onAction(RadioControlAction.SetCtcssTone(tone)) },
+                        label = { Text(String.format(Locale.ENGLISH, "%.1f", tone)) }
+                    )
+                }
+            }
+        }
+    }
+}
+
+private val FREQ_ADJUSTMENTS =
+    listOf(-10_000L to "-10k", -1_000L to "-1k", -100L to "-100", 100L to "+100", 1_000L to "+1k", 10_000L to "+10k")
+
+@Composable
+private fun FrequencyTuner(
+    txBaseFrequencyHz: Long,
+    selectedTransponder: SatRadio?,
+    onAction: (RadioControlAction) -> Unit
+) {
+    ElevatedCard(modifier = Modifier.fillMaxWidth()) {
+        Column(
+            horizontalAlignment = Alignment.CenterHorizontally,
+            modifier = Modifier.padding(horizontal = 8.dp, vertical = 6.dp)
+        ) {
+            Text(text = "TX Base Frequency", color = MaterialTheme.colorScheme.primary)
+            if (selectedTransponder != null) {
+                val upLow = selectedTransponder.uplinkLow
+                val upHigh = selectedTransponder.uplinkHigh
+                val dnLow = selectedTransponder.downlinkLow
+                val dnHigh = selectedTransponder.downlinkHigh
+                if (upLow != null && upHigh != null && upLow != upHigh) {
+                    Text(
+                        text = "UP: ${RadioControlViewModel.formatFrequency(upLow)} - ${RadioControlViewModel.formatFrequency(upHigh)}",
+                        fontSize = 11.sp,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+                if (dnLow != null && dnHigh != null && dnLow != dnHigh) {
+                    Text(
+                        text = "DN: ${RadioControlViewModel.formatFrequency(dnLow)} - ${RadioControlViewModel.formatFrequency(dnHigh)}",
+                        fontSize = 11.sp,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+            }
+            Spacer(modifier = Modifier.height(4.dp))
+            Text(
+                text = "${RadioControlViewModel.formatFrequency(txBaseFrequencyHz)} MHz",
+                fontSize = 20.sp,
+                fontWeight = FontWeight.Bold,
+                color = MaterialTheme.colorScheme.primary
+            )
+            Spacer(modifier = Modifier.height(4.dp))
+            Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
+                FREQ_ADJUSTMENTS.forEach { (delta, label) ->
+                    CardButton(
+                        onClick = { onAction(RadioControlAction.AdjustTxFrequency(delta)) },
+                        text = label,
+                        modifier = Modifier.weight(1f)
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun ControlButtons(
+    isConnected: Boolean,
+    isTracking: Boolean,
+    onAction: (RadioControlAction) -> Unit
+) {
+    Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
+        if (!isConnected) {
+            CardButton(
+                onClick = { onAction(RadioControlAction.ConnectRadios) },
+                text = "Connect",
+                modifier = Modifier.weight(1f)
+            )
+        } else {
+            CardButton(
+                onClick = { onAction(RadioControlAction.DisconnectRadios) },
+                text = "Disconnect",
+                modifier = Modifier.weight(1f)
+            )
+        }
+        CardButton(
+            onClick = { onAction(RadioControlAction.ToggleTracking) },
+            text = if (isTracking) "Stop Tracking" else "Start Tracking",
+            modifier = Modifier.weight(1f)
+        )
+    }
+}

feature/radiocontrol/src/main/java/com/rtbishop/look4sat/feature/radiocontrol/RadioControlState.kt

@@ -0,0 +1,56 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.feature.radiocontrol
+
+import com.rtbishop.look4sat.core.domain.model.SatRadio
+import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
+
+data class RadioPanelState(
+    val label: String,
+    val isConnected: Boolean,
+    val frequencyHz: Long?,
+    val frequencyDisplay: String,
+    val mode: String?
+)
+
+data class RadioControlState(
+    val currentPass: OrbitalPass?,
+    val currentTime: String,
+    val isCurrentTimeAos: Boolean,
+    val azimuth: String,
+    val elevation: String,
+    val distance: String,
+    val txPanel: RadioPanelState,
+    val rxPanel: RadioPanelState,
+    val transponders: List<SatRadio>,
+    val selectedTransponderUuid: String?,
+    val txBaseFrequencyHz: Long?,
+    val ctcssTone: Double?,
+    val isTracking: Boolean,
+    val errorMessage: String?
+)
+
+sealed interface RadioControlAction {
+    data class SelectTransponder(val uuid: String) : RadioControlAction
+    data class SetTxFrequency(val frequencyHz: Long) : RadioControlAction
+    data class AdjustTxFrequency(val deltaHz: Long) : RadioControlAction
+    data class SetCtcssTone(val toneHz: Double?) : RadioControlAction
+    data object ToggleTracking : RadioControlAction
+    data object ConnectRadios : RadioControlAction
+    data object DisconnectRadios : RadioControlAction
+}

feature/radiocontrol/src/main/java/com/rtbishop/look4sat/feature/radiocontrol/RadioControlViewModel.kt

@@ -0,0 +1,206 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.feature.radiocontrol
+
+import androidx.lifecycle.SavedStateHandle
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.createSavedStateHandle
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import com.rtbishop.look4sat.core.domain.model.SatRadio
+import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
+import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
+import com.rtbishop.look4sat.core.domain.repository.IRadioTrackingService
+import com.rtbishop.look4sat.core.domain.repository.ISatelliteRepo
+import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
+import com.rtbishop.look4sat.core.domain.utility.toDegrees
+import com.rtbishop.look4sat.core.domain.utility.toTimerString
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
+import java.util.Locale
+
+class RadioControlViewModel(
+    savedStateHandle: SavedStateHandle,
+    private val trackingService: IRadioTrackingService,
+    private val satelliteRepo: ISatelliteRepo,
+    private val settingsRepo: ISettingsRepo
+) : ViewModel() {
+
+    private var currentPass: OrbitalPass? = null
+    private var transponders: List<SatRadio> = emptyList()
+    private val stationPos = settingsRepo.stationPosition.value
+
+    private val _uiState = MutableStateFlow(
+        RadioControlState(
+            currentPass = null,
+            currentTime = "00:00:00",
+            isCurrentTimeAos = true,
+            azimuth = "0.0",
+            elevation = "0.0",
+            distance = "0.0",
+            txPanel = RadioPanelState("TX (Uplink)", false, null, "---", null),
+            rxPanel = RadioPanelState("RX (Downlink)", false, null, "---", null),
+            transponders = emptyList(),
+            selectedTransponderUuid = null,
+            txBaseFrequencyHz = null,
+            ctcssTone = null,
+            isTracking = false,
+            errorMessage = null
+        )
+    )
+    val uiState: StateFlow<RadioControlState> = _uiState
+
+    init {
+        val catNum = savedStateHandle.get<Int>("catNum") ?: 0
+        val aosTime = savedStateHandle.get<Long>("aosTime") ?: 0L
+
+        // Resolve pass and load transponders
+        viewModelScope.launch {
+            val passes = satelliteRepo.passes.value
+            val pass = passes.find { it.catNum == catNum && it.aosTime == aosTime }
+                ?: passes.firstOrNull()
+            currentPass = pass
+            pass?.let { satPass ->
+                val allRadios = satelliteRepo.getRadiosWithId(satPass.catNum)
+                transponders = allRadios.filter { it.downlinkLow != null }
+                _uiState.update {
+                    it.copy(currentPass = satPass, transponders = transponders)
+                }
+                // If service is already tracking this pass, sync the selected transponder
+                val svcState = trackingService.state.value
+                if (svcState.isActive && svcState.currentPass?.catNum == satPass.catNum) {
+                    _uiState.update {
+                        it.copy(selectedTransponderUuid = svcState.selectedTransponder?.uuid)
+                    }
+                }
+                // Tick loop — timer and satellite position updates every second
+                while (isActive) {
+                    val timeNow = System.currentTimeMillis()
+                    val pos = satelliteRepo.getPosition(satPass.orbitalObject, stationPos, timeNow)
+                    val (timeStr, isAos) = computeTimer(satPass.isDeepSpace, satPass.aosTime, satPass.losTime, timeNow)
+                    _uiState.update { state ->
+                        state.copy(
+                            currentTime = timeStr,
+                            isCurrentTimeAos = isAos,
+                            azimuth = String.format(Locale.ENGLISH, "%.1f", pos.azimuth.toDegrees()),
+                            elevation = String.format(Locale.ENGLISH, "%.1f", pos.elevation.toDegrees()),
+                            distance = String.format(Locale.ENGLISH, "%.0f", pos.distance)
+                        )
+                    }
+                    delay(1000)
+                }
+            }
+        }
+
+        // Observe service state for radio-specific updates (panels, frequencies, tracking status)
+        viewModelScope.launch {
+            trackingService.state.collect { svc ->
+                _uiState.update { state ->
+                    state.copy(
+                        txPanel = RadioPanelState(
+                            label = "TX (Uplink)",
+                            isConnected = svc.txConnected,
+                            frequencyHz = svc.txFrequencyHz,
+                            frequencyDisplay = svc.txFrequencyHz?.let { formatFrequency(it) } ?: "---",
+                            mode = svc.txMode
+                        ),
+                        rxPanel = RadioPanelState(
+                            label = "RX (Downlink)",
+                            isConnected = svc.rxConnected,
+                            frequencyHz = svc.rxFrequencyHz,
+                            frequencyDisplay = svc.rxFrequencyHz?.let { formatFrequency(it) } ?: "---",
+                            mode = svc.rxMode
+                        ),
+                        txBaseFrequencyHz = svc.txBaseFrequencyHz,
+                        ctcssTone = svc.ctcssTone,
+                        isTracking = svc.isActive,
+                        selectedTransponderUuid = svc.selectedTransponder?.uuid,
+                        errorMessage = svc.errorMessage
+                    )
+                }
+            }
+        }
+    }
+
+    private fun computeTimer(isDeepSpace: Boolean, aosTime: Long, losTime: Long, timeNow: Long): Pair<String, Boolean> {
+        return when {
+            isDeepSpace -> 0L.toTimerString() to false
+            aosTime > timeNow -> (aosTime - timeNow).toTimerString() to true
+            else -> (losTime - timeNow).toTimerString() to false
+        }
+    }
+
+    fun onAction(action: RadioControlAction) {
+        when (action) {
+            is RadioControlAction.SelectTransponder -> {
+                val transponder = transponders.find { it.uuid == action.uuid } ?: return
+                trackingService.setTransponder(transponder)
+            }
+            is RadioControlAction.SetTxFrequency -> trackingService.setTxBaseFrequency(action.frequencyHz)
+            is RadioControlAction.AdjustTxFrequency -> trackingService.adjustTxBaseFrequency(action.deltaHz)
+            is RadioControlAction.SetCtcssTone -> trackingService.setCtcssTone(action.toneHz)
+            RadioControlAction.ToggleTracking -> {
+                val svc = trackingService.state.value
+                if (svc.isActive) {
+                    trackingService.stopTracking()
+                } else {
+                    val pass = currentPass ?: return
+                    val transponder = svc.selectedTransponder ?: return
+                    trackingService.startTracking(pass, transponder, svc.txBaseFrequencyHz)
+                }
+            }
+            RadioControlAction.ConnectRadios -> viewModelScope.launch { trackingService.connectRadios() }
+            RadioControlAction.DisconnectRadios -> viewModelScope.launch { trackingService.disconnectRadios() }
+        }
+    }
+
+    companion object {
+
+        val CTCSS_TONES = listOf(67.0, 69.3, 71.9, 74.4, 77.0, 79.7, 82.5, 85.4, 88.5, 91.5,
+            94.8, 97.4, 100.0, 103.5, 107.2, 110.9, 114.8, 118.8, 123.0, 127.3, 131.8, 136.5,
+            141.3, 146.2, 151.4, 156.7, 162.2, 167.9, 173.8, 179.9, 186.2, 192.8, 203.5, 210.7,
+            218.1, 225.7, 233.6, 241.8, 250.3)
+
+        fun formatFrequency(frequencyHz: Long): String {
+            if (frequencyHz <= 0) return "---"
+            val mhz = frequencyHz / 1_000_000
+            val khz = (frequencyHz % 1_000_000) / 1_000
+            val hz = frequencyHz % 1_000
+            return String.format(Locale.ENGLISH, "%d.%03d.%03d", mhz, khz, hz)
+        }
+
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            val applicationKey = ViewModelProvider.AndroidViewModelFactory.APPLICATION_KEY
+            initializer {
+                val container = (this[applicationKey] as IContainerProvider).getMainContainer()
+                RadioControlViewModel(
+                    createSavedStateHandle(),
+                    container.radioTrackingService,
+                    container.satelliteRepo,
+                    container.settingsRepo
+                )
+            }
+        }
+    }
+}

feature/satellites/build.gradle.kts

@@ -1,5 +1,5 @@
 plugins {
-    alias(libs.plugins.convention.composeFeaturePlugin)
+    alias(libs.plugins.convention.featurePlugin)
 }
 
 android {

feature/satellites/src/main/java/com/rtbishop/look4sat/feature/satellites/SatellitesDialog.kt

