Add LICENSE.md

.idea/deploymentTargetSelector.xml

@@ -4,7 +4,7 @@
     <selectionStates>
       <SelectionState runConfigName="app">
         <option name="selectionMode" value="DROPDOWN" />
-        <DropdownSelection timestamp="2025-03-18T16:06:30.698647383Z">
+        <DropdownSelection timestamp="2025-04-05T11:04:12.656433726Z">
           <Target type="DEFAULT_BOOT">
             <handle>
               <DeviceId pluginId="PhysicalDevice" identifier="serial=d3e11beb" />

LICENSE.md

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Fritz Heiden
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

app/build.gradle.kts

@@ -6,7 +6,7 @@ plugins {
 
 android {
     namespace = "com.example.tvcontroller"
-    compileSdk = 34
+    compileSdk = 35
 
     defaultConfig {
         applicationId = "com.example.tvcontroller"
@@ -52,6 +52,16 @@ dependencies {
     implementation(libs.androidx.navigation.compose)
     implementation(libs.ktor.client.core)
     implementation(libs.ktor.client.cio)
+    implementation(libs.ktor.client.websockets)
+    implementation(libs.androidx.camera.core)
+    implementation(libs.androidx.camera.camera2)
+    implementation(libs.androidx.camera.lifecycle)
+    implementation(libs.androidx.camera.video)
+    implementation(libs.androidx.camera.view)
+    implementation(libs.androidx.camera.mlkit.vision)
+    implementation(libs.androidx.camera.extensions)
+    implementation(libs.material3)
+    implementation(libs.stream.webrtc.android)
     testImplementation(libs.junit)
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)

app/src/main/AndroidManifest.xml

@@ -1,10 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-feature
+        android:name="android.hardware.camera"
+        android:required="false" />
+    <uses-feature android:name="android.hardware.bluetooth" />
+
     <uses-permission android:name="android.permission.BLUETOOTH" />
+    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
     <uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
     <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
 
     <application
         android:allowBackup="true"
@@ -18,6 +28,7 @@
         tools:targetApi="31">
         <activity
             android:name=".MainActivity"
+            android:windowSoftInputMode="adjustResize"
             android:exported="true"
             android:theme="@style/Theme.TVController">
             <intent-filter>

app/src/main/java/com/example/tvcontroller/MainActivity.kt

@@ -1,156 +1,85 @@
 package com.example.tvcontroller
 
-import android.bluetooth.BluetoothAdapter
-import android.content.ContentValues.TAG
 import android.os.Bundle
 import android.util.Log
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
-import androidx.activity.viewModels
+import androidx.core.app.ActivityCompat
-import androidx.compose.foundation.layout.Arrangement
+import androidx.lifecycle.lifecycleScope
-import androidx.compose.foundation.layout.Column
+import com.example.tvcontroller.client.WebClient
-import androidx.compose.foundation.layout.fillMaxSize
+import com.example.tvcontroller.client.WebsocketClient
-import androidx.compose.foundation.layout.padding
-import androidx.compose.material3.Button
-import androidx.compose.material3.Icon
-import androidx.compose.material3.NavigationBar
-import androidx.compose.material3.NavigationBarItem
-import androidx.compose.material3.Scaffold
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Modifier
-import androidx.navigation.NavHostController
-import androidx.navigation.compose.NavHost
-import androidx.navigation.compose.composable
-import androidx.navigation.compose.currentBackStackEntryAsState
-import androidx.navigation.compose.rememberNavController
-import com.example.tvcontroller.ui.theme.TVControllerTheme
-import androidx.compose.runtime.getValue
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.res.painterResource
-import androidx.lifecycle.viewmodel.compose.viewModel
 import com.example.tvcontroller.services.BluetoothService
+import com.example.tvcontroller.services.CameraService
+import com.example.tvcontroller.services.ControllerService
 import com.example.tvcontroller.services.DeviceService
-import com.example.tvcontroller.ui.AppViewModel
+import com.example.tvcontroller.services.webrtc.WebRtcService
+import com.example.tvcontroller.ui.theme.TVControllerTheme
+import com.example.tvcontroller.ui.views.MainView
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 
+const val TAG = "MainActivity"
 
 class MainActivity : ComponentActivity() {
-    private lateinit var bluetoothService: BluetoothService
+    private val webClient by lazy { WebClient() }
-    private lateinit var deviceService: DeviceService
+    private val websocketClient by lazy { WebsocketClient(webClient.client) }
-    private val appViewModel by viewModels<AppViewModel>()
+    private val cameraService by lazy { CameraService(applicationContext) }
+    private val webRtcService by lazy {
+        WebRtcService(
+            applicationContext,
+            websocketClient,
+            cameraService
+        )
+    }
+    private val bluetoothService by lazy { BluetoothService(applicationContext) }
+    private val deviceService by lazy { DeviceService(applicationContext, webClient, websocketClient) }
+    private val controllerService by lazy { ControllerService(bluetoothService, webRtcService) }
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        bluetoothService = BluetoothService(this.applicationContext)
+        checkPermissions()
-        bluetoothService.onBluetoothStateChanged { state -> appViewModel.setBluetoothEnabled(state == BluetoothAdapter.STATE_ON) }
+
-        appViewModel.setBluetoothEnabled(bluetoothService.isBluetoothEnabled())
+        lifecycleScope.launch {
-        deviceService = DeviceService(this.applicationContext)
+            deviceService.onStatusChanged {
+                when (it) {
+                    DeviceService.STATUS_REGISTERED -> {
+                        lifecycleScope.launch(Dispatchers.IO) {
+                            websocketClient.connect(deviceService.serverAddress, deviceService.token)
+                        }
+                        webRtcService.connect()
+                    }
+                    DeviceService.STATUS_UNREGISTERED -> {
+                        Log.i(TAG, "Device unregistered")
+                    }
+                }
+            }
+            deviceService.initialize()
+        }
         enableEdgeToEdge()
         setContent {
             TVControllerTheme {
-                TvControllerApp(
+                MainView(
-                    appViewModel = appViewModel,
+                    deviceService = deviceService,
+                    controllerService = controllerService,
                     bluetoothService = bluetoothService,
-                    deviceService = deviceService
+                    webRtcService = webRtcService,
+                    cameraService = cameraService
                 )
             }
         }
     }
-}
 
-@Composable
+    private fun checkPermissions() {
-fun TvControllerApp(
+        Log.i(TAG, "Checking permissions")
-    navController: NavHostController = rememberNavController(),
+        if (!bluetoothService.hasRequiredPermissions()) {
-    appViewModel: AppViewModel = viewModel(),
+            Log.i(TAG, "Requesting Bluetooth permissions")
-    bluetoothService: BluetoothService? = null,
+            ActivityCompat.requestPermissions(this, BluetoothService.BLUETOOTH_PERMISSIONS, 0)
-    deviceService: DeviceService
-) {
-    val backStackEntry by navController.currentBackStackEntryAsState()
-    val currentScreen = Screen.valueOf(backStackEntry?.destination?.route ?: Screen.Camera.name)
-    val baselineCamera24 = painterResource(R.drawable.baseline_camera_24)
-    val baselineRemote24 = painterResource(R.drawable.baseline_settings_remote_24)
-    val baselineSettings24 = painterResource(R.drawable.baseline_settings_24)
-    Scaffold(modifier = Modifier.fillMaxSize(), bottomBar = {
-        NavigationBar {
-            NavigationBarItem(
-                onClick = { navController.navigate(Screen.Camera.name) },
-                icon = {
-                    Icon(
-                        baselineCamera24,
-                        contentDescription = "Camera"
-                    )
-                },
-                label = { Text("Camera") },
-                selected = currentScreen == Screen.Camera
-            )
-            NavigationBarItem(
-                onClick = { navController.navigate(Screen.Remote.name) },
-                icon = {
-                    Icon(
-                        baselineRemote24,
-                        contentDescription = "Remote"
-                    )
-                },
-                label = { Text("Remote") },
-                selected = currentScreen == Screen.Remote
-            )
-            NavigationBarItem(
-                onClick = { navController.navigate(Screen.Settings.name) },
-                icon = {
-                    Icon(
-                        baselineSettings24,
-                        contentDescription = "Settings"
-                    )
-                },
-                label = { Text("Settings") },
-                selected = currentScreen == Screen.Settings
-            )
-        }
-    }) { innerPadding ->
-        Column {
-            NavHost(
-                navController = navController,
-                startDestination = Screen.Camera.name,
-                modifier = Modifier.padding(innerPadding)
-            ) {
-                composable(route = Screen.Camera.name) {
-                    CameraScreen()
-                }
-                composable(route = Screen.Remote.name) {
-                    RemoteScreen()
-                }
-                composable(route = Screen.Settings.name) {
-                    SettingsScreen(appViewModel = appViewModel, deviceService = deviceService)
-                }
         }
+        if (!cameraService.hasRequiredPermissions()) {
+            Log.i(TAG, "Requesting Camera permissions")
+            ActivityCompat.requestPermissions(this, CameraService.CAMERA_PERMISSIONS, 0)
         }
     }
 }
 
-@Composable
-fun CameraScreen(modifier: Modifier = Modifier) {
-    Column(
-        modifier = modifier
-            .fillMaxSize(),
-        horizontalAlignment = Alignment.CenterHorizontally,
-        verticalArrangement = Arrangement.Center
-    ) {
-        Text(text = "Camera Screen", modifier = modifier)
-    }
-}
-
-@Composable
-fun RemoteScreen(modifier: Modifier = Modifier) {
-    Column(
-        modifier = modifier
-            .fillMaxSize(),
-        horizontalAlignment = Alignment.CenterHorizontally,
-        verticalArrangement = Arrangement.Center
-    ) {
-        Text(text = "Remote Screen", modifier = modifier)
-        Button(onClick = { Log.i(TAG, "RemoteScreen: Button clicked") }) {
-            Text(text = "Button")
-        }
-    }
-}

app/src/main/java/com/example/tvcontroller/Screen.kt

@@ -1,7 +0,0 @@
-package com.example.tvcontroller
-
-enum class Screen {
-    Camera,
-    Remote,
-    Settings
-}

app/src/main/java/com/example/tvcontroller/Settings.kt

@@ -1,8 +0,0 @@
-package com.example.tvcontroller
-
-object Settings {
-    enum class ConnectionState {
-        Unregistered,
-        Registered,
-    }
-}

app/src/main/java/com/example/tvcontroller/SettingsScreen.kt

@@ -1,96 +0,0 @@
-package com.example.tvcontroller
-
-import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.rememberScrollState
-import androidx.compose.foundation.verticalScroll
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.OutlinedButton
-import androidx.compose.material3.OutlinedTextField
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.unit.dp
-import androidx.lifecycle.viewmodel.compose.viewModel
-import com.example.tvcontroller.services.DeviceService
-import com.example.tvcontroller.ui.AppViewModel
-
-@Composable
-fun SettingsScreen(deviceService: DeviceService, appViewModel: AppViewModel) {
-    val viewModel =
-        viewModel<SettingsViewModel>(factory = SettingsViewModel.provideFactory(deviceService))
-
-    Column(
-        modifier = Modifier
-            .padding(16.dp, 16.dp)
-            .verticalScroll(rememberScrollState()),
-        verticalArrangement = Arrangement.spacedBy(8.dp)
-    ) {
-        Text(
-            text = stringResource(id = R.string.settings_title),
-            style = MaterialTheme.typography.displaySmall
-        )
-        Spacer(modifier = Modifier.padding(8.dp))
-        Text(
-            text = stringResource(id = R.string.server_settings_heading),
-            style = MaterialTheme.typography.headlineSmall
-        )
-        Text(
-            text = stringResource(id = R.string.server_connection_label) + ": " + getConnectionStateString(
-                viewModel.connectionState
-            ),
-            style = MaterialTheme.typography.bodyMedium
-        )
-        OutlinedTextField(
-            modifier = Modifier.fillMaxWidth(),
-            value = viewModel.serverAddress,
-            onValueChange = viewModel::onServerAddressChanged,
-            label = { Text(stringResource(id = R.string.server_address_label)) }
-        )
-        OutlinedTextField(
-            modifier = Modifier.fillMaxWidth(),
-            value = viewModel.deviceName,
-            onValueChange = viewModel::onDeviceNameChanged,
-            label = { Text(stringResource(id = R.string.device_name_label)) }
-        )
-        OutlinedTextField(
-            modifier = Modifier.fillMaxWidth(),
-            value = viewModel.registrationCode,
-            onValueChange = viewModel::onRegistrationCodeChanged,
-            label = { Text(stringResource(id = R.string.registration_code_label)) }
-        )
-        OutlinedButton(onClick = { viewModel.connect() }, modifier = Modifier.fillMaxWidth()) {
-            Text(
-                stringResource(id = R.string.connect_button_label)
-            )
-        }
-        Spacer(modifier = Modifier.padding(8.dp))
-        Text(
-            text = stringResource(id = R.string.controller_settings_heading),
-            style = MaterialTheme.typography.headlineSmall
-        )
-        if (appViewModel.isBluetoothEnabled()) {
-            Text(
-                text = "Controller settings: Bluetooth is enabled.",
-                style = MaterialTheme.typography.bodyMedium
-            )
-        } else {
-            Text(
-                text = "Bluetooth is disabled. Please enable it in settings.",
-                style = MaterialTheme.typography.bodyMedium
-            )
-        }
-    }
-}
-
-@Composable
-fun getConnectionStateString(state: Settings.ConnectionState): String {
-    return when (state) {
-        Settings.ConnectionState.Unregistered -> stringResource(id = R.string.connection_state_unregistered)
-        Settings.ConnectionState.Registered -> stringResource(id = R.string.connection_state_registered)
-    }
-}

app/src/main/java/com/example/tvcontroller/SettingsViewModel.kt

@@ -1,79 +0,0 @@
-package com.example.tvcontroller
-
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.setValue
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.ViewModelProvider
-import androidx.lifecycle.viewModelScope
-import com.example.tvcontroller.services.DeviceService
-import kotlinx.coroutines.launch
-
-class SettingsViewModel(private val deviceService: DeviceService) : ViewModel() {
-    var serverAddress by mutableStateOf(deviceService.getServerAddress())
-        private set
-    var deviceName by mutableStateOf(android.os.Build.MANUFACTURER + " " + android.os.Build.MODEL)
-        private set
-    var registrationCode by mutableStateOf("")
-        private set
-    var connectionState by mutableStateOf(Settings.ConnectionState.Unregistered)
-        private set
-
-    init {
-        updateConnectionState()
-        viewModelScope.launch {
-            updateDeviceInfo()
-        }
-    }
-
-    fun connect() {
-        //Log.i("SettingsScreen", "Save settings: $serverUrl, $deviceName, $registrationCode")
-        viewModelScope.launch {
-            deviceService.setServerAddress(serverAddress)
-            deviceService.createIntegration(deviceName, registrationCode)
-            updateConnectionState()
-        }
-    }
-
-    private fun updateConnectionState() {
-        connectionState = if (deviceService.getToken().isEmpty()) {
-            Settings.ConnectionState.Unregistered
-            return
-        } else {
-            Settings.ConnectionState.Registered
-        }
-    }
-
-    private suspend fun updateDeviceInfo() {
-        if (connectionState == Settings.ConnectionState.Unregistered) return
-        val integration = deviceService.getIntegration()
-        if (integration == null) {
-            connectionState = Settings.ConnectionState.Unregistered
-            return
-        }
-        deviceName = integration.name
-    }
-
-    fun onServerAddressChanged(url: String) {
-        serverAddress = url
-    }
-
-    fun onDeviceNameChanged(name: String) {
-        deviceName = name
-    }
-
-    fun onRegistrationCodeChanged(code: String) {
-        registrationCode = code
-    }
-
-    companion object {
-        fun provideFactory(
-            deviceService: DeviceService,
-        ) = object : ViewModelProvider.Factory {
-            @Suppress("UNCHECKED_CAST")
-            override fun <T : ViewModel> create(modelClass: Class<T>): T {
-                return SettingsViewModel(deviceService) as T
-            }
-        }
-    }
-}

app/src/main/java/com/example/tvcontroller/client/WebClient.kt

@@ -0,0 +1,54 @@
+package com.example.tvcontroller.client
+
+import android.util.Log
+import io.ktor.client.HttpClient
+import io.ktor.client.engine.cio.CIO
+import io.ktor.client.plugins.websocket.WebSockets
+import io.ktor.client.request.cookie
+import io.ktor.client.request.headers
+import io.ktor.client.request.request
+import io.ktor.client.request.setBody
+import io.ktor.client.statement.HttpResponse
+import io.ktor.http.HttpMethod
+import org.json.JSONObject
+
+private const val TAG = "WebClient"
+
+class WebClient {
+    val client = HttpClient(CIO) {
+        install(WebSockets)
+    }
+    var defaultCookies = mutableMapOf<String, String>()
+
+    suspend fun sendRequest(
+        url: String,
+        method: HttpMethod,
+        headers: Map<String, String> = emptyMap(),
+        body: String? = ""
+    ): HttpResponse? {
+        try {
+            val response = client.request(url) {
+                this.method = method
+                setBody(body)
+                headers {
+                    headers.forEach { (key, value) ->
+                        append(key, value)
+                    }
+                }
+                defaultCookies.forEach { (key, value) ->
+                    cookie(name = key, value = value)
+                }
+            }
+            return response
+        } catch (e: Exception) {
+            Log.e(TAG, "error sending json request", e)
+        }
+        return null
+    }
+
+    suspend fun sendJsonRequest(url: String, method: HttpMethod, json: JSONObject): HttpResponse? {
+        val headers = mutableMapOf<String, String>()
+        headers.put("Content-Type", "application/json")
+        return sendRequest(url, method, headers = headers, body = json.toString())
+    }
+}

app/src/main/java/com/example/tvcontroller/client/WebsocketClient.kt

@@ -0,0 +1,67 @@
+package com.example.tvcontroller.client
+
+import android.util.Log
+import io.ktor.client.HttpClient
+import io.ktor.client.plugins.websocket.webSocket
+import io.ktor.client.request.cookie
+import io.ktor.http.HttpMethod
+import io.ktor.websocket.DefaultWebSocketSession
+import io.ktor.websocket.Frame
+import io.ktor.websocket.readText
+import org.json.JSONObject
+
+private const val TAG = "WebsocketClient"
+
+class WebsocketClient(private val client: HttpClient) {
+    private var websocket: DefaultWebSocketSession? = null
+    private val dataHandlers = mutableListOf<(String) -> Unit>()
+    private val connectedHandlers = mutableListOf<() -> Unit>()
+    private val disconnectedHandlers = mutableListOf<() -> Unit>()
+
+    suspend fun connect(serverAddress: String, token: String) {
+        Log.i(TAG, "Connecting to websocket at $serverAddress")
+        val (host, port) = serverAddress.split(":")
+        val portInt = if (port.isEmpty()) 80 else port.toInt()
+        connectedHandlers.forEach { it() }
+        client.webSocket(
+            method = HttpMethod.Get,
+            host = host,
+            port = portInt,
+            path = "/ws",
+            request = {
+                cookie(name = "token", value = token)
+            }
+        ) {
+            Log.i(TAG, "Listening for incoming websocket messages")
+            websocket = this
+            while (true) {
+                val frame = incoming.receive()
+                Log.d(TAG, "Received frame: $frame")
+                if (frame is Frame.Text) {
+                    val dataString = frame.readText()
+                    dataHandlers.forEach { it(dataString) }
+                }
+            }
+        }
+        Log.i(TAG, "Websocket connection closed")
+        disconnectedHandlers.forEach { it() }
+    }
+
+    fun onConnected(handler: () -> Unit) {
+        connectedHandlers.add(handler)
+    }
+
+    fun onDisconnected(handler: () -> Unit) {
+        disconnectedHandlers.add(handler)
+    }
+
+    fun onData(handler: (String) -> Unit) {
+        Log.d(TAG, "Adding data handler")
+        dataHandlers.add(handler)
+    }
+
+    suspend fun sendJson(json: JSONObject) {
+        val frame = Frame.Text(json.toString())
+        websocket?.send(frame)
+    }
+}