@@ -30,7 +30,7 @@ import androidx.compose.material3.Checkbox
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.mutableStateListOf
+import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -51,14 +51,14 @@ private fun MultiTypesDialogPreview() {
 }
 
 @Composable
-fun MultiTypesDialog(
+internal fun MultiTypesDialog(
     allTypes: List<String>, types: List<String>, cancel: () -> Unit, accept: (List<String>) -> Unit
 ) {
-    val selected = remember { mutableStateListOf<String>().apply { addAll(types) } }
-    val select = { type: String ->
-        if (selected.contains(type)) selected.remove(type) else selected.add(type)
+    val selected = remember { mutableStateOf(types.toSet()) }
+    val toggle = { type: String ->
+        selected.value = if (type in selected.value) selected.value - type else selected.value + type
     }
-    val onAccept = { accept(selected.toList()) }
+    val onAccept = { accept(selected.value.toList()) }
     SharedDialog(title = stringResource(R.string.sat_type_title), onCancel = cancel, onAccept = onAccept) {
         LazyVerticalGrid(
             columns = GridCells.Adaptive(240.dp),
@@ -73,7 +73,7 @@ fun MultiTypesDialog(
                     verticalAlignment = Alignment.CenterVertically,
                     modifier = Modifier
                         .background(MaterialTheme.colorScheme.surface)
-                        .clickable { select(item) }
+                        .clickable { toggle(item) }
                 ) {
                     Text(
                         text = "${index + 1}).",
@@ -89,7 +89,7 @@ fun MultiTypesDialog(
                         overflow = TextOverflow.Ellipsis
                     )
                     Checkbox(
-                        checked = selected.contains(item),
+                        checked = item in selected.value,
                         onCheckedChange = null,
                         modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp)
                     )

feature/satellites/src/main/java/com/rtbishop/look4sat/feature/satellites/SatellitesScreen.kt

@@ -24,6 +24,7 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.grid.GridCells
@@ -32,10 +33,10 @@ import androidx.compose.foundation.lazy.grid.items
 import androidx.compose.foundation.text.BasicTextField
 import androidx.compose.material3.Checkbox
 import androidx.compose.material3.ElevatedCard
+import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.mutableStateOf
@@ -77,54 +78,97 @@ fun NavGraphBuilder.satellitesDestination(navigateUp: () -> Unit) {
             modelClass = SatellitesViewModel::class.java, factory = SatellitesViewModel.Factory
         )
         val uiState = viewModel.uiState.collectAsStateWithLifecycle().value
-        SatellitesScreen(uiState, navigateUp)
+        SatellitesScreen(uiState, viewModel::onAction, navigateUp)
     }
 }
 
 @Composable
-private fun SatellitesScreen(uiState: SatellitesState, navigateUp: () -> Unit) {
-    val toggleDialog = { uiState.takeAction(SatellitesAction.ToggleTypesDialog) }
+private fun SatellitesScreen(
+    uiState: SatellitesState,
+    onAction: (SatellitesAction) -> Unit,
+    navigateUp: () -> Unit
+) {
     if (uiState.isDialogShown) {
-        MultiTypesDialog(allTypes = uiState.typesList, types = uiState.currentTypes, toggleDialog) {
-            uiState.takeAction(SatellitesAction.SelectTypes(it))
-        }
+        MultiTypesDialog(
+            allTypes = uiState.typesList,
+            types = uiState.currentTypes,
+            cancel = { onAction(SatellitesAction.ToggleTypesDialog) },
+            accept = { onAction(SatellitesAction.SelectTypes(it)) }
+        )
     }
     if (uiState.shouldSeeWarning) {
         InfoDialog(
             stringResource(R.string.sat_warning_title),
             stringResource(R.string.sat_warning_message)
         ) {
-            uiState.takeAction(SatellitesAction.DismissWarning)
+            onAction(SatellitesAction.DismissWarning)
         }
     }
-    val unselectAll = { uiState.takeAction(SatellitesAction.UnselectAll) }
-    val selectAll = { uiState.takeAction(SatellitesAction.SelectAll) }
-    val setQuery = { newQuery: String -> uiState.takeAction(SatellitesAction.SearchFor(newQuery)) }
-    val saveSelection = { uiState.takeAction(SatellitesAction.SaveSelection).also { navigateUp() } }
+
+    val saveAndNavigateUp = {
+        onAction(SatellitesAction.SaveSelection)
+        navigateUp()
+    }
     val primCardCd = stringResource(R.string.btn_accept)
-    val primCardMod = Modifier.semantics { contentDescription = primCardCd }
     val clearAllCd = stringResource(R.string.sat_clear_all)
-    val clearAllMod = Modifier.semantics { contentDescription = clearAllCd }
     val selectAllCd = stringResource(R.string.sat_select_all)
-    val selectAllMod = Modifier.semantics { contentDescription = selectAllCd }
+
     Column(modifier = Modifier.layoutPadding(), verticalArrangement = Arrangement.spacedBy(6.dp)) {
         if (isVerticalLayout()) {
             TopBar {
-                TypeCard(types = uiState.currentTypes, toggleDialog, modifier = Modifier.weight(1f))
-                PrimaryIconCard(onClick = saveSelection, resId = R.drawable.ic_done, modifier = primCardMod)
+                TypeCard(
+                    types = uiState.currentTypes,
+                    onClick = { onAction(SatellitesAction.ToggleTypesDialog) },
+                    modifier = Modifier.weight(1f)
+                )
+                PrimaryIconCard(
+                    onClick = saveAndNavigateUp,
+                    resId = R.drawable.ic_done,
+                    modifier = Modifier.semantics { contentDescription = primCardCd }
+                )
             }
             TopBar {
-                SearchBar(setQuery = { setQuery(it) }, modifier = Modifier.weight(1f))
-                IconCard(action = unselectAll, resId = R.drawable.ic_check_off, modifier = clearAllMod)
-                IconCard(action = selectAll, resId = R.drawable.ic_check_on, modifier = selectAllMod)
+                SearchBar(
+                    onQueryChange = { onAction(SatellitesAction.SearchFor(it)) },
+                    modifier = Modifier.weight(1f)
+                )
+                IconCard(
+                    action = { onAction(SatellitesAction.UnselectAll) },
+                    resId = R.drawable.ic_check_off,
+                    modifier = Modifier.semantics { contentDescription = clearAllCd }
+                )
+                IconCard(
+                    action = { onAction(SatellitesAction.SelectAll) },
+                    resId = R.drawable.ic_check_on,
+                    modifier = Modifier.semantics { contentDescription = selectAllCd }
+                )
             }
         } else {
             TopBar {
-                PrimaryIconCard(onClick = saveSelection, resId = R.drawable.ic_done, modifier = primCardMod)
-                TypeCard(types = uiState.currentTypes, toggleDialog, modifier = Modifier.weight(1f))
-                SearchBar(setQuery = { setQuery(it) }, modifier = Modifier.weight(1f))
-                IconCard(action = unselectAll, resId = R.drawable.ic_check_off, modifier = clearAllMod)
-                IconCard(action = selectAll, resId = R.drawable.ic_check_on, modifier = selectAllMod)
+                PrimaryIconCard(
+                    onClick = saveAndNavigateUp,
+                    resId = R.drawable.ic_done,
+                    modifier = Modifier.semantics { contentDescription = primCardCd }
+                )
+                TypeCard(
+                    types = uiState.currentTypes,
+                    onClick = { onAction(SatellitesAction.ToggleTypesDialog) },
+                    modifier = Modifier.weight(1f)
+                )
+                SearchBar(
+                    onQueryChange = { onAction(SatellitesAction.SearchFor(it)) },
+                    modifier = Modifier.weight(1f)
+                )
+                IconCard(
+                    action = { onAction(SatellitesAction.UnselectAll) },
+                    resId = R.drawable.ic_check_off,
+                    modifier = Modifier.semantics { contentDescription = clearAllCd }
+                )
+                IconCard(
+                    action = { onAction(SatellitesAction.SelectAll) },
+                    resId = R.drawable.ic_check_on,
+                    modifier = Modifier.semantics { contentDescription = selectAllCd }
+                )
             }
         }
         ElevatedCard(modifier = Modifier.fillMaxSize()) {
@@ -133,7 +177,7 @@ private fun SatellitesScreen(uiState: SatellitesState, navigateUp: () -> Unit) {
                 uiState.isLoading -> CardLoadingIndicator()
                 uiState.itemsList.isEmpty() -> EmptyListCard(message = emptyMessage)
                 else -> SatellitesCard(uiState.itemsList) { id, isTicked ->
-                    uiState.takeAction(SatellitesAction.SelectSingle(id, isTicked))
+                    onAction(SatellitesAction.SelectSingle(id, isTicked))
                 }
             }
         }
@@ -141,11 +185,11 @@ private fun SatellitesScreen(uiState: SatellitesState, navigateUp: () -> Unit) {
 }
 
 @Composable
-private fun SearchBar(setQuery: (String) -> Unit, modifier: Modifier = Modifier) {
+private fun SearchBar(onQueryChange: (String) -> Unit, modifier: Modifier = Modifier) {
     val currentQuery = rememberSaveable { mutableStateOf("") }
-    val setNewQuery = { newValue: String ->
+    val updateQuery = { newValue: String ->
         currentQuery.value = newValue
-        setQuery(newValue)
+        onQueryChange(newValue)
     }
     ElevatedCard(modifier = modifier.height(48.dp)) {
         Row(
@@ -156,9 +200,11 @@ private fun SearchBar(setQuery: (String) -> Unit, modifier: Modifier = Modifier)
             Icon(painter = painterResource(id = R.drawable.ic_search), contentDescription = null)
             BasicTextField(
                 value = currentQuery.value,
-                onValueChange = { setNewQuery(it) },
+                onValueChange = updateQuery,
                 singleLine = true,
-                modifier = modifier.padding(start = 12.dp),
+                modifier = Modifier
+                    .weight(1f)
+                    .padding(start = 12.dp),
                 textStyle = TextStyle(
                     fontSize = 16.sp,
                     lineHeight = 20.sp,
@@ -179,7 +225,7 @@ private fun SearchBar(setQuery: (String) -> Unit, modifier: Modifier = Modifier)
                 },
                 cursorBrush = SolidColor(MaterialTheme.colorScheme.onSurface)
             )
-            IconButton(onClick = { setNewQuery("") }) {
+            IconButton(onClick = { updateQuery("") }) {
                 val clearCd = stringResource(R.string.sat_search_clear)
                 Icon(painter = painterResource(id = R.drawable.ic_close), contentDescription = clearCd)
             }
@@ -220,39 +266,40 @@ private fun TypeCard(types: List<String>, onClick: () -> Unit, modifier: Modifie
 @Composable
 private fun SatellitePreview() {
     val satItem = SatItem(44444, "Ultra Super Mega long satellite name", true)
-    MainTheme { Satellite(item = satItem, onSelected = { _, _ -> run {} }, modifier = Modifier) }
+    MainTheme { Satellite(item = satItem, onSelected = { _, _ -> }) }
 }
 
 @Composable
-private fun Satellite(item: SatItem, onSelected: (Int, Boolean) -> Unit, modifier: Modifier) {
+private fun Satellite(
+    item: SatItem,
+    onSelected: (Int, Boolean) -> Unit,
+    modifier: Modifier = Modifier
+) {
     val passSatId = stringResource(id = R.string.pass_satId, item.catnum)
-    Surface(
-        color = MaterialTheme.colorScheme.background,
-        modifier = modifier.clickable { onSelected(item.catnum, item.isSelected) }) {
-        Surface(modifier = Modifier.padding(bottom = 1.dp)) {
-            Row(
-                verticalAlignment = Alignment.CenterVertically,
-                modifier = Modifier
-                    .background(MaterialTheme.colorScheme.surface)
-                    .padding(start = 14.dp, top = 8.dp, end = 12.dp, bottom = 8.dp)
-            ) {
-                Text(
-                    text = "$passSatId - ", color = MaterialTheme.colorScheme.primary
-                )
-                Text(
-                    text = item.name,
-                    modifier = Modifier.weight(1f),
-                    fontWeight = FontWeight.Medium,
-                    maxLines = 1,
-                    overflow = TextOverflow.Ellipsis
-                )
-                Checkbox(
-                    checked = item.isSelected,
-                    onCheckedChange = null,
-                    modifier = Modifier.padding(start = 6.dp)
-                )
-            }
+    Column(modifier = modifier.clickable { onSelected(item.catnum, item.isSelected) }) {
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            modifier = Modifier
+                .fillMaxWidth()
+                .background(MaterialTheme.colorScheme.surface)
+                .padding(start = 14.dp, top = 8.dp, end = 12.dp, bottom = 8.dp)
+        ) {
+            Text(text = "$passSatId - ", color = MaterialTheme.colorScheme.primary)
+            Text(
+                text = item.name,
+                modifier = Modifier.weight(1f),
+                fontWeight = FontWeight.Medium,
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis,
+                color = MaterialTheme.colorScheme.onSurface
+            )
+            Checkbox(
+                checked = item.isSelected,
+                onCheckedChange = null,
+                modifier = Modifier.padding(start = 6.dp)
+            )
         }
+        HorizontalDivider(thickness = 1.dp, color = MaterialTheme.colorScheme.background)
     }
 }
 