app/src/main/java/com/example/tvcontroller/data/BluetoothDevice.kt

@@ -0,0 +1,27 @@
+package com.example.tvcontroller.data
+
+import android.util.Log
+
+class BluetoothDevice(name: String?, address: String?) {
+    private var _name: String? = name
+    private var _address: String? = address
+
+    fun getName(): String {
+        return if (_name.isNullOrEmpty()) getAddress() else _name!!
+    }
+
+    fun getAddress(): String {
+        return if (_address == null) "" else _address!!
+    }
+
+    companion object {
+        fun fromBluetoothDevice(device: android.bluetooth.BluetoothDevice): BluetoothDevice {
+            try {
+                return BluetoothDevice(device.name, device.address)
+            } catch (e: SecurityException) {
+                Log.e("BluetoothDevice", "Error creating BluetoothDevice", e)
+            }
+            return BluetoothDevice(null, null)
+        }
+    }
+}

app/src/main/java/com/example/tvcontroller/data/RemoteCommand.kt

@@ -0,0 +1,7 @@
+package com.example.tvcontroller.data
+
+class RemoteCommand {
+    var protocol: String? = null
+    var device: String? = null
+    var command: String? = null
+}

app/src/main/java/com/example/tvcontroller/services/BluetoothService.kt

@@ -1,66 +1,191 @@
 package com.example.tvcontroller.services
 
+import android.Manifest
 import android.bluetooth.BluetoothAdapter
 import android.bluetooth.BluetoothManager
+import android.bluetooth.BluetoothSocket
 import android.content.Context
 import android.content.Intent
 import android.content.BroadcastReceiver
 import android.content.IntentFilter
+import android.content.pm.PackageManager
+import android.os.Build
+import android.util.Log
 import androidx.core.content.ContextCompat.getSystemService
+import com.example.tvcontroller.data.BluetoothDevice
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.io.IOException
+import java.util.UUID
+
+private const val SERIAL_PORT_SERVICE_UUID = "00001101-0000-1000-8000-00805F9B34FB"
+private const val TAG = "BluetoothService"
 
 class BluetoothService(private val context: Context) {
     private var bluetoothManager: BluetoothManager =
-        getSystemService(context, BluetoothManager::class.java)!!;
+        getSystemService(context, BluetoothManager::class.java)!!
     private var bluetoothAdapter: BluetoothAdapter = bluetoothManager.adapter
-    private var bluetoothStateReceiver: BroadcastReceiver? = null
+
-    private var bluetoothStateChangedCallbacks: MutableList<(Int) -> Unit> = mutableListOf()
+    private val _pairedDevices = MutableStateFlow<List<BluetoothDevice>>(emptyList())
+    var pairedDevices: StateFlow<List<BluetoothDevice>> = _pairedDevices.asStateFlow()
+    private var clientSocket: BluetoothSocket? = null
+
+    private var bluetoothStateChangedCallbacks: MutableList<(String) -> Unit> = mutableListOf()
+    private var bluetoothStateReceiver: BroadcastReceiver? = object : BroadcastReceiver() {
+        override fun onReceive(context: Context, intent: Intent) {
+            val btState = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR)
+            Log.i(TAG, "Bluetooth state changed to: $btState")
+            state = parseBluetoothState(btState)
+        }
+    }
+    var currentDevice: BluetoothDevice? = null
+        private set
+
+    var state: String = STATE_OFF
+        private set(value) {
+            if (value != STATE_CONNECTED && value != STATE_CONNECTING) currentDevice = null
+            Log.i(TAG, "Bluetooth state changed to: $value")
+            bluetoothStateChangedCallbacks.forEach { it(value) }
+            field = value
+        }
 
     init {
-        registerBluetoothStateReceiver()
+        state = parseBluetoothState(bluetoothAdapter.state)
+        context.registerReceiver(
+            bluetoothStateReceiver, IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED)
+        )
+        updatePairedDevices()
+    }
+
+    private fun parseBluetoothState(state: Int): String {
+        return when (state) {
+            BluetoothAdapter.STATE_OFF -> STATE_OFF
+            BluetoothAdapter.STATE_TURNING_OFF -> STATE_OFF
+            BluetoothAdapter.STATE_TURNING_ON -> STATE_OFF
+            BluetoothAdapter.STATE_ON -> STATE_DISCONNECTED
+            else -> STATE_DISCONNECTED
+        }
     }
 
     fun isBluetoothEnabled(): Boolean {
-        return bluetoothAdapter.isEnabled ?: false
+        return bluetoothAdapter.isEnabled
     }
 
-    private fun registerBluetoothStateReceiver() {
+    fun onBluetoothStateChanged(callback: (String) -> Unit) {
-        bluetoothStateReceiver = object : BroadcastReceiver() {
-            override fun onReceive(context: Context, intent: Intent) {
-                val state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR)
-                bluetoothStateChangedCallbacks.forEach { it(state) }
-                when (state) {
-                    BluetoothAdapter.STATE_ON -> {
-                        // Handle Bluetooth turned on
-                        println("SIGNAL: Bluetooth is enabled")
-                    }
-                    BluetoothAdapter.STATE_OFF -> {
-                        // Handle Bluetooth turned off
-                        println("SIGNAL: Bluetooth is disabled")
-                    }
-                    BluetoothAdapter.STATE_TURNING_ON -> {
-                        // Handle Bluetooth turning on
-                        println("SIGNAL: Bluetooth is turning on")
-                    }
-                    BluetoothAdapter.STATE_TURNING_OFF -> {
-                        // Handle Bluetooth turning off
-                        println("SIGNAL: Bluetooth is turning off")
-                    }
-                }
-            }
-        }
-
-        context.registerReceiver(bluetoothStateReceiver, IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED))
-    }
-
-    fun onBluetoothStateChanged(callback: (Int) -> Unit) {
         bluetoothStateChangedCallbacks.add(callback)
     }
 
-    fun offBluetoothStateChanged(callback: (Int) -> Unit) {
+    fun offBluetoothStateChanged(callback: (String) -> Unit) {
         bluetoothStateChangedCallbacks.remove(callback)
     }
 
     fun cleanUp() {
         context.unregisterReceiver(bluetoothStateReceiver)
+        bluetoothStateChangedCallbacks.clear()
+        closeBluetoothConnection()
+    }
+
+    fun updatePairedDevices() {
+        try {
+            _pairedDevices.update {
+                bluetoothAdapter.bondedDevices.toList()
+                    .map { device -> BluetoothDevice.fromBluetoothDevice(device) }
+            }
+        } catch (e: SecurityException) {
+            println("Error updating paired devices: $e")
+        }
+    }
+
+    fun connectToDevice(device: BluetoothDevice) {
+        currentDevice = device
+        state = STATE_CONNECTING
+        Log.i(TAG, "Initiating connection process")
+        if (context.checkSelfPermission(Manifest.permission.BLUETOOTH_ADMIN) != PackageManager.PERMISSION_GRANTED) {
+            Log.e(TAG, "Bluetooth permission not granted")
+            state = STATE_DISCONNECTED
+            return
+        }
+        Log.i(TAG, "Connecting to device: $device")
+        try {
+            var androidBluetoothDevice = bluetoothAdapter.getRemoteDevice(device.getAddress())
+            Log.i(TAG, "Creating socket to device: $device")
+            clientSocket = androidBluetoothDevice.createRfcommSocketToServiceRecord(
+                UUID.fromString(SERIAL_PORT_SERVICE_UUID)
+            )
+            Log.i(TAG, "Connecting to socket")
+            clientSocket?.connect()
+            currentDevice = device
+            state = STATE_CONNECTED
+            Log.i(TAG, "Connected to device: $device")
+            listenForIncomingData()
+        } catch (e: IOException) {
+            state = STATE_DISCONNECTED
+            Log.e(TAG, "Error connecting to device: $e")
+        }
+    }
+
+    fun hasRequiredPermissions(): Boolean {
+        return BLUETOOTH_PERMISSIONS.all {
+            context.checkSelfPermission(it) == PackageManager.PERMISSION_GRANTED
+        }
+    }
+
+    fun closeBluetoothConnection() {
+        clientSocket?.close()
+        clientSocket = null
+        currentDevice = null
+        state = STATE_DISCONNECTED
+    }
+
+    private fun listenForIncomingData() {
+        if (clientSocket == null || !clientSocket!!.isConnected) return
+        Log.i(TAG, "Listening for incoming data")
+        val buffer = ByteArray(1024)
+        while (true) {
+            try {
+                val bytesRead = clientSocket?.inputStream?.read(buffer)
+                if (bytesRead != null && bytesRead != -1) {
+                    val data = buffer.decodeToString(endIndex = bytesRead)
+                    Log.i(TAG, "Received data: $data")
+                }
+            } catch (e: IOException) {
+                Log.e(TAG, "Error reading from socket: $e")
+            } catch (e: Exception) {
+                Log.e(TAG, "Error receiving data: $e")
+            }
+        }
+    }
+
+    fun sendData(data: String) {
+        if (clientSocket == null || !clientSocket!!.isConnected) return
+        try {
+            val bytes = data.encodeToByteArray()
+            clientSocket?.outputStream?.write(bytes)
+            Log.i(TAG, "Sent data: $data")
+        } catch (e: IOException) {
+            Log.e(TAG, "Error writing to socket: $e")
+            closeBluetoothConnection()
+        }
+    }
+
+    companion object {
+        const val STATE_OFF = "off"
+        const val STATE_DISCONNECTED = "disconnected"
+        const val STATE_CONNECTING = "connecting"
+        const val STATE_CONNECTED = "connected"
+        val BLUETOOTH_PERMISSIONS = if (Build.VERSION.SDK_INT < Build.VERSION_CODES.S) {
+            arrayOf(
+                Manifest.permission.BLUETOOTH, Manifest.permission.BLUETOOTH_ADMIN
+            )
+        } else {
+            arrayOf(
+                Manifest.permission.BLUETOOTH,
+                Manifest.permission.BLUETOOTH_CONNECT,
+                Manifest.permission.BLUETOOTH_SCAN,
+                Manifest.permission.BLUETOOTH_ADMIN
+            )
+        }
     }
 }