@@ -264,11 +311,11 @@ private fun SatellitesPreview() {
         SatItem(44444, "ISS", true),
         SatItem(88888, "Starlink", false)
     )
-    MainTheme { SatellitesCard(entries) { _, _ -> run {} } }
+    MainTheme { SatellitesCard(entries) { _, _ -> } }
 }
 
 @Composable
-fun SatellitesCard(items: List<SatItem>, onSelected: (Int, Boolean) -> Unit) {
+private fun SatellitesCard(items: List<SatItem>, onSelected: (Int, Boolean) -> Unit) {
     LazyVerticalGrid(columns = GridCells.Adaptive(320.dp)) {
         items(items = items, key = { item -> item.catnum }) { entry ->
             Satellite(entry, onSelected, Modifier.animateItem())

feature/satellites/src/main/java/com/rtbishop/look4sat/feature/satellites/SatellitesState.kt

@@ -20,22 +20,21 @@ package com.rtbishop.look4sat.feature.satellites
 import com.rtbishop.look4sat.core.domain.model.SatItem
 
 data class SatellitesState(
-    val isDialogShown: Boolean,
-    val isLoading: Boolean,
-    val shouldSeeWarning: Boolean,
-    val itemsList: List<SatItem>,
-    val currentTypes: List<String>,
-    val typesList: List<String>,
-    val takeAction: (SatellitesAction) -> Unit
+    val isDialogShown: Boolean = false,
+    val isLoading: Boolean = true,
+    val shouldSeeWarning: Boolean = false,
+    val itemsList: List<SatItem> = emptyList(),
+    val currentTypes: List<String> = emptyList(),
+    val typesList: List<String> = emptyList()
 )
 
-sealed class SatellitesAction {
-    data object DismissWarning : SatellitesAction()
-    data object SaveSelection : SatellitesAction()
-    data class SearchFor(val query: String) : SatellitesAction()
-    data object SelectAll : SatellitesAction()
-    data class SelectSingle(val id: Int, val isTicked: Boolean) : SatellitesAction()
-    data class SelectTypes(val types: List<String>) : SatellitesAction()
-    data object ToggleTypesDialog : SatellitesAction()
-    data object UnselectAll : SatellitesAction()
+sealed interface SatellitesAction {
+    data object DismissWarning : SatellitesAction
+    data object SaveSelection : SatellitesAction
+    data class SearchFor(val query: String) : SatellitesAction
+    data object SelectAll : SatellitesAction
+    data class SelectSingle(val id: Int, val isTicked: Boolean) : SatellitesAction
+    data class SelectTypes(val types: List<String>) : SatellitesAction
+    data object ToggleTypesDialog : SatellitesAction
+    data object UnselectAll : SatellitesAction
 }

feature/satellites/src/main/java/com/rtbishop/look4sat/feature/satellites/SatellitesViewModel.kt

@@ -25,7 +25,6 @@ import androidx.lifecycle.viewmodel.viewModelFactory
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
 import com.rtbishop.look4sat.core.domain.repository.ISelectionRepo
 import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
-import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.collectLatest
@@ -40,20 +39,16 @@ class SatellitesViewModel(
     private val defaultTypes = selectionRepo.getCurrentTypes()
     private val _uiState = MutableStateFlow(
         SatellitesState(
-            isDialogShown = false,
             isLoading = true,
             shouldSeeWarning = settingsRepo.otherSettings.value.shouldSeeWarning,
-            itemsList = emptyList(),
             currentTypes = defaultTypes,
-            typesList = selectionRepo.getTypesList(),
-            takeAction = ::handleAction
+            typesList = selectionRepo.getTypesList()
         )
     )
     val uiState: StateFlow<SatellitesState> = _uiState
 
     init {
         viewModelScope.launch {
-            delay(1000)
             selectionRepo.setQuery(String())
             selectionRepo.setTypes(defaultTypes)
             selectionRepo.getEntriesFlow().collectLatest { items ->
@@ -67,7 +62,7 @@ class SatellitesViewModel(
         }
     }
 
-    private fun handleAction(action: SatellitesAction) {
+    fun onAction(action: SatellitesAction) {
         when (action) {
             SatellitesAction.DismissWarning -> settingsRepo.setWarningDismissed()
             SatellitesAction.SaveSelection -> saveSelection()
@@ -94,12 +89,11 @@ class SatellitesViewModel(
 
     private fun selectTypes(types: List<String>) = viewModelScope.launch {
         selectionRepo.setTypes(types)
-        _uiState.value = _uiState.value.copy(currentTypes = types, isDialogShown = false)
+        _uiState.update { it.copy(currentTypes = types, isDialogShown = false) }
     }
 
     private fun toggleTypesDialog() {
-        val currentDialogState = _uiState.value.isDialogShown
-        _uiState.value = _uiState.value.copy(isDialogShown = currentDialogState.not())
+        _uiState.update { it.copy(isDialogShown = !it.isDialogShown) }
     }
 
     companion object {

feature/settings/build.gradle.kts

@@ -1,5 +1,5 @@
 plugins {
-    alias(libs.plugins.convention.composeFeaturePlugin)
+    alias(libs.plugins.convention.featurePlugin)
 }
 
 android {

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsDialog.kt

@@ -17,6 +17,9 @@
  */
 package com.rtbishop.look4sat.feature.settings
 
+import android.bluetooth.BluetoothManager
+import android.content.Context
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -28,14 +31,18 @@ import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
 import com.rtbishop.look4sat.core.domain.model.RCSettings
+import com.rtbishop.look4sat.core.domain.model.RadioControlSettings
 import com.rtbishop.look4sat.core.presentation.CardButton
 import com.rtbishop.look4sat.core.presentation.LocalSpacing
 import com.rtbishop.look4sat.core.presentation.MainTheme
@@ -214,14 +221,14 @@ fun PreviewNetworkOutputDialog() {
                 frequencyState = false,
                 frequencyAddress = "127.0.0.1",
                 frequencyPort = "4532",
-                frequencyFormat = $$"set_freq $FREQ",
+                frequencyFormat = $$"F $FREQ",
                 bluetoothRotatorState = false,
-                bluetoothRotatorFormat = $$"W$AZ $EL",
+                bluetoothRotatorFormat = $$"P $AZ $EL",
                 bluetoothRotatorName = "Default",
                 bluetoothRotatorAddress = "00:0C:BF:13:80:5D",
                 bluetoothFrequencyState = false,
                 bluetoothFrequencyAddress = "00:0C:BF:13:80:5D",
-                bluetoothFrequencyFormat = $$"FA$FREQ"
+                bluetoothFrequencyFormat = $$"F $FREQ"
             ),
             onDismiss = {},
             onSave = { _, _, _, _, _, _, _, _ -> }
@@ -240,23 +247,21 @@ fun NetworkOutputDialog(
 ) {
     val padding = LocalSpacing.current.large
     val rotatorState = rememberSaveable { mutableStateOf(initialSettings.rotatorState) }
-    val rotatorAddress = rememberSaveable { mutableStateOf(initialSettings.rotatorAddress) }
-    val rotatorPort = rememberSaveable { mutableStateOf(initialSettings.rotatorPort) }
+    val rotatorAddress = rememberSaveable {
+        mutableStateOf("${initialSettings.rotatorAddress}:${initialSettings.rotatorPort}")
+    }
     val rotatorFormat = rememberSaveable { mutableStateOf(initialSettings.rotatorFormat) }
     val frequencyState = rememberSaveable { mutableStateOf(initialSettings.frequencyState) }
-    val frequencyAddress = rememberSaveable { mutableStateOf(initialSettings.frequencyAddress) }
-    val frequencyPort = rememberSaveable { mutableStateOf(initialSettings.frequencyPort) }
+    val frequencyAddress = rememberSaveable {
+        mutableStateOf("${initialSettings.frequencyAddress}:${initialSettings.frequencyPort}")
+    }
     val frequencyFormat = rememberSaveable { mutableStateOf(initialSettings.frequencyFormat) }
     val onAccept = {
+        val (rotIp, rotPort) = splitAddress(rotatorAddress.value)
+        val (freqIp, freqPort) = splitAddress(frequencyAddress.value)
         onSave(
-            rotatorState.value,
-            rotatorAddress.value,
-            rotatorPort.value,
-            rotatorFormat.value,
-            frequencyState.value,
-            frequencyAddress.value,
-            frequencyPort.value,
-            frequencyFormat.value
+            rotatorState.value, rotIp, rotPort, rotatorFormat.value,
+            frequencyState.value, freqIp, freqPort, frequencyFormat.value
         )
         onDismiss()
     }
@@ -266,93 +271,42 @@ fun NetworkOutputDialog(
         onAccept = onAccept
     ) {
         Column(modifier = Modifier.padding(horizontal = padding)) {
-            Row(
-                horizontalArrangement = Arrangement.SpaceBetween,
-                verticalAlignment = Alignment.CenterVertically,
-                modifier = Modifier.fillMaxWidth()
-            ) {
-                Text(stringResource(R.string.prefs_net_rotator_switch))
-                Switch(
-                    checked = rotatorState.value,
-                    onCheckedChange = { rotatorState.value = it }
-                )
-            }
-            Row(
-                horizontalArrangement = Arrangement.spacedBy(6.dp),
-                modifier = Modifier.fillMaxWidth()
-            ) {
-                OutlinedTextField(
-                    value = rotatorAddress.value,
-                    onValueChange = { rotatorAddress.value = it },
-                    singleLine = true,
-                    label = { Text(stringResource(R.string.prefs_net_rotator_ip_hint)) },
-                    modifier = Modifier.weight(1.5f),
-                    enabled = rotatorState.value
-                )
-                OutlinedTextField(
-                    value = rotatorPort.value,
-                    onValueChange = { rotatorPort.value = it },
-                    singleLine = true,
-                    label = { Text(stringResource(R.string.prefs_net_rotator_port_hint)) },
-                    modifier = Modifier.weight(1f),
-                    enabled = rotatorState.value
-                )
-            }
-            Spacer(modifier = Modifier.height(6.dp))
-            OutlinedTextField(
-                value = rotatorFormat.value,
-                onValueChange = { rotatorFormat.value = it },
-                singleLine = true,
-                label = { Text(stringResource(R.string.prefs_net_rotator_format_hint)) },
-                modifier = Modifier.fillMaxWidth(),
-                enabled = rotatorState.value
+            OutputChannelSection(
+                switchLabel = stringResource(R.string.prefs_net_rotator_switch),
+                enabled = rotatorState.value,
+                onEnabledChange = { rotatorState.value = it },
+                address = rotatorAddress.value,
+                onAddressChange = { rotatorAddress.value = it },
+                addressLabel = stringResource(R.string.prefs_net_rotator_address_hint),
+                format = rotatorFormat.value,
+                onFormatChange = { rotatorFormat.value = it },
+                formatLabel = stringResource(R.string.prefs_net_rotator_format_hint)
             )
             Spacer(modifier = Modifier.height(6.dp))
-            Row(
-                horizontalArrangement = Arrangement.SpaceBetween,
-                verticalAlignment = Alignment.CenterVertically,
-                modifier = Modifier.fillMaxWidth()
-            ) {
-                Text(stringResource(R.string.prefs_net_frequency_switch))
-                Switch(
-                    checked = frequencyState.value,
-                    onCheckedChange = { frequencyState.value = it }
-                )
-            }
-            Row(
-                horizontalArrangement = Arrangement.spacedBy(6.dp),
-                modifier = Modifier.fillMaxWidth()
-            ) {
-                OutlinedTextField(
-                    value = frequencyAddress.value,
-                    onValueChange = { frequencyAddress.value = it },
-                    singleLine = true,
-                    label = { Text(stringResource(R.string.prefs_net_frequency_ip_hint)) },
-                    modifier = Modifier.weight(1.5f),
-                    enabled = frequencyState.value
-                )
-                OutlinedTextField(
-                    value = frequencyPort.value,
-                    onValueChange = { frequencyPort.value = it },
-                    singleLine = true,
-                    label = { Text(stringResource(R.string.prefs_net_frequency_port_hint)) },
-                    modifier = Modifier.weight(1f),
-                    enabled = frequencyState.value
-                )
-            }
-            Spacer(modifier = Modifier.height(6.dp))
-            OutlinedTextField(
-                value = frequencyFormat.value,
-                onValueChange = { frequencyFormat.value = it },
-                maxLines = 2,
-                label = { Text(stringResource(R.string.prefs_net_frequency_format_hint)) },
-                modifier = Modifier.fillMaxWidth(),
-                enabled = frequencyState.value
+            OutputChannelSection(
+                switchLabel = stringResource(R.string.prefs_net_frequency_switch),
+                enabled = frequencyState.value,
+                onEnabledChange = { frequencyState.value = it },
+                address = frequencyAddress.value,
+                onAddressChange = { frequencyAddress.value = it },
+                addressLabel = stringResource(R.string.prefs_net_frequency_address_hint),
+                format = frequencyFormat.value,
+                onFormatChange = { frequencyFormat.value = it },
+                formatLabel = stringResource(R.string.prefs_net_frequency_format_hint)
             )
         }
     }
 }
 
+private fun splitAddress(address: String): Pair<String, String> {
+    val lastColon = address.lastIndexOf(':')
+    return if (lastColon >= 0) {
+        address.substring(0, lastColon) to address.substring(lastColon + 1)
+    } else {
+        address to ""
+    }
+}
+
 @Preview(showBackground = true)
 @Composable
 fun PreviewBluetoothOutputDialog() {
@@ -366,14 +320,14 @@ fun PreviewBluetoothOutputDialog() {
                 frequencyState = false,
                 frequencyAddress = "127.0.0.1",
                 frequencyPort = "4532",
-                frequencyFormat = $$"set_freq $FREQ",
+                frequencyFormat = $$"F $FREQ",
                 bluetoothRotatorState = false,
-                bluetoothRotatorFormat = $$"W$AZ $EL",
+                bluetoothRotatorFormat = $$"P $AZ $EL",
                 bluetoothRotatorName = "Default",
                 bluetoothRotatorAddress = "00:0C:BF:13:80:5D",
                 bluetoothFrequencyState = false,
                 bluetoothFrequencyAddress = "00:0C:BF:13:80:5D",
-                bluetoothFrequencyFormat = $$"FA$FREQ"
+                bluetoothFrequencyFormat = $$"F $FREQ"
             ),
             onDismiss = {},
             onSave = { _, _, _, _, _, _ -> }
@@ -399,12 +353,8 @@ fun BluetoothOutputDialog(
     val frequencyFormat = rememberSaveable { mutableStateOf(initialSettings.bluetoothFrequencyFormat) }
     val onAccept = {
         onSave(
-            rotatorState.value,
-            rotatorAddress.value,
-            rotatorFormat.value,
-            frequencyState.value,
-            frequencyAddress.value,
-            frequencyFormat.value
+            rotatorState.value, rotatorAddress.value, rotatorFormat.value,
+            frequencyState.value, frequencyAddress.value, frequencyFormat.value
         )
         onDismiss()
     }
@@ -412,6 +362,127 @@ fun BluetoothOutputDialog(
         title = stringResource(R.string.prefs_bt_title),
         onCancel = onDismiss,
         onAccept = onAccept
+    ) {
+        Column(modifier = Modifier.padding(horizontal = padding)) {
+            OutputChannelSection(
+                switchLabel = stringResource(R.string.prefs_bt_rotator_switch),
+                enabled = rotatorState.value,
+                onEnabledChange = { rotatorState.value = it },
+                address = rotatorAddress.value,
+                onAddressChange = { rotatorAddress.value = it },
+                addressLabel = stringResource(R.string.prefs_bt_rotator_device_hint),
+                format = rotatorFormat.value,
+                onFormatChange = { rotatorFormat.value = it },
+                formatLabel = stringResource(R.string.prefs_bt_rotator_output_hint)
+            )
+            Spacer(modifier = Modifier.height(6.dp))
+            OutputChannelSection(
+                switchLabel = stringResource(R.string.prefs_bt_frequency_switch),
+                enabled = frequencyState.value,
+                onEnabledChange = { frequencyState.value = it },
+                address = frequencyAddress.value,
+                onAddressChange = { frequencyAddress.value = it },
+                addressLabel = stringResource(R.string.prefs_bt_frequency_device_hint),
+                format = frequencyFormat.value,
+                onFormatChange = { frequencyFormat.value = it },
+                formatLabel = stringResource(R.string.prefs_bt_frequency_output_hint)
+            )
+        }
+    }
+}
+
+/**
+ * Reusable section for a switch-toggled output channel with address and format fields.
+ * Used by both Network and Bluetooth output dialogs.
+ */
+@Composable
+private fun OutputChannelSection(
+    switchLabel: String,
+    enabled: Boolean,
+    onEnabledChange: (Boolean) -> Unit,
+    address: String,
+    onAddressChange: (String) -> Unit,
+    addressLabel: String,
+    format: String,
+    onFormatChange: (String) -> Unit,
+    formatLabel: String
+) {
+    Row(
+        horizontalArrangement = Arrangement.SpaceBetween,
+        verticalAlignment = Alignment.CenterVertically,
+        modifier = Modifier.fillMaxWidth()
+    ) {
+        Text(switchLabel)
+        Switch(checked = enabled, onCheckedChange = onEnabledChange)
+    }
+    Row(
+        horizontalArrangement = Arrangement.spacedBy(6.dp),
+        modifier = Modifier.fillMaxWidth()
+    ) {
+        OutlinedTextField(
+            value = address,
+            onValueChange = onAddressChange,
+            singleLine = true,
+            label = { Text(addressLabel) },
+            modifier = Modifier.weight(0.6f),
+            enabled = enabled
+        )
+        OutlinedTextField(
+            value = format,
+            onValueChange = onFormatChange,
+            singleLine = true,
+            label = { Text(formatLabel) },
+            modifier = Modifier.weight(0.4f),
+            enabled = enabled
+        )
+    }
+}
+
+@Composable
+fun RadioControlDialog(
+    initialSettings: RadioControlSettings,
+    onDismiss: () -> Unit,
+    onSave: (RadioControlSettings) -> Unit
+) {
+    val context = androidx.compose.ui.platform.LocalContext.current
+    val padding = LocalSpacing.current.large
+    val baudRates = listOf(4800, 9600, 38400)
+    val enabled = rememberSaveable { mutableStateOf(initialSettings.enabled) }
+    val radioModel = rememberSaveable { mutableStateOf(initialSettings.radioModel) }
+    val txAddress = rememberSaveable { mutableStateOf(initialSettings.txRadioAddress) }
+    val rxAddress = rememberSaveable { mutableStateOf(initialSettings.rxRadioAddress) }
+    val txName = rememberSaveable { mutableStateOf(initialSettings.txRadioName) }
+    val rxName = rememberSaveable { mutableStateOf(initialSettings.rxRadioName) }
+    val baudRate = rememberSaveable { mutableIntStateOf(initialSettings.baudRate) }
+    val selectingFor = rememberSaveable { mutableStateOf("") } // "tx", "rx", or ""
+
+    val pairedDevices = remember {
+        try {
+            val manager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
+            manager.adapter?.bondedDevices?.map { Pair(it.name ?: "Unknown", it.address) } ?: emptyList()
+        } catch (_: SecurityException) {
+            emptyList()
+        }
+    }
+
+    val onAccept = {
+        onSave(
+            RadioControlSettings(
+                enabled = enabled.value,
+                radioModel = radioModel.value,
+                txRadioAddress = txAddress.value,
+                rxRadioAddress = rxAddress.value,
+                txRadioName = txName.value,
+                rxRadioName = rxName.value,
+                baudRate = baudRate.intValue
+            )
+        )
+        onDismiss()
+    }
+    SharedDialog(
+        title = stringResource(R.string.rc_settings_title),
+        onCancel = onDismiss,
+        onAccept = onAccept
     ) {
         Column(modifier = Modifier.padding(horizontal = padding)) {
             Row(
@@ -419,65 +490,107 @@ fun BluetoothOutputDialog(
                 verticalAlignment = Alignment.CenterVertically,
                 modifier = Modifier.fillMaxWidth()
             ) {
-                Text(stringResource(R.string.prefs_bt_rotator_switch))
-                Switch(
-                    checked = rotatorState.value,
-                    onCheckedChange = { rotatorState.value = it }
-                )
+                Text(stringResource(R.string.rc_enable_switch))
+                Switch(checked = enabled.value, onCheckedChange = { enabled.value = it })
             }
-            Row(
-                horizontalArrangement = Arrangement.spacedBy(6.dp),
+            Spacer(modifier = Modifier.height(6.dp))
+
+            // Radio model selection
+            Text(
+                stringResource(R.string.rc_radio_model),
+                fontWeight = androidx.compose.ui.text.font.FontWeight.Medium,
+                color = androidx.compose.material3.MaterialTheme.colorScheme.primary
+            )
+            Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
+                RadioControlSettings.SUPPORTED_RADIOS.forEach { model ->
+                    androidx.compose.material3.FilterChip(
+                        selected = radioModel.value == model,
+                        onClick = { radioModel.value = model },
+                        label = { Text(model, fontSize = 12.sp) },
+                        enabled = enabled.value
+                    )
+                }
+            }
+            Spacer(modifier = Modifier.height(6.dp))
+
+            // TX Radio selection
+            Text("TX Radio (Uplink)", fontWeight = androidx.compose.ui.text.font.FontWeight.Medium)
+            if (txAddress.value.isNotBlank()) {
+                Text("${txName.value} - ${txAddress.value}", fontSize = 13.sp)
+            }
+            CardButton(
+                onClick = { selectingFor.value = "tx" },
+                text = "Select TX Device",
                 modifier = Modifier.fillMaxWidth()
-            ) {
-                OutlinedTextField(
-                    value = rotatorAddress.value,
-                    onValueChange = { rotatorAddress.value = it },
-                    singleLine = true,
-                    label = { Text(stringResource(R.string.prefs_bt_rotator_device_hint)) },
-                    modifier = Modifier.weight(1.5f),
-                    enabled = rotatorState.value
-                )
-                OutlinedTextField(
-                    value = rotatorFormat.value,
-                    onValueChange = { rotatorFormat.value = it },
-                    singleLine = true,
-                    label = { Text(stringResource(R.string.prefs_bt_rotator_output_hint)) },
-                    modifier = Modifier.weight(1f),
-                    enabled = rotatorState.value
-                )
+            )
+            Spacer(modifier = Modifier.height(6.dp))
+
+            // RX Radio selection
+            Text("RX Radio (Downlink)", fontWeight = androidx.compose.ui.text.font.FontWeight.Medium)
+            if (rxAddress.value.isNotBlank()) {
+                Text("${rxName.value} - ${rxAddress.value}", fontSize = 13.sp)
             }
+            CardButton(
+                onClick = { selectingFor.value = "rx" },
+                text = "Select RX Device",
+                modifier = Modifier.fillMaxWidth()
+            )
+
+            // Paired devices list (shown when selecting)
+            if (selectingFor.value.isNotBlank()) {
+                Spacer(modifier = Modifier.height(6.dp))
+                Text(
+                    text = "Paired Bluetooth Devices:",
+                    fontWeight = androidx.compose.ui.text.font.FontWeight.Medium,
+                    color = androidx.compose.material3.MaterialTheme.colorScheme.primary
+                )
+                if (pairedDevices.isEmpty()) {
+                    Text("No paired devices found. Pair your BT adapter in Android Bluetooth settings first.")
+                } else {
+                    pairedDevices.forEach { (name, address) ->
+                        androidx.compose.material3.Surface(
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .clickable {
+                                    if (selectingFor.value == "tx") {
+                                        txAddress.value = address
+                                        txName.value = name
+                                    } else {
+                                        rxAddress.value = address
+                                        rxName.value = name
+                                    }
+                                    selectingFor.value = ""
+                                }
+                                .padding(vertical = 4.dp)
+                        ) {
+                            Row(
+                                modifier = Modifier.fillMaxWidth(),
+                                horizontalArrangement = Arrangement.SpaceBetween
+                            ) {
+                                Text(name, modifier = Modifier.weight(1f))
+                                Text(address, fontSize = 12.sp)
+                            }
+                        }
+                    }
+                }
+            }
+
             Spacer(modifier = Modifier.height(6.dp))
             Row(
                 horizontalArrangement = Arrangement.SpaceBetween,
                 verticalAlignment = Alignment.CenterVertically,
                 modifier = Modifier.fillMaxWidth()
             ) {
-                Text(stringResource(R.string.prefs_bt_frequency_switch))
-                Switch(
-                    checked = frequencyState.value,
-                    onCheckedChange = { frequencyState.value = it }
-                )
-            }
-            Row(
-                horizontalArrangement = Arrangement.spacedBy(6.dp),
-                modifier = Modifier.fillMaxWidth()
-            ) {
-                OutlinedTextField(
-                    value = frequencyAddress.value,
-                    onValueChange = { frequencyAddress.value = it },
-                    singleLine = true,
-                    label = { Text(stringResource(R.string.prefs_bt_frequency_device_hint)) },
-                    modifier = Modifier.weight(1.5f),
-                    enabled = frequencyState.value
-                )
-                OutlinedTextField(
-                    value = frequencyFormat.value,
-                    onValueChange = { frequencyFormat.value = it },
-                    singleLine = true,
-                    label = { Text(stringResource(R.string.prefs_bt_frequency_output_hint)) },
-                    modifier = Modifier.weight(1f),
-                    enabled = frequencyState.value
-                )
+                Text("Baud Rate:")
+                Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
+                    baudRates.forEach { rate ->
+                        CardButton(
+                            onClick = { baudRate.intValue = rate },
+                            text = if (rate == baudRate.intValue) "[$rate]" else rate.toString(),
+                            modifier = Modifier
+                        )
+                    }
+                }
             }
         }
     }