app/src/main/java/com/example/tvcontroller/services/CameraService.kt

@@ -0,0 +1,57 @@
+package com.example.tvcontroller.services
+
+import android.content.Context
+import android.content.pm.PackageManager
+import android.hardware.camera2.CameraCharacteristics
+import android.hardware.camera2.CameraManager
+import org.webrtc.Camera2Capturer
+import org.webrtc.DefaultVideoDecoderFactory
+import org.webrtc.EglBase
+import org.webrtc.HardwareVideoEncoderFactory
+import org.webrtc.SimulcastVideoEncoderFactory
+import org.webrtc.SoftwareVideoEncoderFactory
+
+class CameraService(private val context: Context) {
+    var eglBaseContext: EglBase.Context = EglBase.create().eglBaseContext
+    val cameraManager by lazy { context.getSystemService(Context.CAMERA_SERVICE) as CameraManager }
+    val videoDecoderFactory by lazy { DefaultVideoDecoderFactory(eglBaseContext) }
+    val videoEncoderFactory by lazy {
+        SimulcastVideoEncoderFactory(
+            HardwareVideoEncoderFactory(eglBaseContext, true, true),
+            SoftwareVideoEncoderFactory()
+        )
+    }
+
+    fun createCameraCapturer(): Camera2Capturer {
+        val ids = cameraManager.cameraIdList
+        var foundCamera = false;
+        var cameraId = ""
+        for (id in ids) {
+            val characteristics = cameraManager.getCameraCharacteristics(id)
+            val facing = characteristics.get(CameraCharacteristics.LENS_FACING)
+            if (facing == CameraCharacteristics.LENS_FACING_BACK) {
+                cameraId = id
+                foundCamera = true
+                break
+            }
+        }
+        if (!foundCamera) {
+            cameraId = ids.first()
+        }
+        val cameraCapturer = Camera2Capturer(context, cameraId, null)
+        return cameraCapturer
+    }
+
+    fun hasRequiredPermissions(): Boolean {
+        return CAMERA_PERMISSIONS.all {
+            context.checkSelfPermission(it) == PackageManager.PERMISSION_GRANTED
+        }
+    }
+
+    companion object {
+        val CAMERA_PERMISSIONS = arrayOf(
+            android.Manifest.permission.CAMERA,
+            android.Manifest.permission.RECORD_AUDIO
+        )
+    }
+}

app/src/main/java/com/example/tvcontroller/services/ControllerService.kt

@@ -0,0 +1,105 @@
+package com.example.tvcontroller.services
+
+import android.util.Log
+import com.example.tvcontroller.data.RemoteCommand
+import com.example.tvcontroller.services.webrtc.WebRtcService
+import org.json.JSONObject
+import java.nio.ByteBuffer
+import java.nio.charset.StandardCharsets
+
+
+class ControllerService(
+    private val bluetoothService: BluetoothService,
+    private val webRtcService: WebRtcService
+) {
+    init {
+        loadCommands()
+        webRtcService.onDataChannelData(this::handleWebRtcData)
+    }
+
+    fun sendCommand(command: RemoteCommand) {
+        val jsonString = remoteCommandToJsonString(command)
+        Log.i(TAG, "Sending command: $jsonString")
+        sendData(jsonString)
+    }
+
+    fun remoteCommandToJsonString(command: RemoteCommand): String {
+        var commandObject = JSONObject()
+        commandObject.put("protocol", command.protocol)
+        commandObject.put("device", command.device)
+        commandObject.put("command", command.command)
+        return commandObject.toString()
+    }
+
+    fun sendData(data: String) {
+        bluetoothService.sendData(data)
+    }
+
+    fun loadCommands() {
+    }
+
+    fun handleWebRtcData(data: ByteBuffer) {
+        val dataString = StandardCharsets.UTF_8.decode(data).toString()
+        val json = JSONObject(dataString)
+        if (!json.has("type") || json.getString("type") != MESSAGE_TYPE_COMMAND) return
+        val commandJson = json.getJSONObject("data")
+        val protocol = if (commandJson.has("protocol")) commandJson.getString("protocol") else null
+        val device = if (commandJson.has("device")) commandJson.getString("device") else null
+        val command = if (commandJson.has("commandNumber")) commandJson.getString("commandNumber") else null
+        val remoteCommand = RemoteCommand().apply {
+            this.protocol = protocol
+            this.device = device
+            this.command = command
+        }
+        sendCommand(remoteCommand)
+    }
+
+    companion object {
+        private const val TAG = "ControllerService"
+
+        const val MESSAGE_TYPE_COMMAND = "command"
+
+        const val POWER = "POWER"
+        const val CURSOR_UP = "CURSOR UP"
+        const val CURSOR_DOWN = "CURSOR DOWN"
+        const val CURSOR_LEFT = "CURSOR LEFT"
+        const val CURSOR_RIGHT = "CURSOR RIGHT"
+        const val ENTER = "ENTER"
+        const val ONE = "1"
+        const val TWO = "2"
+        const val THREE = "3"
+        const val FOUR = "4"
+        const val FIVE = "5"
+        const val SIX = "6"
+        const val SEVEN = "7"
+        const val EIGHT = "8"
+        const val NINE = "9"
+        const val ZERO = "0"
+        const val CHANNEL_UP = "CHANNEL +"
+        const val CHANNEL_DOWN = "CHANNEL -"
+        const val VOLUME_UP = "VOLUME +"
+        const val VOLUME_DOWN = "VOLUME -"
+        const val MUTE = "MUTE"
+        const val GUIDE = "GUIDE"
+        const val INFO = "INFO"
+        const val AD_SUBTITLE = "AD/SUBT"
+        const val E_MANUAL = "E-MANUAL"
+        const val TOOLS = "TOOLS"
+        const val RETURN = "RETURN"
+        const val MENU = "MENU"
+        const val SMART_HUB = "SMART HUB"
+        const val EXIT = "EXIT"
+        const val CHANNEL_LIST = "CH LIST"
+        const val HOME = "HOME"
+        const val SETTINGS = "SETTINGS"
+        const val RED = "RED"
+        const val GREEN = "GREEN"
+        const val YELLOW = "YELLOW"
+        const val BLUE = "BLUE"
+        const val INPUT_SOURCE = "INPUT SOURCE"
+        const val REWIND = "REWIND"
+        const val PLAY = "PLAY"
+        const val PAUSE = "PAUSE"
+        const val FORWARD = "FORWARD"
+    }
+}

app/src/main/java/com/example/tvcontroller/services/DeviceService.kt

@@ -3,77 +3,115 @@ package com.example.tvcontroller.services
 import android.content.Context
 import android.content.Context.MODE_PRIVATE
 import android.util.Log
+import androidx.lifecycle.lifecycleScope
+import com.example.tvcontroller.client.WebClient
+import com.example.tvcontroller.client.WebsocketClient
 import com.example.tvcontroller.data.Integration
-import io.ktor.client.engine.cio.*
-import io.ktor.client.*
 import io.ktor.client.call.body
-import io.ktor.client.request.headers
-import io.ktor.client.request.request
-import io.ktor.client.request.setBody
-import io.ktor.client.statement.HttpResponse
-import io.ktor.http.HeadersBuilder
 import io.ktor.http.HttpMethod
+import kotlinx.coroutines.DelicateCoroutinesApi
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 import org.json.JSONObject
 
-private const val SHARED_PREFERENCES_NAME = "devices";
 
-class DeviceService(private val context: Context) {
+class DeviceService(
-    private var client = HttpClient(CIO)
+    private val context: Context,
-    private var serverAddress: String = ""
+    private val client: WebClient,
-    private var token: String = ""
+    private val websocketClient: WebsocketClient
+) {
+    var serverAddress: String = ""
+    var token: String = ""
+    var status: String = STATUS_UNREGISTERED
+        private set(status) {
+            field = status
+            statusChangedListeners.forEach { it(status) }
+        }
     private var deviceId: String = ""
+    private val statusChangedListeners = mutableListOf<(String) -> Unit>()
 
-    init {
+    suspend fun initialize() {
+        websocketClient.onConnected { status = STATUS_CONNECTED }
+        websocketClient.onDisconnected { status = STATUS_REGISTERED }
+        onStatusChanged {
+            when(it) {
+                STATUS_UNREGISTERED -> {
+                    token = ""
+                    deviceId = ""
+                    updateDefaultCookies()
+                    savePreferences()
+                }
+                STATUS_REGISTERED -> {
+                    Log.i(TAG, "Device registered with id $deviceId")
+                    savePreferences()
+                    connectWebsocket()
+                }
+            }
+        }
         loadPreferences()
-    }
+        if (token.isEmpty()) return
-
+        updateDefaultCookies()
-    suspend fun createIntegration(name: String, code: String) {
+        val integration = getIntegration()
-        Log.i("DeviceService", "Creating integration for $name with code $code at $serverAddress")
+        Log.i(TAG, "Integration: $integration")
-        val requestJson = JSONObject()
+        status = if (integration != null) {
-        requestJson.put("name", name)
+            STATUS_REGISTERED
-        requestJson.put("code", code)
+        } else {
-        try {
+            STATUS_UNREGISTERED
-            val response: HttpResponse = client.request("http://$serverAddress/api/integrations") {
-                method = HttpMethod.Post
-                setBody(requestJson.toString())
-                headers {
-                    append("Content-Type", "application/json")
         }
     }
 