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsScreen.kt

@@ -42,8 +42,12 @@ import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.Stable
+import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
@@ -80,178 +84,101 @@ fun NavGraphBuilder.settingsDestination() {
             modelClass = SettingsViewModel::class.java,
             factory = SettingsViewModel.Factory
         )
-        val uiState = viewModel.uiState.collectAsStateWithLifecycle().value
-        SettingsScreen(uiState)
+        val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+        SettingsScreen(uiState, viewModel::onAction)
     }
 }
 
 @Composable
-private fun SettingsScreen(uiState: SettingsState) {
-    val locationContract = ActivityResultContracts.RequestMultiplePermissions()
-    val locationError = stringResource(R.string.prefs_loc_gps_error)
-    val locationPermCoarse = Manifest.permission.ACCESS_COARSE_LOCATION
-    val locationPermFine = Manifest.permission.ACCESS_FINE_LOCATION
-    val locationRequest = rememberLauncherForActivityResult(locationContract) { permissions ->
-        when {
-            permissions[locationPermFine] == true -> uiState.sendAction(SettingsAction.SetGpsPosition)
-            permissions[locationPermCoarse] == true -> uiState.sendAction(SettingsAction.SetGpsPosition)
-            else -> uiState.sendSystemAction(SystemAction.ShowToast(locationError))
-        }
-    }
-    val contentContract = ActivityResultContracts.GetContent()
-    val contentRequestForTle = rememberLauncherForActivityResult(contentContract) { uri ->
-        uri?.let { uiState.sendAction(SettingsAction.UpdateTLEFromFile(uri.toString())) }
-    }
-    val contentRequestForTransceivers = rememberLauncherForActivityResult(contentContract) { uri ->
-        uri?.let { uiState.sendAction(SettingsAction.UpdateTransceiversFromFile(uri.toString())) }
-    }
+private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) -> Unit) {
+    val dialogs = rememberDialogVisibility()
+    val permissions = rememberSettingsPermissions(
+        sendAction = onAction,
+        onBluetoothGranted = { dialogs.bluetooth = true }
+    )
 
-    // Position settings
-    val posSettings = uiState.positionSettings
-    val setGpsPos = { locationRequest.launch(arrayOf(locationPermCoarse, locationPermFine)) }
-    val setGeoPos = { lat: Double, lon: Double ->
-        uiState.sendAction(SettingsAction.SetGeoPosition(lat, lon))
+    // Dialogs
+    if (dialogs.position) {
+        PositionDialog(
+            uiState.positionSettings.stationPos.latitude,
+            uiState.positionSettings.stationPos.longitude,
+            dismiss = { dialogs.position = false },
+            save = { lat, lon -> onAction(SettingsAction.SetGeoPosition(lat, lon)) }
+        )
     }
-    val setQthPos = { locator: String ->
-        uiState.sendAction(SettingsAction.SetQthPosition(locator))
+    if (dialogs.locator) {
+        LocatorDialog(
+            uiState.positionSettings.stationPos.qthLocator,
+            dismiss = { dialogs.locator = false },
+            save = { onAction(SettingsAction.SetQthPosition(it)) }
+        )
     }
-    val dismissPos = { uiState.sendAction(SettingsAction.DismissPosMessages) }
-    val posDialogState = rememberSaveable { mutableStateOf(false) }
-    val showPosDialog = { posDialogState.value = posDialogState.value.not() }
-    if (posDialogState.value) {
-        PositionDialog(posSettings.stationPos.latitude, posSettings.stationPos.longitude, showPosDialog, setGeoPos)
-    }
-    val locDialogState = rememberSaveable { mutableStateOf(false) }
-    val showLocDialog = { locDialogState.value = locDialogState.value.not() }
-    if (locDialogState.value) {
-        LocatorDialog(posSettings.stationPos.qthLocator, showLocDialog, setQthPos)
-    }
-
-    // Data sources dialog
-    val dataSourcesDialogState = rememberSaveable { mutableStateOf(false) }
-    val showDataSourcesDialog = { dataSourcesDialogState.value = true }
-    val dismissDataSourcesDialog = { dataSourcesDialogState.value = false }
-    if (dataSourcesDialogState.value) {
+    if (dialogs.dataSources) {
         DataSourcesDialog(
             useCustomTle = uiState.dataSourcesSettings.useCustomTLE,
             useCustomTransceivers = uiState.dataSourcesSettings.useCustomTransceivers,
             tleUrl = uiState.dataSourcesSettings.tleUrl,
             transceiversUrl = uiState.dataSourcesSettings.transceiversUrl,
-            onImportTle = { contentRequestForTle.launch("*/*") },
-            onImportTransceivers = { contentRequestForTransceivers.launch("*/*") },
-            onDismiss = dismissDataSourcesDialog,
-            onSave = {
-                useCustomTle, useCustomTransceivers, tleUrl, transceiversUrl  ->
-                if (!useCustomTle || tleUrl.isNotBlank()) {
-                    uiState.sendDataSourcesAction(DataSourcesAction.SetUseCustomTle(useCustomTle))
-                    uiState.sendDataSourcesAction(DataSourcesAction.SetTleUrl(tleUrl))
-                }
-                if (!useCustomTransceivers || transceiversUrl.isNotBlank()) {
-                    uiState.sendDataSourcesAction(DataSourcesAction.SetUseCustomTransceivers(useCustomTransceivers))
-                    uiState.sendDataSourcesAction(DataSourcesAction.SetTransceiversUrl(transceiversUrl))
-                }
-                if (useCustomTle || useCustomTransceivers) {
-                    uiState.sendAction(SettingsAction.UpdateFromWeb)
-                }
+            onImportTle = { permissions.launchTleImport(); dialogs.dataSources = false },
+            onImportTransceivers = { permissions.launchTransceiverImport(); dialogs.dataSources = false },
+            onDismiss = { dialogs.dataSources = false },
+            onSave = { useCustomTle, useCustomTransceivers, tleUrl, transceiversUrl ->
+                val current = uiState.dataSourcesSettings
+                val newSettings = current.copy(
+                    useCustomTLE = if (!useCustomTle || tleUrl.isNotBlank()) useCustomTle else current.useCustomTLE,
+                    tleUrl = if (!useCustomTle || tleUrl.isNotBlank()) tleUrl else current.tleUrl,
+                    useCustomTransceivers = if (!useCustomTransceivers || transceiversUrl.isNotBlank()) useCustomTransceivers else current.useCustomTransceivers,
+                    transceiversUrl = if (!useCustomTransceivers || transceiversUrl.isNotBlank()) transceiversUrl else current.transceiversUrl
+                )
+                if (newSettings != current) onAction(SettingsAction.UpdateDataSources(newSettings))
+                if (useCustomTle || useCustomTransceivers) onAction(SettingsAction.UpdateFromWeb)
             }
         )
     }
-
-    // Data settings
-    val dataSettings = uiState.dataSettings
-    val updateFromWeb: () -> Unit = { uiState.sendAction(SettingsAction.UpdateFromWeb) }
-    val clearAllData: () -> Unit = { uiState.sendAction(SettingsAction.ClearAllData) }
-
-    // RC settings
-    val rcSettings = uiState.rcSettings
-    val setRotatorState = { value: Boolean -> uiState.sendRCAction(RCAction.SetRotatorState(value)) }
-    val setRotatorAddress = { value: String -> uiState.sendRCAction(RCAction.SetRotatorAddress(value)) }
-    val setRotatorPort = { value: String -> uiState.sendRCAction(RCAction.SetRotatorPort(value)) }
-    val setRotatorFormat = { value: String -> uiState.sendRCAction(RCAction.SetRotatorFormat(value)) }
-    val setFrequencyState = { value: Boolean -> uiState.sendRCAction(RCAction.SetFrequencyState(value)) }
-    val setFrequencyAddress = { value: String -> uiState.sendRCAction(RCAction.SetFrequencyAddress(value)) }
-    val setFrequencyPort = { value: String -> uiState.sendRCAction(RCAction.SetFrequencyPort(value)) }
-    val setFrequencyFormat = { value: String -> uiState.sendRCAction(RCAction.SetFrequencyFormat(value)) }
-    val setBluetoothRotatorState = { value: Boolean -> uiState.sendRCAction(RCAction.SetBluetoothRotatorState(value)) }
-    val setBluetoothRotatorAddress = { value: String -> uiState.sendRCAction(RCAction.SetBluetoothRotatorAddress(value)) }
-    val setBluetoothRotatorFormat = { value: String -> uiState.sendRCAction(RCAction.SetBluetoothRotatorFormat(value)) }
-    val setBluetoothFrequencyState = { value: Boolean -> uiState.sendRCAction(RCAction.SetBluetoothFrequencyState(value)) }
-    val setBluetoothFrequencyAddress = { value: String -> uiState.sendRCAction(RCAction.SetBluetoothFrequencyAddress(value)) }
-    val setBluetoothFrequencyFormat = { value: String -> uiState.sendRCAction(RCAction.SetBluetoothFrequencyFormat(value)) }
-
-    // Network data output
-    val networkDialogState = rememberSaveable { mutableStateOf(false) }
-    val showNetworkDialog = { networkDialogState.value = true }
-    val dismissNetworkDialog = { networkDialogState.value = false }
-    if (networkDialogState.value) {
+    if (dialogs.network) {
         NetworkOutputDialog(
-            initialSettings = rcSettings,
-            onDismiss = dismissNetworkDialog,
-            onSave = { rotatorState,
-                       rotatorAddress,
-                       rotatorPort,
-                       rotatorFormat,
-                       frequencyState,
-                       frequencyAddress,
-                       frequencyPort,
-                       frequencyFormat ->
-                setRotatorState(rotatorState)
-                setRotatorAddress(rotatorAddress)
-                setRotatorPort(rotatorPort)
-                setRotatorFormat(rotatorFormat)
-                setFrequencyState(frequencyState)
-                setFrequencyAddress(frequencyAddress)
-                setFrequencyPort(frequencyPort)
-                setFrequencyFormat(frequencyFormat)
+            initialSettings = uiState.rcSettings,
+            onDismiss = { dialogs.network = false },
+            onSave = { rotState, rotAddr, rotPort, rotFmt, freqState, freqAddr, freqPort, freqFmt ->
+                onAction(
+                    SettingsAction.UpdateRC(
+                        uiState.rcSettings.copy(
+                            rotatorState = rotState, rotatorAddress = rotAddr,
+                            rotatorPort = rotPort, rotatorFormat = rotFmt,
+                            frequencyState = freqState, frequencyAddress = freqAddr,
+                            frequencyPort = freqPort, frequencyFormat = freqFmt
+                        )
+                    )
+                )
             }
         )
     }
-
-    // Bluetooth data output
-    val bluetoothDialogState = rememberSaveable { mutableStateOf(false) }
-    val bluetoothContract = ActivityResultContracts.RequestPermission()
-    val bluetoothError = stringResource(R.string.prefs_bt_perm_error)
-    val bluetoothPerm = when {
-        Build.VERSION.SDK_INT < Build.VERSION_CODES.S -> Manifest.permission.BLUETOOTH
-        else -> Manifest.permission.BLUETOOTH_CONNECT
-    }
-    val bluetoothRequest = rememberLauncherForActivityResult(bluetoothContract) { isGranted ->
-        if (!isGranted)
-        {
-            uiState.sendRCAction(RCAction.SetBluetoothRotatorState(false))
-            uiState.sendRCAction(RCAction.SetBluetoothFrequencyState(false))
-            uiState.sendSystemAction(SystemAction.ShowToast(bluetoothError))
-        }
-        else { bluetoothDialogState.value = true }
-    }
-    val showBluetoothDialog = { bluetoothRequest.launch(bluetoothPerm) }
-    val dismissBluetoothDialog = { bluetoothDialogState.value = false }
-    if (bluetoothDialogState.value) {
+    if (dialogs.bluetooth) {
         BluetoothOutputDialog(
-            initialSettings = rcSettings,
-            onDismiss = dismissBluetoothDialog,
-            onSave = { rotatorState,
-                       rotatorAddress,
-                       rotatorFormat,
-                       frequencyState,
-                       frequencyAddress,
-                       frequencyFormat ->
-                setBluetoothRotatorState(rotatorState)
-                setBluetoothRotatorAddress(rotatorAddress)
-                setBluetoothRotatorFormat(rotatorFormat)
-                setBluetoothFrequencyState(frequencyState)
-                setBluetoothFrequencyAddress(frequencyAddress)
-                setBluetoothFrequencyFormat(frequencyFormat)
+            initialSettings = uiState.rcSettings,
+            onDismiss = { dialogs.bluetooth = false },
+            onSave = { rotState, rotAddr, rotFmt, freqState, freqAddr, freqFmt ->
+                onAction(
+                    SettingsAction.UpdateRC(
+                        uiState.rcSettings.copy(
+                            bluetoothRotatorState = rotState, bluetoothRotatorAddress = rotAddr,
+                            bluetoothRotatorFormat = rotFmt, bluetoothFrequencyState = freqState,
+                            bluetoothFrequencyAddress = freqAddr, bluetoothFrequencyFormat = freqFmt
+                        )
+                    )
+                )
             }
         )
     }
+    if (dialogs.radioControl) {
+        RadioControlDialog(
+            initialSettings = uiState.radioControlSettings,
+            onDismiss = { dialogs.radioControl = false },
+            onSave = { onAction(SettingsAction.UpdateRadioControl(it)) }
+        )
+    }
 