-            val body: String = response.body()
+    private fun updateDefaultCookies() {
-            val responseJson = JSONObject(body)
+        Log.i(TAG, "Updating default cookies with token $token")
+        client.defaultCookies["token"] = token
+        Log.i(TAG, "Default cookies: ${client.defaultCookies}")
+    }
+
+    suspend fun registerIntegration(name: String, code: String) {
+        Log.i(TAG, "Registering integration for $name with code $code at $serverAddress")
+        savePreferences()
+        val requestJson = JSONObject().apply {
+            put("name", name)
+            put("code", code)
+        }
+        val response =
+            client.sendJsonRequest(
+                "http://$serverAddress/api/integrations/register",
+                HttpMethod.Post,
+                requestJson
+            ) ?: return
+
+        val responseJson = JSONObject(response.body<String>())
         if (response.status.value != 200) {
             val error = responseJson.getString("error")
-                Log.e("DeviceService", "Error getting integration: ${response.status.value} $error")
+            Log.e(TAG, "Error registering integration: ${response.status.value} $error")
             return
         }
         token = responseJson.getString("token")
         deviceId = responseJson.getString("id")
-            savePreferences()
+        status = STATUS_REGISTERED
+    }
 
-            Log.i("DeviceService", "Response: ${response.status.value} $body")
+    fun onStatusChanged(listener: (String) -> Unit) {
-        } catch (e: Exception) {
+        statusChangedListeners.add(listener)
-            Log.e("DeviceService", "Error creating integration", e)
+    }
+
+    @OptIn(DelicateCoroutinesApi::class)
+    fun connectWebsocket() {
+        GlobalScope.launch() {
+            websocketClient.connect(serverAddress, token)
         }
     }
 
     suspend fun getIntegration(): Integration? {
-        Log.i("DeviceService", "Getting integration $deviceId at $serverAddress")
+        val response =
-        try {
+            client.sendRequest("http://$serverAddress/api/integrations/$deviceId", HttpMethod.Get)
-            val response: HttpResponse =
+                ?: return null
-                client.request("http://$serverAddress/api/integrations/$deviceId") {
-                    method = HttpMethod.Get
-                    headers {
-                        append("Authorization", "Bearer $token")
-                    }
-                }
 
-            val body: String = response.body()
+        val responseJson = JSONObject(response.body<String>())
-            val responseJson = JSONObject(body)
         if (response.status.value != 200) {
             val error = responseJson.getString("error")
-                Log.e("DeviceService", "Error getting integration: ${response.status.value} $error")
+            Log.e(TAG, "Error getting integration: ${response.status.value} $error")
             return null
         }
         val integration = Integration(
@@ -81,40 +119,37 @@ class DeviceService(private val context: Context) {
             responseJson.getString("name")
         )
         return integration
-        } catch (e: Exception) {
-            Log.e("DeviceService", "Error getting integration", e)
-        }
-        return null
     }
 
     private fun loadPreferences() {
         val sharedPreferences = context.getSharedPreferences(SHARED_PREFERENCES_NAME, MODE_PRIVATE)
-        serverAddress = sharedPreferences.getString("server_address", "")!!
+        serverAddress = sharedPreferences.getString(SERVER_ADDRESS_KEY, "")!!
-        token = sharedPreferences.getString("token", "")!!
+        token = sharedPreferences.getString(TOKEN_KEY, "")!!
-        deviceId = sharedPreferences.getString("device_id", "")!!
+        deviceId = sharedPreferences.getString(DEVICE_ID_KEY, "")!!
-        Log.i("DeviceService", "Loaded preferences: $serverAddress $token")
+        Log.i(TAG, "Loaded preferences: $serverAddress $token")
     }
 
     private fun savePreferences() {
+        Log.i(TAG, "Saving preferences")
         val sharedPreferences = context.getSharedPreferences(SHARED_PREFERENCES_NAME, MODE_PRIVATE)
         val editor = sharedPreferences.edit()
         editor.apply {
-            putString("server_address", serverAddress)
+            putString(SERVER_ADDRESS_KEY, serverAddress)
-            putString("token", token)
+            putString(TOKEN_KEY, token)
-            putString("device_id", deviceId)
+            putString(DEVICE_ID_KEY, deviceId)
             apply()
         }
     }
 
-    fun setServerAddress(url: String) {
+    companion object {
-        serverAddress = url
+        const val STATUS_UNREGISTERED = "unregistered"
-    }
+        const val STATUS_REGISTERED = "registered"
+        const val STATUS_CONNECTED = "connected"
 
-    fun getServerAddress(): String {
+        private const val SHARED_PREFERENCES_NAME = "devices";
-        return serverAddress
+        private const val SERVER_ADDRESS_KEY = "server_address"
-    }
+        private const val TOKEN_KEY = "token"
-
+        private const val DEVICE_ID_KEY = "device_id"
-    fun getToken(): String {
+        private const val TAG = "DeviceService"
-        return token
     }
 }

app/src/main/java/com/example/tvcontroller/services/webrtc/RtcPeerConnection.kt

@@ -0,0 +1,175 @@
+package com.example.tvcontroller.services.webrtc
+
+import android.content.Context
+import android.util.Log
+import com.example.tvcontroller.services.CameraService
+import org.webrtc.AudioTrack
+import org.webrtc.DataChannel
+import org.webrtc.EglBase
+import org.webrtc.IceCandidate
+import org.webrtc.MediaConstraints
+import org.webrtc.MediaStream
+import org.webrtc.MediaStreamTrack
+import org.webrtc.PeerConnection
+import org.webrtc.PeerConnectionFactory
+import org.webrtc.PeerConnectionFactory.InitializationOptions
+import org.webrtc.SdpObserver
+import org.webrtc.SessionDescription
+import org.webrtc.SurfaceTextureHelper
+import org.webrtc.VideoSource
+import org.webrtc.VideoTrack
+import java.nio.ByteBuffer
+import java.nio.charset.StandardCharsets
+
+private const val TAG = "RtcPeerConnection"
+
+class RtcPeerConnection(private val context: Context, private val cameraService: CameraService) {
+    private val peerConnectionFactory by lazy { initializeFactory() }
+    private var iceServers = ArrayList<PeerConnection.IceServer>()
+    var eglBaseContext: EglBase.Context = cameraService.eglBaseContext
+    private val videoCapturer by lazy { cameraService.createCameraCapturer() }
+    private val surfaceTextureHelper by lazy { createSurfaceTextureHelper() }
+    private val videoSource by lazy { createVideoSource() }
+    private var peerConnection: PeerConnection? = null
+    private val iceCandidateHandlers = ArrayList<((IceCandidate) -> Unit)>()
+    private val dataChannelHandlers = ArrayList<((ByteBuffer) -> Unit)>()
+
+
+    fun initialize() {
+        var observer = object : PeerConnection.Observer {
+            override fun onSignalingChange(p0: PeerConnection.SignalingState?) {}
+            override fun onIceConnectionChange(p0: PeerConnection.IceConnectionState?) {}
+            override fun onIceConnectionReceivingChange(p0: Boolean) {}
+            override fun onIceGatheringChange(p0: PeerConnection.IceGatheringState?) {}
+            override fun onIceCandidate(iceCandidate: IceCandidate?) {
+                iceCandidateHandlers.forEach { it(iceCandidate!!) }
+            }
+
+            override fun onIceCandidatesRemoved(p0: Array<out IceCandidate?>?) {}
+            override fun onAddStream(p0: MediaStream?) {}
+            override fun onRemoveStream(p0: MediaStream?) {}
+            override fun onDataChannel(channel: DataChannel?) {
+                Log.i(TAG, "Data channel created: $channel")
+                channel?.registerObserver(object : DataChannel.Observer {
+                    override fun onBufferedAmountChange(p0: Long) { }
+                    override fun onStateChange() { }
+                    override fun onMessage(p0: DataChannel.Buffer?) {
+                        dataChannelHandlers.forEach { it(p0?.data!!) }
+                    }
+                })
+            }
+            override fun onRenegotiationNeeded() {}
+        }
+        var rtcConfig = PeerConnection.RTCConfiguration(iceServers)
+        peerConnection = peerConnectionFactory.createPeerConnection(rtcConfig, observer)
+    }
+
+    fun setIceServers(iceServerStrings: Array<String>) {
+        iceServers = ArrayList<PeerConnection.IceServer>()
+        iceServerStrings.forEach {
+            iceServers.add(
+                PeerConnection.IceServer.builder(it).createIceServer()
+            )
+        }
+    }
+
+    fun createAudioTrack(): AudioTrack {
+        val audioConstraints = MediaConstraints()
+        val audioSource = peerConnectionFactory.createAudioSource(audioConstraints)
+        val audioTrack = peerConnectionFactory.createAudioTrack("audio_track", audioSource)
+        return audioTrack
+    }
+
+    fun addTack(track: MediaStreamTrack) {
+        peerConnection?.addTrack(track)
+    }
+
+    fun createVideoTrack(): VideoTrack {
+        val videoTrack = peerConnectionFactory.createVideoTrack("video_track", videoSource)
+        return videoTrack
+    }
+
+    fun setLocalDescription(sessionDescription: SessionDescription, callback: () -> Unit) {
+        val onLocalDescriptionSet = object : SdpObserver {
+            override fun onSetSuccess() {
+                callback()
+            }
+
+            override fun onCreateSuccess(p0: SessionDescription?) {}
+            override fun onCreateFailure(p0: String?) {}
+            override fun onSetFailure(p0: String?) {}
+        }
+        peerConnection?.setLocalDescription(onLocalDescriptionSet, sessionDescription)
+    }
+
+    fun setRemoteDescription(sessionDescription: SessionDescription, callback: () -> Unit) {
+        val onRemoteDescriptionSet = object : SdpObserver {
+            override fun onSetSuccess() {
+                callback()
+            }
+
+            override fun onCreateSuccess(p0: SessionDescription?) {}
+            override fun onCreateFailure(p0: String?) {}
+            override fun onSetFailure(p0: String?) {}
+        }
+        peerConnection?.setRemoteDescription(onRemoteDescriptionSet, sessionDescription)
+    }
+
+    fun createAnswer(mediaConstraints: MediaConstraints, callback: (SessionDescription) -> Unit) {
+        val onAnswerCreated = object : SdpObserver {
+            override fun onCreateSuccess(sessionDescription: SessionDescription?) {
+                callback(sessionDescription!!)
+            }
+
+            override fun onSetSuccess() {}
+            override fun onCreateFailure(p0: String?) {}
+            override fun onSetFailure(p0: String?) {}
+        }
+        peerConnection?.createAnswer(onAnswerCreated, mediaConstraints)
+    }
+
+    fun addIceCandidate(iceCandidate: IceCandidate) {
+        Log.i(TAG, "Adding ice candidate $iceCandidate to $peerConnection")
+        peerConnection?.addIceCandidate(iceCandidate)
+    }
+
+    fun onIceCandidate(handler: (IceCandidate) -> Unit) {
+        iceCandidateHandlers.add(handler)
+    }
+
+    fun onDataChannelData(handler: (ByteBuffer) -> Unit) {
+        dataChannelHandlers.add(handler)
+    }
+
+    private fun initializeFactory(): PeerConnectionFactory {
+        val initOptions = InitializationOptions.builder(context).createInitializationOptions()
+        PeerConnectionFactory.initialize(initOptions)
+
+        val options = PeerConnectionFactory.Options()
+        val peerConnectionFactory =
+            PeerConnectionFactory.builder()
+                .setVideoDecoderFactory(cameraService.videoDecoderFactory)
+                .setVideoEncoderFactory(cameraService.videoEncoderFactory).setOptions(options)
+                .createPeerConnectionFactory()
+        return peerConnectionFactory
+    }
+
+    private fun createSurfaceTextureHelper(): SurfaceTextureHelper {
+        val surfaceTextureHelper =
+            SurfaceTextureHelper.create("SurfaceTextureHelperThread", eglBaseContext)
+        return surfaceTextureHelper
+    }
+
+    private fun createVideoSource(): VideoSource {
+        val videoSource = peerConnectionFactory.createVideoSource(false)
+        videoCapturer.initialize(surfaceTextureHelper, context, videoSource.capturerObserver)
+        videoCapturer.startCapture(1920, 1080, 30)
+        return videoSource
+    }
+
+    companion object {
+        const val TYPE_OFFER = "offer"
+        const val TYPE_ANSWER = "answer"
+        const val TYPE_ICE_CANDIDATE = "ice_candidate"
+    }
+}

app/src/main/java/com/example/tvcontroller/services/webrtc/WebRtcService.kt

@@ -0,0 +1,136 @@
+package com.example.tvcontroller.services.webrtc
+
+import android.content.Context
+import android.util.Log
+import com.example.tvcontroller.client.WebsocketClient
+import com.example.tvcontroller.services.CameraService
+import kotlinx.coroutines.runBlocking
+import org.json.JSONObject
+import org.webrtc.IceCandidate
+import org.webrtc.MediaConstraints
+import org.webrtc.SessionDescription
+import java.nio.ByteBuffer
+
+class WebRtcService(
+    private val context: Context,
+    private val websocketClient: WebsocketClient,
+    private val cameraService: CameraService
+) {
+    private val dataChannelHandlers = ArrayList<((ByteBuffer) -> Unit)>()
+    private var rtcPeerConnection: RtcPeerConnection = createRtcPeerConnection()
+    val videoTrack by lazy { rtcPeerConnection.createVideoTrack() }
+    val audioTrack by lazy { rtcPeerConnection.createAudioTrack() }
+    private var peerId: String = ""
+
+    fun connect() {
+        Log.i(TAG, "Connecting to signaling server")
+        websocketClient.onData(this::handleData)
+    }
+
+    fun onDataChannelData(handler: (ByteBuffer) -> Unit) {
+        dataChannelHandlers.add(handler)
+    }
+
+    private fun createRtcPeerConnection(): RtcPeerConnection {
+        val iceServers = arrayOf("stun:stun.l.google.com:19302")
+        val webRtcService = this
+        val rtcPeerConnection = RtcPeerConnection(context, cameraService).apply {
+            setIceServers(iceServers)
+            onIceCandidate(webRtcService::sendIceCandidate)
+            initialize()
+        }
+        dataChannelHandlers.forEach { rtcPeerConnection.onDataChannelData(it) }
+        return rtcPeerConnection
+    }
+
+    private fun handleOffer(sdp: String) {
+        rtcPeerConnection = createRtcPeerConnection()
+        var mediaConstraints = MediaConstraints()
+        val remoteSessionDescription = SessionDescription(SessionDescription.Type.OFFER, sdp)
+        rtcPeerConnection.apply {
+            addTack(audioTrack)
+            addTack(videoTrack)
+            setRemoteDescription(remoteSessionDescription) {
+                createAnswer(mediaConstraints) { localSessionDescription ->
+                    setLocalDescription(localSessionDescription) {
+                        sendAnswer(
+                            peerId, localSessionDescription.description ?: ""
+                        )
+                    }
+                }
+            }
+        }
+    }
+
+    private fun handleData(data: String) {
+        Log.d(TAG, "Received data: $data")
+        val dataJson = JSONObject(data)
+        val senderId = dataJson.getString("sender")
+        val message = dataJson.getJSONObject("message")
+        val type = message.getString("type")
+        when (type) {
+            RtcPeerConnection.TYPE_OFFER -> {
+                Log.i(TAG, "Received offer from $senderId")
+                val sdp = message.getString("sdp")
+                peerId = senderId
+                handleOffer(sdp)
+            }
+
+            RtcPeerConnection.TYPE_ICE_CANDIDATE -> {
+                val candidateString = message.getString("candidate")
+                handleReceiveIceCandidate(candidateString)
+            }
+        }
+    }
+
+    private fun handleReceiveIceCandidate(candidateString: String) {
+        Log.i(TAG, "Received ice candidate")
+        val candidateJson = JSONObject(candidateString)
+        val sdpMid = candidateJson.getString("sdpMid")
+        val sdpMLineIndex = candidateJson.getInt("sdpMLineIndex")
+        val sdp = candidateJson.getString("candidate")
+        val candidate = IceCandidate(sdpMid, sdpMLineIndex, sdp)
+        Log.i(TAG, "Candidate: $candidate")
+        rtcPeerConnection.addIceCandidate(candidate)
+    }
+
+    private fun sendIceCandidate(iceCandidate: IceCandidate) {
+        val messageJson = JSONObject()
+        messageJson.put("type", TYPE_SIGNALING)
+        messageJson.put("target", peerId)
+        messageJson.put("message", JSONObject().apply {
+            put("candidate", JSONObject().apply {
+                put("sdpMid", iceCandidate.sdpMid)
+                put("sdpMLineIndex", iceCandidate.sdpMLineIndex)
+                put("candidate", iceCandidate.sdp)
+            })
+            put("type", RtcPeerConnection.TYPE_ICE_CANDIDATE)
+        })
+
+        runBlocking {
+            Log.i(TAG, "Sending ice candidate")
+            websocketClient.sendJson(messageJson)
+        }
+    }
+
+    private fun sendAnswer(targetId: String, sdp: String) {
+        val messageJson = JSONObject()
+        messageJson.put("type", TYPE_SIGNALING)
+        messageJson.put("target", targetId)
+        messageJson.put("message", JSONObject().apply {
+            put("sdp", sdp)
+            put("type", RtcPeerConnection.TYPE_ANSWER)
+        })
+
+        runBlocking {
+            Log.i(TAG, "Sending answer")
+            websocketClient.sendJson(messageJson)
+        }
+    }
+
+    companion object {
+        const val TYPE_SIGNALING = "signaling"
+
+        private const val TAG = "WebRtcService"
+    }
+}

app/src/main/java/com/example/tvcontroller/ui/AppUiState.kt

@@ -1,7 +0,0 @@
-package com.example.tvcontroller.ui
-
-import com.example.tvcontroller.Screen
-
-data class AppUiState(
-    val currentScreen: Screen = Screen.Settings,
-)

app/src/main/java/com/example/tvcontroller/ui/AppViewModel.kt

@@ -1,16 +0,0 @@
-package com.example.tvcontroller.ui
-
-import androidx.compose.runtime.mutableStateOf
-import androidx.lifecycle.ViewModel
-
-class AppViewModel() : ViewModel() {
-    private var isBluetoothEnabled = mutableStateOf(false)
-
-    fun setBluetoothEnabled(enabled: Boolean) {
-        isBluetoothEnabled.value = enabled
-    }
-
-    fun isBluetoothEnabled(): Boolean {
-        return isBluetoothEnabled.value
-    }
-}

app/src/main/java/com/example/tvcontroller/ui/components/CameraPreview.kt

@@ -0,0 +1,64 @@
+package com.example.tvcontroller.ui.components
+
+import androidx.camera.view.LifecycleCameraController
+import androidx.camera.view.PreviewView
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.viewinterop.AndroidView
+import org.webrtc.EglBase
+import org.webrtc.RendererCommon
+import org.webrtc.VideoTrack
+
+@Composable
+fun CameraPreview(
+    eglBaseContext: EglBase.Context, videoTrack: VideoTrack, modifier: Modifier = Modifier
+) {
+    val trackState: MutableState<VideoTrack?> = remember { mutableStateOf(null) }
+    var view: VideoTextureViewRenderer? by remember { mutableStateOf(null) }
+
+    AndroidView(
+        factory = {
+            VideoTextureViewRenderer(it).apply {
+                init(
+                    eglBaseContext,
+                    object : RendererCommon.RendererEvents {
+                        override fun onFirstFrameRendered() = Unit
+                        override fun onFrameResolutionChanged(p0: Int, p1: Int, p2: Int) = Unit
+                    }
+                )
+                setupVideo(trackState, videoTrack, this)
+                view = this
+            }
+        },
+        update = { v -> setupVideo(trackState, videoTrack, v) },
+        modifier = modifier
+    )
+}
+
+private fun cleanTrack(
+    view: VideoTextureViewRenderer?,
+    trackState: MutableState<VideoTrack?>
+) {
+    view?.let { trackState.value?.removeSink(it) }
+    trackState.value = null
+}
+
+private fun setupVideo(
+    trackState: MutableState<VideoTrack?>,
+    track: VideoTrack,
+    renderer: VideoTextureViewRenderer
+) {
+    if (trackState.value == track) {
+        return
+    }
+
+    cleanTrack(renderer, trackState)
+
+    trackState.value = track
+    track.addSink(renderer)
+}

app/src/main/java/com/example/tvcontroller/ui/components/RemoteButton.kt

@@ -0,0 +1,44 @@
+package com.example.tvcontroller.ui.components
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.painter.Painter
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun RemoteButton(
+    modifier: Modifier = Modifier,
+    text: String? = "",
+    onClick: () -> Unit,
+    icon: Painter? = null,
+    width: Dp = 64.dp,
+) {
+    Box(
+        contentAlignment = Alignment.Center,
+        modifier = Modifier
+            .width(width)
+            .clip(RoundedCornerShape(12.dp))
+            .background(MaterialTheme.colorScheme.surfaceVariant)
+            .clickable(onClick = onClick)
+            .then(modifier)
+    ) {
+        if (!text.isNullOrBlank()) Text(text = text)
+        if (icon != null) {
+            Icon(
+                icon,
+                contentDescription = "Settings"
+            )
+        }
+    }
+}

app/src/main/java/com/example/tvcontroller/ui/components/RemoteButtonPlaceholder.kt