-    // Other settings
-    val otherSettings = uiState.otherSettings
-    val toggleUtc = { value: Boolean -> uiState.sendAction(SettingsAction.ToggleUtc(value)) }
-    val toggleUpdate = { value: Boolean -> uiState.sendAction(SettingsAction.ToggleUpdate(value)) }
-    val toggleSweep = { value: Boolean -> uiState.sendAction(SettingsAction.ToggleSweep(value)) }
-    val toggleSensor = { value: Boolean -> uiState.sendAction(SettingsAction.ToggleSensor(value)) }
+    // URLs for top bar
     val uriHandler = LocalUriHandler.current
     val appUrl = stringResource(R.string.prefs_app_url)
     val donateUrl = stringResource(R.string.prefs_donate_url)
@@ -299,11 +226,31 @@ private fun SettingsScreen(uiState: SettingsState) {
             modifier = Modifier.clip(MaterialTheme.shapes.medium)
         ) {
             item {
-                LocationCard(posSettings, setGpsPos, showPosDialog, showLocDialog, dismissPos, uiState.sendSystemAction)
+                LocationCard(
+                    settings = uiState.positionSettings,
+                    setGpsPos = permissions.launchLocation,
+                    showPosDialog = { dialogs.position = true },
+                    showLocDialog = { dialogs.locator = true },
+                    dismissPosMessage = { onAction(SettingsAction.DismissPosMessages) },
+                    onAction = onAction
+                )
             }
-            item { DataCard(dataSettings, updateFromWeb, clearAllData, showDataSourcesDialog) }
-            item(span = { GridItemSpan(maxLineSpan) }) { OutputCard({ showNetworkDialog() }, { showBluetoothDialog() }) }
-            item { OtherCard(otherSettings, toggleUtc, toggleUpdate, toggleSweep, toggleSensor) }
+            item {
+                DataCard(
+                    settings = uiState.dataSettings,
+                    updateFromWeb = { onAction(SettingsAction.UpdateFromWeb) },
+                    clearAllData = { onAction(SettingsAction.ClearAllData) },
+                    showDataSourcesDialog = { dialogs.dataSources = true }
+                )
+            }
+            item(span = { GridItemSpan(maxLineSpan) }) {
+                OutputCard(
+                    onNetworkClick = { dialogs.network = true },
+                    onBluetoothClick = permissions.launchBluetooth,
+                    onRadioControlClick = { dialogs.radioControl = true }
+                )
+            }
+            item { OtherCard(uiState.otherSettings, onAction) }
             item { CardCredits() }
         }
     }
@@ -324,7 +271,7 @@ private fun LocationCard(
     showPosDialog: () -> Unit,
     showLocDialog: () -> Unit,
     dismissPosMessage: () -> Unit,
-    sendSystemAction: (SystemAction) -> Unit
+    onAction: (SettingsAction) -> Unit
 ) {
     ElevatedCard(modifier = Modifier.fillMaxWidth()) {
         Column(
@@ -339,7 +286,7 @@ private fun LocationCard(
                 UpdateIndicator(isUpdating = settings.isUpdating, Modifier.weight(1f))
             }
             Spacer(modifier = Modifier.height(2.dp))
-            Text(text = setUpdateTime(updateTime = settings.stationPos.timestamp))
+            Text(text = formatUpdateTime(updateTime = settings.stationPos.timestamp))
             Spacer(modifier = Modifier.height(2.dp))
             Row(horizontalArrangement = Arrangement.SpaceBetween, modifier = Modifier.fillMaxWidth()) {
                 Text(text = "Lat: ${settings.stationPos.latitude}°")
@@ -371,7 +318,7 @@ private fun LocationCard(
     if (settings.messageResId != 0) {
         val errorString = stringResource(id = settings.messageResId)
         LaunchedEffect(key1 = settings.messageResId) {
-            sendSystemAction(SystemAction.ShowToast(errorString))
+            onAction(SettingsAction.ShowToast(errorString))
             dismissPosMessage()
         }
     }
@@ -404,7 +351,7 @@ private fun DataCard(
                 UpdateIndicator(isUpdating = settings.isUpdating, Modifier.weight(1f))
             }
             Spacer(modifier = Modifier.height(2.dp))
-            Text(text = setUpdateTime(updateTime = settings.timestamp))
+            Text(text = formatUpdateTime(updateTime = settings.timestamp))
             Spacer(modifier = Modifier.height(2.dp))
             Row(horizontalArrangement = Arrangement.SpaceBetween, modifier = Modifier.fillMaxWidth()) {
                 Text(text = stringResource(R.string.prefs_data_entries, settings.entriesTotal))
@@ -434,12 +381,13 @@ private fun DataCard(
 
 @Preview(showBackground = true)
 @Composable
-private fun OutputCardPreview() = MainTheme { OutputCard({}, {}) }
+private fun OutputCardPreview() = MainTheme { OutputCard({}, {}, {}) }
 
 @Composable
 private fun OutputCard(
     onNetworkClick: () -> Unit,
-    onBluetoothClick: () -> Unit
+    onBluetoothClick: () -> Unit,
+    onRadioControlClick: () -> Unit
 ) {
     ElevatedCard(modifier = Modifier.fillMaxWidth()) {
         Column(modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp)) {
@@ -459,6 +407,11 @@ private fun OutputCard(
                     text = stringResource(id = R.string.prefs_bt_output),
                     modifier = Modifier.weight(1f)
                 )
+                CardButton(
+                    onClick = onRadioControlClick,
+                    text = stringResource(id = R.string.prefs_cat_output),
+                    modifier = Modifier.weight(1f)
+                )
             }
         }
     }
@@ -476,17 +429,11 @@ private fun OtherCardPreview() = MainTheme {
         shouldSeeWarning = false,
         shouldSeeWhatsNew = false
     )
-    OtherCard(settings = values, {}, {}, {}, {})
+    OtherCard(settings = values) {}
 }
 
 @Composable
-private fun OtherCard(
-    settings: OtherSettings,
-    toggleUtc: (Boolean) -> Unit,
-    toggleUpdate: (Boolean) -> Unit,
-    toggleSweep: (Boolean) -> Unit,
-    toggleSensor: (Boolean) -> Unit
-) {
+private fun OtherCard(settings: OtherSettings, onAction: (SettingsAction) -> Unit) {
     ElevatedCard(
         modifier = Modifier
             .fillMaxWidth()
@@ -497,49 +444,44 @@ private fun OtherCard(
                 text = stringResource(id = R.string.prefs_other_title),
                 color = MaterialTheme.colorScheme.primary
             )
-            Row(
-                horizontalArrangement = Arrangement.SpaceBetween,
-                verticalAlignment = Alignment.CenterVertically,
-                modifier = Modifier.fillMaxWidth()
-            ) {
-                Text(text = stringResource(id = R.string.prefs_other_switch_utc))
-                Switch(checked = settings.stateOfUtc, onCheckedChange = { toggleUtc(it) })
+            SwitchRow(R.string.prefs_other_switch_utc, settings.stateOfUtc) {
+                onAction(SettingsAction.ToggleUtc(it))
             }
-            Row(
-                horizontalArrangement = Arrangement.SpaceBetween,
-                verticalAlignment = Alignment.CenterVertically,
-                modifier = Modifier.fillMaxWidth()
-            ) {
-                Text(text = stringResource(id = R.string.prefs_other_switch_update))
-                Switch(checked = settings.stateOfAutoUpdate, onCheckedChange = { toggleUpdate(it) })
+            SwitchRow(R.string.prefs_other_switch_update, settings.stateOfAutoUpdate) {
+                onAction(SettingsAction.ToggleUpdate(it))
             }
-            Row(
-                horizontalArrangement = Arrangement.SpaceBetween,
-                verticalAlignment = Alignment.CenterVertically,
-                modifier = Modifier.fillMaxWidth()
-            ) {
-                Text(text = stringResource(id = R.string.prefs_other_switch_sweep))
-                Switch(checked = settings.stateOfSweep, onCheckedChange = { toggleSweep(it) })
+            SwitchRow(R.string.prefs_other_switch_sweep, settings.stateOfSweep) {
+                onAction(SettingsAction.ToggleSweep(it))
             }
-            Row(
-                horizontalArrangement = Arrangement.SpaceBetween,
-                verticalAlignment = Alignment.CenterVertically,
-                modifier = Modifier.fillMaxWidth()
-            ) {
-                Text(text = stringResource(id = R.string.prefs_other_switch_sensors))
-                Switch(checked = settings.stateOfSensors, onCheckedChange = { toggleSensor(it) })
+            SwitchRow(R.string.prefs_other_switch_sensors, settings.stateOfSensors) {
+                onAction(SettingsAction.ToggleSensor(it))
             }
         }
     }
 }
 
 @Composable
-private fun setUpdateTime(updateTime: Long): String {
-    val updateDate = if (updateTime != 0L) {
-        val timePattern = stringResource(id = R.string.prefs_updated_time)
-        SimpleDateFormat(timePattern, Locale.getDefault()).format(Date(updateTime))
-    } else {
-        stringResource(id = R.string.pass_time_placeholder)
+private fun SwitchRow(labelResId: Int, checked: Boolean, onCheckedChange: (Boolean) -> Unit) {
+    Row(
+        horizontalArrangement = Arrangement.SpaceBetween,
+        verticalAlignment = Alignment.CenterVertically,
+        modifier = Modifier.fillMaxWidth()
+    ) {
+        Text(text = stringResource(id = labelResId))
+        Switch(checked = checked, onCheckedChange = onCheckedChange)
+    }
+}
+
+@Composable
+private fun formatUpdateTime(updateTime: Long): String {
+    val timePattern = stringResource(id = R.string.prefs_updated_time)
+    val placeholder = stringResource(id = R.string.pass_time_placeholder)
+    val updateDate = remember(updateTime) {
+        if (updateTime != 0L) {
+            SimpleDateFormat(timePattern, Locale.getDefault()).format(Date(updateTime))
+        } else {
+            placeholder
+        }
     }
     return stringResource(id = R.string.prefs_updated_title, updateDate)
 }
@@ -638,3 +580,91 @@ private fun BotCard(onClick: () -> Unit, resId: Int, text: String, modifier: Mod
         }
     }
 }
+
+// region Dialog visibility state holder
+
+@Stable
+private class DialogVisibility {
+    var position by mutableStateOf(false)
+    var locator by mutableStateOf(false)
+    var dataSources by mutableStateOf(false)
+    var network by mutableStateOf(false)
+    var bluetooth by mutableStateOf(false)
+    var radioControl by mutableStateOf(false)
+}
+
+@Composable
+private fun rememberDialogVisibility(): DialogVisibility {
+    return rememberSaveable(saver = run {
+        androidx.compose.runtime.saveable.Saver(
+            save = {
+                listOf(it.position, it.locator, it.dataSources, it.network, it.bluetooth, it.radioControl)
+            },
+            restore = {
+                DialogVisibility().apply {
+                    position = it[0]; locator = it[1]; dataSources = it[2]
+                    network = it[3]; bluetooth = it[4]; radioControl = it[5]
+                }
+            }
+        )
+    }) { DialogVisibility() }
+}
+
+// endregion
+
+// region Permission launchers holder
+
+@Stable
+private class SettingsPermissions(
+    val launchLocation: () -> Unit,
+    val launchTleImport: () -> Unit,
+    val launchTransceiverImport: () -> Unit,
+    val launchBluetooth: () -> Unit
+)
+
+@Composable
+private fun rememberSettingsPermissions(
+    sendAction: (SettingsAction) -> Unit,
+    onBluetoothGranted: () -> Unit
+): SettingsPermissions {
+    val locationError = stringResource(R.string.prefs_loc_gps_error)
+    val locationRequest = rememberLauncherForActivityResult(
+        ActivityResultContracts.RequestMultiplePermissions()
+    ) { permissions ->
+        val fine = permissions[Manifest.permission.ACCESS_FINE_LOCATION] == true
+        val coarse = permissions[Manifest.permission.ACCESS_COARSE_LOCATION] == true
+        if (fine || coarse) sendAction(SettingsAction.SetGpsPosition)
+        else sendAction(SettingsAction.ShowToast(locationError))
+    }
+
+    val tleRequest = rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) { uri ->
+        uri?.let { sendAction(SettingsAction.UpdateTLEFromFile(it.toString())) }
+    }
+
+    val transceiversRequest = rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) { uri ->
+        uri?.let { sendAction(SettingsAction.UpdateTransceiversFromFile(it.toString())) }
+    }
+
+    val bluetoothError = stringResource(R.string.prefs_bt_perm_error)
+    val bluetoothPerm = if (Build.VERSION.SDK_INT < Build.VERSION_CODES.S)
+        Manifest.permission.BLUETOOTH else Manifest.permission.BLUETOOTH_CONNECT
+    val bluetoothRequest = rememberLauncherForActivityResult(ActivityResultContracts.RequestPermission()) { granted ->
+        if (granted) onBluetoothGranted()
+        else sendAction(SettingsAction.ShowToast(bluetoothError))
+    }
+
+    return remember {
+        SettingsPermissions(
+            launchLocation = {
+                locationRequest.launch(
+                    arrayOf(Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION)
+                )
+            },
+            launchTleImport = { tleRequest.launch("*/*") },
+            launchTransceiverImport = { transceiversRequest.launch("*/*") },
+            launchBluetooth = { bluetoothRequest.launch(bluetoothPerm) }
+        )
+    }
+}
+
+// endregion