@@ -0,0 +1,18 @@
+package com.example.tvcontroller.ui.components
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.width
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun RemoteButtonPlaceholder(
+    modifier: Modifier = Modifier,
+) {
+    Box(
+        modifier = Modifier
+            .width(64.dp)
+            .then(modifier)
+    ) {}
+}

app/src/main/java/com/example/tvcontroller/ui/components/VideoTextureViewRenderer.kt

@@ -0,0 +1,191 @@
+package com.example.tvcontroller.ui.components
+/*
+ * Copyright 2023 Stream.IO, Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+import android.content.Context
+import android.content.res.Resources
+import android.graphics.SurfaceTexture
+import android.os.Handler
+import android.os.Looper
+import android.util.AttributeSet
+import android.view.TextureView
+import android.view.TextureView.SurfaceTextureListener
+import org.webrtc.EglBase
+import org.webrtc.EglRenderer
+import org.webrtc.GlRectDrawer
+import org.webrtc.RendererCommon.RendererEvents
+import org.webrtc.ThreadUtils
+import org.webrtc.VideoFrame
+import org.webrtc.VideoSink
+import java.util.concurrent.CountDownLatch
+
+/**
+ * Custom [TextureView] used to render local/incoming videos on the screen.
+ */
+open class VideoTextureViewRenderer @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null
+) : TextureView(context, attrs), VideoSink, SurfaceTextureListener {
+
+    /**
+     * Cached resource name.
+     */
+    private val resourceName: String = getResourceName()
+
+    /**
+     * Renderer used to render the video.
+     */
+    private val eglRenderer: EglRenderer = EglRenderer(resourceName)
+
+    /**
+     * Callback used for reporting render events.
+     */
+    private var rendererEvents: RendererEvents? = null
+
+    /**
+     * Handler to access the UI thread.
+     */
+    private val uiThreadHandler = Handler(Looper.getMainLooper())
+
+    /**
+     * Whether the first frame has been rendered or not.
+     */
+    private var isFirstFrameRendered = false
+
+    /**
+     * The rotated [VideoFrame] width.
+     */
+    private var rotatedFrameWidth = 0
+
+    /**
+     * The rotated [VideoFrame] height.
+     */
+    private var rotatedFrameHeight = 0
+
+    /**
+     * The rotated [VideoFrame] rotation.
+     */
+    private var frameRotation = 0
+
+    init {
+        surfaceTextureListener = this
+    }
+
+    /**
+     * Called when a new frame is received. Sends the frame to be rendered.
+     *
+     * @param videoFrame The [VideoFrame] received from WebRTC connection to draw on the screen.
+     */
+    override fun onFrame(videoFrame: VideoFrame) {
+        eglRenderer.onFrame(videoFrame)
+        updateFrameData(videoFrame)
+    }
+
+    /**
+     * Updates the frame data and notifies [rendererEvents] about the changes.
+     */
+    private fun updateFrameData(videoFrame: VideoFrame) {
+        if (isFirstFrameRendered) {
+            rendererEvents?.onFirstFrameRendered()
+            isFirstFrameRendered = true
+        }
+
+        if (videoFrame.rotatedWidth != rotatedFrameWidth ||
+            videoFrame.rotatedHeight != rotatedFrameHeight ||
+            videoFrame.rotation != frameRotation
+        ) {
+            rotatedFrameWidth = videoFrame.rotatedWidth
+            rotatedFrameHeight = videoFrame.rotatedHeight
+            frameRotation = videoFrame.rotation
+
+            uiThreadHandler.post {
+                rendererEvents?.onFrameResolutionChanged(
+                    rotatedFrameWidth,
+                    rotatedFrameHeight,
+                    frameRotation
+                )
+            }
+        }
+    }
+
+    /**
+     * After the view is laid out we need to set the correct layout aspect ratio to the renderer so that the image
+     * is scaled correctly.
+     */
+    override fun onLayout(changed: Boolean, left: Int, top: Int, right: Int, bottom: Int) {
+        eglRenderer.setLayoutAspectRatio((right - left) / (bottom.toFloat() - top))
+    }
+
+    /**
+     * Initialise the renderer. Should be called from the main thread.
+     *
+     * @param sharedContext [EglBase.Context]
+     * @param rendererEvents Sets the render event listener.
+     */
+    fun init(
+        sharedContext: EglBase.Context,
+        rendererEvents: RendererEvents
+    ) {
+        ThreadUtils.checkIsOnMainThread()
+        this.rendererEvents = rendererEvents
+        eglRenderer.init(sharedContext, EglBase.CONFIG_PLAIN, GlRectDrawer())
+    }
+
+    /**
+     * [SurfaceTextureListener] callback that lets us know when a surface texture is ready and we can draw on it.
+     */
+    override fun onSurfaceTextureAvailable(
+        surfaceTexture: SurfaceTexture,
+        width: Int,
+        height: Int
+    ) {
+        eglRenderer.createEglSurface(surfaceTexture)
+    }
+
+    /**
+     * [SurfaceTextureListener] callback that lets us know when a surface texture is destroyed we need to stop drawing
+     * on it.
+     */
+    override fun onSurfaceTextureDestroyed(surfaceTexture: SurfaceTexture): Boolean {
+        val completionLatch = CountDownLatch(1)
+        eglRenderer.releaseEglSurface { completionLatch.countDown() }
+        ThreadUtils.awaitUninterruptibly(completionLatch)
+        return true
+    }
+
+    override fun onSurfaceTextureSizeChanged(
+        surfaceTexture: SurfaceTexture,
+        width: Int,
+        height: Int
+    ) {
+    }
+
+    override fun onSurfaceTextureUpdated(surfaceTexture: SurfaceTexture) {}
+
+    override fun onDetachedFromWindow() {
+        eglRenderer.release()
+        super.onDetachedFromWindow()
+    }
+
+    private fun getResourceName(): String {
+        return try {
+            resources.getResourceEntryName(id) + ": "
+        } catch (e: Resources.NotFoundException) {
+            ""
+        }
+    }
+}

app/src/main/java/com/example/tvcontroller/ui/views/CameraView.kt

@@ -0,0 +1,34 @@
+package com.example.tvcontroller.ui.views
+
+import android.content.res.Configuration
+import android.util.Log
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.aspectRatio
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalConfiguration
+import androidx.compose.ui.unit.dp
+import com.example.tvcontroller.ui.components.CameraPreview
+import org.webrtc.EglBase
+import org.webrtc.VideoTrack
+
+@Composable
+fun CameraView(eglBaseContext: EglBase.Context, videoTrack: VideoTrack) {
+    val configuration = LocalConfiguration.current
+    val isLandscape = configuration.orientation == Configuration.ORIENTATION_LANDSCAPE
+    var ratio = if (isLandscape) 16/9f else 9/16f
+    Box(
+        modifier = Modifier
+            .fillMaxSize(),
+        contentAlignment = Alignment.Center
+    ) {
+        Box(modifier = if (isLandscape) Modifier.aspectRatio(ratio).fillMaxHeight() else Modifier.aspectRatio(ratio).fillMaxWidth()) {
+            CameraPreview(eglBaseContext = eglBaseContext, videoTrack = videoTrack, modifier = Modifier.fillMaxSize())
+        }
+    }
+}