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsState.kt

@@ -20,8 +20,8 @@ package com.rtbishop.look4sat.feature.settings
 import com.rtbishop.look4sat.core.domain.model.DataSourcesSettings
 import com.rtbishop.look4sat.core.domain.model.OtherSettings
 import com.rtbishop.look4sat.core.domain.model.RCSettings
+import com.rtbishop.look4sat.core.domain.model.RadioControlSettings
 import com.rtbishop.look4sat.core.domain.predict.GeoPos
-import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
 
 data class PositionSettings(
     val isUpdating: Boolean, val stationPos: GeoPos, val messageResId: Int
@@ -32,62 +32,42 @@ data class DataSettings(
 )
 
 data class SettingsState(
-    val nextPass: OrbitalPass,
-    val nextTime: String,
-    val isNextTimeAos: Boolean,
     val appVersionName: String,
     val positionSettings: PositionSettings,
     val dataSettings: DataSettings,
     val otherSettings: OtherSettings,
     val rcSettings: RCSettings,
-    val dataSourcesSettings: DataSourcesSettings,
-    val sendAction: (SettingsAction) -> Unit,
-    val sendRCAction: (RCAction) -> Unit,
-    val sendSystemAction: (SystemAction) -> Unit,
-    val sendDataSourcesAction: (DataSourcesAction) -> Unit
+    val radioControlSettings: RadioControlSettings,
+    val dataSourcesSettings: DataSourcesSettings
 )
 
-sealed class SettingsAction {
-    data object SetGpsPosition : SettingsAction()
-    data class SetGeoPosition(val latitude: Double, val longitude: Double) : SettingsAction()
-    data class SetQthPosition(val locator: String) : SettingsAction()
-    data object DismissPosMessages : SettingsAction()
-    data object UpdateFromWeb : SettingsAction()
-    data class UpdateTLEFromFile(val uri: String) : SettingsAction()
-    data class UpdateTransceiversFromFile(val uri: String) : SettingsAction()
-    data object ClearAllData : SettingsAction()
-    data class ToggleUtc(val value: Boolean) : SettingsAction()
-    data class ToggleUpdate(val value: Boolean) : SettingsAction()
-    data class ToggleSweep(val value: Boolean) : SettingsAction()
-    data class ToggleSensor(val value: Boolean) : SettingsAction()
-    data class ToggleLightTheme(val value: Boolean) : SettingsAction()
-}
+sealed interface SettingsAction {
+    // Position
+    data object SetGpsPosition : SettingsAction
+    data class SetGeoPosition(val latitude: Double, val longitude: Double) : SettingsAction
+    data class SetQthPosition(val locator: String) : SettingsAction
+    data object DismissPosMessages : SettingsAction
 
-sealed class SystemAction {
-    data class ShowToast(val message: String) : SystemAction()
-}
+    // Data
+    data object UpdateFromWeb : SettingsAction
+    data class UpdateTLEFromFile(val uri: String) : SettingsAction
+    data class UpdateTransceiversFromFile(val uri: String) : SettingsAction
+    data object ClearAllData : SettingsAction
 
-sealed class RCAction {
-    data class SetRotatorState(val value: Boolean) : RCAction()
-    data class SetRotatorAddress(val value: String) : RCAction()
-    data class SetRotatorPort(val value: String) : RCAction()
-    data class SetRotatorFormat(val value: String) : RCAction()
-    data class SetFrequencyState(val value: Boolean) : RCAction()
-    data class SetFrequencyAddress(val value: String) : RCAction()
-    data class SetFrequencyPort(val value: String) : RCAction()
-    data class SetFrequencyFormat(val value: String) : RCAction()
-    data class SetBluetoothRotatorState(val value: Boolean) : RCAction()
-    data class SetBluetoothRotatorFormat(val value: String) : RCAction()
-    data class SetBluetoothRotatorName(val value: String) : RCAction()
-    data class SetBluetoothRotatorAddress(val value: String) : RCAction()
-    data class SetBluetoothFrequencyState(val value: Boolean) : RCAction()
-    data class SetBluetoothFrequencyFormat(val value: String) : RCAction()
-    data class SetBluetoothFrequencyAddress(val value: String) : RCAction()
-}
+    // Toggles
+    data class ToggleUtc(val value: Boolean) : SettingsAction
+    data class ToggleUpdate(val value: Boolean) : SettingsAction
+    data class ToggleSweep(val value: Boolean) : SettingsAction
+    data class ToggleSensor(val value: Boolean) : SettingsAction
+    data class ToggleLightTheme(val value: Boolean) : SettingsAction
 
-sealed class DataSourcesAction {
-    data class SetUseCustomTle(val value: Boolean) : DataSourcesAction()
-    data class SetUseCustomTransceivers(val value: Boolean) : DataSourcesAction()
-    data class SetTleUrl(val value: String) : DataSourcesAction()
-    data class SetTransceiversUrl(val value: String) : DataSourcesAction()
+    // Remote control
+    data class UpdateRC(val settings: RCSettings) : SettingsAction
+    data class UpdateRadioControl(val settings: RadioControlSettings) : SettingsAction
+
+    // Data sources
+    data class UpdateDataSources(val settings: DataSourcesSettings) : SettingsAction
+
+    // System
+    data class ShowToast(val message: String) : SettingsAction
 }

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsViewModel.kt

@@ -22,93 +22,58 @@ import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
 import androidx.lifecycle.viewmodel.initializer
 import androidx.lifecycle.viewmodel.viewModelFactory
-import com.rtbishop.look4sat.core.domain.model.DataSourcesSettings
-import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
 import com.rtbishop.look4sat.core.domain.repository.IDatabaseRepo
-import com.rtbishop.look4sat.core.domain.repository.ISatelliteRepo
 import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
 import com.rtbishop.look4sat.core.domain.usecase.IShowToast
-import com.rtbishop.look4sat.core.domain.utility.toTimerString
 import com.rtbishop.look4sat.core.presentation.R
-import com.rtbishop.look4sat.core.presentation.getDefaultPass
-import kotlinx.coroutines.Job
-import kotlinx.coroutines.cancelAndJoin
-import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
-import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.update
-import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 
 class SettingsViewModel(
     private val databaseRepo: IDatabaseRepo,
-    private val satelliteRepo: ISatelliteRepo,
     private val settingsRepo: ISettingsRepo,
     private val showToast: IShowToast
 ) : ViewModel() {
 
     private val defaultPosSettings = PositionSettings(false, settingsRepo.stationPosition.value, 0)
     private val defaultDataSettings = DataSettings(false, 0, 0, 0L)
-    private val defaultDataSourcesSettings = DataSourcesSettings(
-        useCustomTLE = false,
-        useCustomTransceivers = false,
-        tleUrl = settingsRepo.dataSourcesSettings.value.tleUrl,
-        transceiversUrl = settingsRepo.dataSourcesSettings.value.transceiversUrl
-    )
     private val _uiState = MutableStateFlow(
         SettingsState(
-            nextTime = "00:00:00",
-            isNextTimeAos = true,
-            nextPass = getDefaultPass(),
             appVersionName = settingsRepo.appVersionName,
             positionSettings = defaultPosSettings,
             dataSettings = defaultDataSettings,
             otherSettings = settingsRepo.otherSettings.value,
             rcSettings = settingsRepo.rcSettings.value,
-            dataSourcesSettings = defaultDataSourcesSettings,
-            sendAction = ::handleAction,
-            sendRCAction = ::handleAction,
-            sendSystemAction = ::handleAction,
-            sendDataSourcesAction = ::handleAction
+            radioControlSettings = settingsRepo.radioControlSettings.value,
+            dataSourcesSettings = settingsRepo.dataSourcesSettings.value
         )
     )
-    private var processing: Job? = null
 
     val uiState: StateFlow<SettingsState> = _uiState
 
     init {
         viewModelScope.launch {
-            satelliteRepo.passes.collectLatest { passes ->
-                processing?.cancelAndJoin()
-                processing = viewModelScope.launch {
-                    while (isActive) {
-                        val timeNow = System.currentTimeMillis()
-                        val newPasses = satelliteRepo.processPasses(passes, timeNow)
-                        setPassInfo(newPasses, timeNow)
-                        delay(1000)
-                    }
+            settingsRepo.stationPosition.collect { geoPos ->
+                _uiState.update {
+                    it.copy(positionSettings = it.positionSettings.copy(isUpdating = false, stationPos = geoPos))
                 }
             }
         }
-        viewModelScope.launch {
-            settingsRepo.stationPosition.collect { geoPos ->
-                val newPosSettings = _uiState.value.positionSettings.copy(
-                    isUpdating = false, stationPos = geoPos
-                )
-                _uiState.update { it.copy(positionSettings = newPosSettings) }
-            }
-        }
         viewModelScope.launch {
             settingsRepo.databaseState.collect { state ->
-                val newDataSettings = _uiState.value.dataSettings.copy(
-                    isUpdating = false,
-                    entriesTotal = state.numberOfSatellites,
-                    radiosTotal = state.numberOfRadios,
-                    timestamp = state.updateTimestamp
-                )
-                _uiState.update { it.copy(dataSettings = newDataSettings) }
+                _uiState.update {
+                    it.copy(
+                        dataSettings = DataSettings(
+                            false,
+                            state.numberOfSatellites,
+                            state.numberOfRadios,
+                            state.updateTimestamp
+                        )
+                    )
+                }
             }
         }
         viewModelScope.launch {
@@ -126,166 +91,100 @@ class SettingsViewModel(
                 _uiState.update { it.copy(dataSourcesSettings = settings) }
             }
         }
+        viewModelScope.launch {
+            settingsRepo.radioControlSettings.collect { settings ->
+                _uiState.update { it.copy(radioControlSettings = settings) }
+            }
+        }
     }
 
-    private fun handleAction(action: SettingsAction) {
+
+    fun onAction(action: SettingsAction) {
         when (action) {
+            // Position
             SettingsAction.SetGpsPosition -> setGpsPosition()
             is SettingsAction.SetGeoPosition -> setGeoPosition(action.latitude, action.longitude)
             is SettingsAction.SetQthPosition -> setQthPosition(action.locator)
             SettingsAction.DismissPosMessages -> dismissPosMessage()
-            SettingsAction.UpdateFromWeb -> updateFromWeb()
-            is SettingsAction.UpdateTLEFromFile -> updateTLEFromFile(action.uri)
-            is SettingsAction.UpdateTransceiversFromFile -> updateTransceiversFromFile(action.uri)
-            SettingsAction.ClearAllData -> clearAllData()
-            is SettingsAction.ToggleUtc -> settingsRepo.setStateOfUtc(action.value)
-            is SettingsAction.ToggleUpdate -> settingsRepo.setStateOfAutoUpdate(action.value)
-            is SettingsAction.ToggleSweep -> settingsRepo.setStateOfSweep(action.value)
-            is SettingsAction.ToggleSensor -> settingsRepo.setStateOfSensors(action.value)
-            is SettingsAction.ToggleLightTheme -> settingsRepo.setStateOfLightTheme(action.value)
+            // Data
+            SettingsAction.UpdateFromWeb -> runDataUpdate { databaseRepo.updateFromRemote() }
+            is SettingsAction.UpdateTLEFromFile -> runDataUpdate { databaseRepo.updateTLEFromFile(action.uri) }
+            is SettingsAction.UpdateTransceiversFromFile -> runDataUpdate {
+                databaseRepo.updateTransceiversFromFile(
+                    action.uri
+                )
+            }
+            SettingsAction.ClearAllData -> viewModelScope.launch { databaseRepo.clearAllData() }
+            // Toggles
+            is SettingsAction.ToggleUtc -> settingsRepo.updateOtherSettings { it.copy(stateOfUtc = action.value) }
+            is SettingsAction.ToggleUpdate -> settingsRepo.updateOtherSettings { it.copy(stateOfAutoUpdate = action.value) }
+            is SettingsAction.ToggleSweep -> settingsRepo.updateOtherSettings { it.copy(stateOfSweep = action.value) }
+            is SettingsAction.ToggleSensor -> settingsRepo.updateOtherSettings { it.copy(stateOfSensors = action.value) }
+            is SettingsAction.ToggleLightTheme -> settingsRepo.updateOtherSettings { it.copy(stateOfLightTheme = action.value) }
+            // Remote control & data sources
+            is SettingsAction.UpdateRC -> settingsRepo.updateRCSettings(action.settings)
+            is SettingsAction.UpdateRadioControl -> settingsRepo.updateRadioControlSettings(action.settings)
+            is SettingsAction.UpdateDataSources -> settingsRepo.updateDataSourcesSettings(action.settings)
+            // System
+            is SettingsAction.ShowToast -> showToast(action.message)
         }
     }
 
-    private fun handleAction(action: RCAction) {
-        when (action) {
-            is RCAction.SetRotatorState -> settingsRepo.setRotatorState(action.value)
-            is RCAction.SetRotatorAddress -> settingsRepo.setRotatorAddress(action.value)
-            is RCAction.SetRotatorPort -> settingsRepo.setRotatorPort(action.value)
-            is RCAction.SetRotatorFormat -> settingsRepo.setRotatorFormat(action.value)
-            is RCAction.SetFrequencyState -> settingsRepo.setFrequencyState(action.value)
-            is RCAction.SetFrequencyAddress -> settingsRepo.setFrequencyAddress(action.value)
-            is RCAction.SetFrequencyPort -> settingsRepo.setFrequencyPort(action.value)
-            is RCAction.SetFrequencyFormat -> settingsRepo.setFrequencyFormat(action.value)
-            is RCAction.SetBluetoothRotatorState -> settingsRepo.setBluetoothRotatorState(action.value)
-            is RCAction.SetBluetoothRotatorAddress -> settingsRepo.setBluetoothRotatorAddress(action.value)
-            is RCAction.SetBluetoothRotatorFormat -> settingsRepo.setBluetoothRotatorFormat(action.value)
-            is RCAction.SetBluetoothRotatorName -> settingsRepo.setBluetoothRotatorName(action.value)
-            is RCAction.SetBluetoothFrequencyState -> settingsRepo.setBluetoothFrequencyState(action.value)
-            is RCAction.SetBluetoothFrequencyFormat -> settingsRepo.setBluetoothFrequencyFormat(action.value)
-            is RCAction.SetBluetoothFrequencyAddress -> settingsRepo.setBluetoothFrequencyAddress(action.value)
-        }
-    }
-
-    private fun handleAction(action: SystemAction) {
-        when (action) {
-            is SystemAction.ShowToast -> showToast(action.message)
-        }
-    }
-
-    private fun handleAction(action: DataSourcesAction) {
-        when (action) {
-            is DataSourcesAction.SetUseCustomTle ->  settingsRepo.setUseCustomTle(action.value)
-            is DataSourcesAction.SetUseCustomTransceivers ->  settingsRepo.setUseCustomTransceivers(action.value)
-            is DataSourcesAction.SetTleUrl -> settingsRepo.setTleUrl(action.value)
-            is DataSourcesAction.SetTransceiversUrl -> settingsRepo.setTransceiversUrl(action.value)
-        }
-    }
+    // region Position helpers — consolidated from 3 near-identical functions
 
     private fun setGpsPosition() {
-        if (settingsRepo.setStationPosition()) {
-            val messageResId = R.string.prefs_loc_success
-            val newPosSettings = _uiState.value.positionSettings.copy(
-                isUpdating = true, messageResId = messageResId
-            )
-            _uiState.update { it.copy(positionSettings = newPosSettings) }
-        } else {
-            val errorResId = R.string.prefs_loc_gps_error
-            val newPosSettings = _uiState.value.positionSettings.copy(
-                isUpdating = false, messageResId = errorResId
-            )
-            _uiState.update { it.copy(positionSettings = newPosSettings) }
-        }
+        updatePosition(R.string.prefs_loc_gps_error) { settingsRepo.setStationPosition() }
     }
 
     private fun setGeoPosition(latitude: Double, longitude: Double) {
-        if (settingsRepo.setStationPosition(latitude, longitude, 0.0)) {
-            val messageResId = R.string.prefs_loc_success
-            val newPosSettings = _uiState.value.positionSettings.copy(
-                isUpdating = false, messageResId = messageResId
-            )
-            _uiState.update { it.copy(positionSettings = newPosSettings) }
-        } else {
-            val errorResId = R.string.prefs_loc_input_error
-            val newPosSettings = _uiState.value.positionSettings.copy(
-                isUpdating = false, messageResId = errorResId
-            )
-            _uiState.update { it.copy(positionSettings = newPosSettings) }
-        }
+        updatePosition(R.string.prefs_loc_input_error) { settingsRepo.setStationPosition(latitude, longitude, 0.0) }
     }
 
     private fun setQthPosition(locator: String) {
-        if (settingsRepo.setStationPosition(locator)) {
-            val messageResId = R.string.prefs_loc_success
-            val newPosSettings = _uiState.value.positionSettings.copy(
-                isUpdating = false, messageResId = messageResId
-            )
-            _uiState.update { it.copy(positionSettings = newPosSettings) }
-        } else {
-            val errorResId = R.string.prefs_loc_qth_error
-            val newPosSettings = _uiState.value.positionSettings.copy(
-                isUpdating = false, messageResId = errorResId
-            )
-            _uiState.update { it.copy(positionSettings = newPosSettings) }
+        updatePosition(R.string.prefs_loc_qth_error) { settingsRepo.setStationPosition(locator) }
+    }
+
+    /**
+     * Common position update logic. Calls [action], emits success or error message.
+     */
+    private inline fun updatePosition(errorResId: Int, action: () -> Boolean) {
+        val success = action()
+        val resId = if (success) R.string.prefs_loc_success else errorResId
+        val isUpdating = success // GPS update is async; geo/qth are immediate
+        _uiState.update {
+            it.copy(positionSettings = it.positionSettings.copy(isUpdating = isUpdating, messageResId = resId))
         }
     }
 
     private fun dismissPosMessage() {
-        val newPosSettings = _uiState.value.positionSettings.copy(
-            isUpdating = false, messageResId = 0
-        )
-        _uiState.update { it.copy(positionSettings = newPosSettings) }
+        _uiState.update {
+            it.copy(positionSettings = it.positionSettings.copy(isUpdating = false, messageResId = 0))
+        }
     }
 
-    private fun updateFromWeb() = viewModelScope.launch {
+    // endregion
+
+    // region Data update helpers — consolidated from 3 near-identical functions
+
+    /**
+     * Common data update logic. Sets isUpdating=true, runs the suspending [block],
+     * and resets isUpdating=false on failure.
+     */
+    private fun runDataUpdate(block: suspend () -> Unit) = viewModelScope.launch {
         try {
-            val newDataSettings = _uiState.value.dataSettings.copy(isUpdating = true)
-            _uiState.update { it.copy(dataSettings = newDataSettings) }
-            databaseRepo.updateFromRemote()
+            _uiState.update {
+                it.copy(dataSettings = it.dataSettings.copy(isUpdating = true))
+            }
+            block()
         } catch (exception: Exception) {
-            val newDataSettings = _uiState.value.dataSettings.copy(isUpdating = false)
-            _uiState.update { it.copy(dataSettings = newDataSettings) }
+            _uiState.update {
+                it.copy(dataSettings = it.dataSettings.copy(isUpdating = false))
+            }
             println(exception)
         }
     }
 
-    private fun updateTLEFromFile(uri: String) = viewModelScope.launch {
-        try {
-            val newDataSettings = _uiState.value.dataSettings.copy(isUpdating = true)
-            _uiState.update { it.copy(dataSettings = newDataSettings) }
-            databaseRepo.updateTLEFromFile(uri)
-        } catch (exception: Exception) {
-            val newDataSettings = _uiState.value.dataSettings.copy(isUpdating = false)
-            _uiState.update { it.copy(dataSettings = newDataSettings) }
-            println(exception)
-        }
-    }
-
-    private fun updateTransceiversFromFile(uri: String) = viewModelScope.launch {
-        try {
-            val newDataSettings = _uiState.value.dataSettings.copy(isUpdating = true)
-            _uiState.update { it.copy(dataSettings = newDataSettings) }
-            databaseRepo.updateTransceiversFromFile(uri)
-        } catch (exception: Exception) {
-            val newDataSettings = _uiState.value.dataSettings.copy(isUpdating = false)
-            _uiState.update { it.copy(dataSettings = newDataSettings) }
-            println(exception)
-        }
-    }
-
-    private fun setPassInfo(passes: List<OrbitalPass>, timeNow: Long) {
-        if (passes.isEmpty()) return
-        try {
-            val nextPass = passes.first { it.aosTime.minus(timeNow) > 0 }
-            val time = nextPass.aosTime.minus(timeNow).toTimerString()
-            _uiState.update { it.copy(nextPass = nextPass, nextTime = time, isNextTimeAos = true) }
-        } catch (_: NoSuchElementException) {
-            val lastPass = passes.last()
-            val time = lastPass.losTime.minus(timeNow).toTimerString()
-            _uiState.update { it.copy(nextPass = lastPass, nextTime = time, isNextTimeAos = false) }
-        }
-    }
-
-    private fun clearAllData() = viewModelScope.launch { databaseRepo.clearAllData() }
+    // endregion
 
     companion object {
         val Factory: ViewModelProvider.Factory = viewModelFactory {
@@ -294,7 +193,6 @@ class SettingsViewModel(
                 val container = (this[applicationKey] as IContainerProvider).getMainContainer()
                 SettingsViewModel(
                     container.databaseRepo,
-                    container.satelliteRepo,
                     container.settingsRepo,
                     container.provideShowToast()
                 )

gradle/libs.versions.toml

@@ -1,8 +1,8 @@
 [versions]
 #noinspection UnusedVersionCatalogEntry
-appVersionCode = "411"
+appVersionCode = "420"
 #noinspection UnusedVersionCatalogEntry
-appVersionName = "4.1.1"
+appVersionName = "4.2.0"
 #noinspection UnusedVersionCatalogEntry
 compileSdk = "36"
 #noinspection UnusedVersionCatalogEntry
@@ -12,7 +12,7 @@ jdkVersion = "17"
 #noinspection UnusedVersionCatalogEntry
 packageName = "com.rtbishop.look4sat"
 
-android-gradle-plugin = "9.0.1"
+android-gradle-plugin = "9.1.0"
 google-ksp = "2.3.6"
 kotlin = "2.3.20"
 
@@ -20,7 +20,7 @@ androidx-core-ktx = "1.18.0"
 androidx-core-splashscreen = "1.2.0"
 androidx-room = "2.8.4"
 
-compose-bom = "2026.03.00"
+compose-bom = "2026.03.01"
 compose-activity = "1.13.0"
 compose-lifecycle = "2.10.0"
 compose-navigation = "2.9.7"
@@ -88,11 +88,11 @@ compose-compiler = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "
 google-ksp = { id = "com.google.devtools.ksp", version.ref = "google-ksp" }
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 # plugins defined by this project
-convention-androidAppPlugin = { id = "com.rtbishop.look4sat.convention.androidAppPlugin" }
-convention-androidLibraryPlugin = { id = "com.rtbishop.look4sat.convention.androidLibraryPlugin" }
-convention-composeFeaturePlugin = { id = "com.rtbishop.look4sat.convention.composeFeaturePlugin" }
-convention-composeLibraryPlugin = { id = "com.rtbishop.look4sat.convention.composeLibraryPlugin" }
-convention-kotlinLibraryPlugin = { id = "com.rtbishop.look4sat.convention.kotlinLibraryPlugin" }
+convention-applicationPlugin = { id = "com.rtbishop.look4sat.convention.applicationPlugin" }
+convention-coreDataPlugin = { id = "com.rtbishop.look4sat.convention.coreDataPlugin" }
+convention-coreDomainPlugin = { id = "com.rtbishop.look4sat.convention.coreDomainPlugin" }
+convention-corePresentationPlugin = { id = "com.rtbishop.look4sat.convention.corePresentationPlugin" }
+convention-featurePlugin = { id = "com.rtbishop.look4sat.convention.featurePlugin" }
 
 [bundles]
 #noinspection UnusedVersionCatalogEntry

settings.gradle.kts

@@ -24,6 +24,7 @@ include(
     ":feature:map",
     ":feature:passes",
     ":feature:radar",
+    ":feature:radiocontrol",
     ":feature:satellites",
     ":feature:settings"
 )