app/src/main/java/com/example/tvcontroller/ui/views/MainView.kt

@@ -0,0 +1,152 @@
+package com.example.tvcontroller.ui.views
+
+import android.content.res.Configuration
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.material3.Icon
+import androidx.compose.material3.NavigationBar
+import androidx.compose.material3.NavigationBarItem
+import androidx.compose.material3.NavigationRail
+import androidx.compose.material3.NavigationRailItem
+import androidx.compose.material3.Scaffold
+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.platform.LocalConfiguration
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.composable
+import androidx.navigation.compose.currentBackStackEntryAsState
+import androidx.navigation.compose.rememberNavController
+import com.example.tvcontroller.R
+import com.example.tvcontroller.services.BluetoothService
+import com.example.tvcontroller.services.CameraService
+import com.example.tvcontroller.services.ControllerService
+import com.example.tvcontroller.services.DeviceService
+import com.example.tvcontroller.services.webrtc.WebRtcService
+import com.example.tvcontroller.ui.views.MainViewModel.Companion.CAMERA_VIEW
+import com.example.tvcontroller.ui.views.MainViewModel.Companion.REMOTE_VIEW
+import com.example.tvcontroller.ui.views.MainViewModel.Companion.SETTINGS_VIEW
+
+private data class NavigationItem(
+    var onClick: () -> Unit = {},
+    var icon: @Composable () -> Unit = {},
+    var label: @Composable () -> Unit = {},
+    var selected: Boolean = false
+)
+
+@Composable
+fun MainView(
+    deviceService: DeviceService,
+    controllerService: ControllerService,
+    bluetoothService: BluetoothService,
+    webRtcService: WebRtcService,
+    cameraService: CameraService
+) {
+    val viewModel = viewModel<MainViewModel>()
+    val navController = rememberNavController()
+    val backStackEntry by navController.currentBackStackEntryAsState()
+    val currentView = backStackEntry?.destination?.route
+    val baselineCamera24 = painterResource(R.drawable.baseline_camera_24)
+    val baselineRemote24 = painterResource(R.drawable.baseline_settings_remote_24)
+    val baselineSettings24 = painterResource(R.drawable.baseline_settings_24)
+    val configuration = LocalConfiguration.current
+    val isLandscape = configuration.orientation == Configuration.ORIENTATION_LANDSCAPE
+
+    val navigationItems = listOf(
+        NavigationItem(
+            onClick = { navController.navigate(CAMERA_VIEW) },
+            icon = { Icon(baselineCamera24, contentDescription = "Camera") },
+            label = { Text("Camera") },
+            selected = currentView == CAMERA_VIEW
+        ), NavigationItem(
+            onClick = { navController.navigate(REMOTE_VIEW) },
+            icon = { Icon(baselineRemote24, contentDescription = "Remote") },
+            label = { Text("Remote") },
+            selected = currentView == REMOTE_VIEW
+        ), NavigationItem(
+            onClick = { navController.navigate(SETTINGS_VIEW) },
+            icon = { Icon(baselineSettings24, contentDescription = "Settings") },
+            label = { Text("Settings") },
+            selected = currentView == SETTINGS_VIEW
+        )
+    )
+    Surface(modifier = Modifier.fillMaxSize()) {
+        Scaffold(
+            modifier = Modifier
+                .fillMaxHeight(),
+            bottomBar = {
+                if (!isLandscape) {
+                    NavigationBar {
+                        navigationItems.forEach { item ->
+                            NavigationBarItem(
+                                onClick = item.onClick,
+                                icon = item.icon,
+                                label = item.label,
+                                selected = item.selected,
+                            )
+                        }
+                    }
+                }
+            }) { innerPadding ->
+            Row(Modifier.padding(innerPadding)) {
+                if (isLandscape) {
+                    NavigationRail(
+                        modifier = Modifier
+                            .fillMaxHeight()
+                            .width(64.dp)
+                    ) {
+                        Column(
+                            modifier = Modifier
+                                .fillMaxHeight(),
+                            verticalArrangement = Arrangement.spacedBy(
+                                12.dp, Alignment.CenterVertically
+                            )
+                        ) {
+                            navigationItems.forEach { item ->
+                                NavigationRailItem(
+                                    onClick = item.onClick,
+                                    icon = item.icon,
+                                    label = item.label,
+                                    selected = item.selected,
+                                )
+                            }
+                        }
+                    }
+                }
+                NavHost(
+                    navController = navController,
+                    startDestination = viewModel.currentView.value,
+                ) {
+                    composable(route = CAMERA_VIEW) {
+                        CameraView(
+                            eglBaseContext = cameraService.eglBaseContext,
+                            videoTrack = webRtcService.videoTrack
+                        )
+                    }
+                    composable(route = REMOTE_VIEW) {
+                        RemoteView(
+                            controllerService = controllerService
+                        )
+                    }
+                    composable(route = SETTINGS_VIEW) {
+                        SettingsView(
+                            deviceService = deviceService, bluetoothService = bluetoothService
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
+

app/src/main/java/com/example/tvcontroller/ui/views/MainViewModel.kt

@@ -0,0 +1,14 @@
+package com.example.tvcontroller.ui.views
+
+import androidx.compose.runtime.mutableStateOf
+import androidx.lifecycle.ViewModel
+
+class MainViewModel : ViewModel() {
+    var currentView = mutableStateOf(CAMERA_VIEW)
+
+    companion object {
+        const val CAMERA_VIEW = "camera_view"
+        const val REMOTE_VIEW = "remote_view"
+        const val SETTINGS_VIEW = "settings_view"
+    }
+}

app/src/main/java/com/example/tvcontroller/ui/views/RemoteView.kt

@@ -0,0 +1,269 @@
+package com.example.tvcontroller.ui.views
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.aspectRatio
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.runtime.Composable
+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.res.painterResource
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.example.tvcontroller.R
+import com.example.tvcontroller.services.ControllerService
+import com.example.tvcontroller.ui.components.RemoteButton
+import com.example.tvcontroller.ui.components.RemoteButtonPlaceholder
+
+@Composable
+fun RemoteView(modifier: Modifier = Modifier, controllerService: ControllerService) {
+    val viewModel = viewModel<RemoteViewModel>(
+        factory = RemoteViewModel.provideFactory(
+            controllerService
+        )
+    )
+
+    Column(
+        modifier = modifier
+            .fillMaxSize(),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center
+    ) {
+        Column(
+            verticalArrangement = Arrangement.spacedBy(8.dp),
+            horizontalAlignment = Alignment.CenterHorizontally,
+        ) {
+
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.POWER) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_power_settings_new_24)
+                )
+                RemoteButtonPlaceholder()
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.INPUT_SOURCE) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_login_24)
+                )
+            }
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.ONE) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    text = "1"
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.TWO) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    text = "2"
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.THREE) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    text = "3"
+                )
+            }
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.FOUR) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    text = "4"
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.FIVE) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    text = "5"
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.SIX) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    text = "6"
+                )
+            }
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.SEVEN) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    text = "7"
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.EIGHT) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    text = "8"
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.NINE) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    text = "9"
+                )
+            }
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.VOLUME_UP) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon=painterResource(R.drawable.baseline_volume_up_24)
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.ZERO) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    text = "0"
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.CHANNEL_UP) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_keyboard_arrow_up_24)
+                )
+            }
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.VOLUME_DOWN) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon=painterResource(R.drawable.baseline_volume_down_24)
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.MUTE) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_volume_off_24)
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.CHANNEL_DOWN) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_keyboard_arrow_down_24)
+                )
+            }
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.MENU) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    text = "MENU"
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.HOME) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_home_24)
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.SETTINGS) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_settings_24)
+                )
+            }
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.CHANNEL_LIST) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_list_alt_24)
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.CURSOR_UP) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_arrow_upward_24)
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.INFO) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_info_24)
+                )
+            }
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.CURSOR_LEFT) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_arrow_back_24)
+                )
+                RemoteButton(
+                    text = "OK",
+                    onClick = { viewModel.sendCommand(ControllerService.ENTER) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.CURSOR_RIGHT) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_arrow_forward_24)
+                )
+            }
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.RETURN) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_keyboard_return_24)
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.CURSOR_DOWN) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    icon = painterResource(id = R.drawable.baseline_arrow_downward_24)
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.EXIT) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    text = "EXIT"
+                )
+            }
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                val width = 46.dp
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.RED) },
+                    modifier = Modifier.aspectRatio(1.5f).background(color = Color.Red).clip(
+                        RoundedCornerShape(12.dp)
+                    ),
+                    width = width,
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.GREEN) },
+                    modifier = Modifier.aspectRatio(1.5f).background(color = Color.Green).clip(
+                        RoundedCornerShape(12.dp)
+                    ),
+                    width = width,
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.YELLOW) },
+                    modifier = Modifier.aspectRatio(1.5f).background(color = Color.Yellow).clip(
+                        RoundedCornerShape(12.dp)
+                    ),
+                    width = width,
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.BLUE) },
+                    modifier = Modifier.aspectRatio(1.5f).background(color = Color.Blue).clip(
+                        RoundedCornerShape(12.dp)
+                    ),
+                    width = width,
+                )
+            }
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                val width = 46.dp
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.REWIND) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    width = width,
+                    icon = painterResource(id = R.drawable.baseline_fast_rewind_24)
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.PLAY) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    width = width,
+                    icon = painterResource(id = R.drawable.baseline_play_arrow_24)
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.PAUSE) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    width = width,
+                    icon = painterResource(id = R.drawable.baseline_pause_24)
+                )
+                RemoteButton(
+                    onClick = { viewModel.sendCommand(ControllerService.FORWARD) },
+                    modifier = Modifier.aspectRatio(1.5f),
+                    width = width,
+                    icon = painterResource(id = R.drawable.baseline_fast_forward_24)
+                )
+            }
+        }
+    }
+}

app/src/main/java/com/example/tvcontroller/ui/views/RemoteViewModel.kt

@@ -0,0 +1,35 @@
+package com.example.tvcontroller.ui.views
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewModelScope
+import com.example.tvcontroller.data.RemoteCommand
+import com.example.tvcontroller.services.BluetoothService
+import com.example.tvcontroller.services.ControllerService
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import org.json.JSONObject
+
+class RemoteViewModel(
+    private val controllerService: ControllerService
+) : ViewModel() {
+    private val commands = mutableMapOf<String, RemoteCommand>()
+
+    fun sendCommand(commandType: String) {
+        val command = commands[commandType]?: return
+        viewModelScope.launch(Dispatchers.IO) {
+            controllerService.sendCommand(command)
+        }
+    }
+
+    companion object {
+        fun provideFactory(
+            controllerService: ControllerService
+        ) = object : ViewModelProvider.Factory {
+            @Suppress("UNCHECKED_CAST")
+            override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                return RemoteViewModel(controllerService) as T
+            }
+        }
+    }
+}

app/src/main/java/com/example/tvcontroller/ui/views/SettingsView.kt

@@ -0,0 +1,197 @@
+package com.example.tvcontroller.ui.views
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.ListItem
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.composable
+import androidx.navigation.compose.rememberNavController
+import com.example.tvcontroller.R
+import com.example.tvcontroller.services.BluetoothService
+import com.example.tvcontroller.services.DeviceService
+import com.example.tvcontroller.ui.views.SettingsViewModel.Companion.CONNECT_CONTROLLER_VIEW
+import com.example.tvcontroller.ui.views.SettingsViewModel.Companion.MAIN_SETTINGS_VIEW
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun SettingsView(
+    deviceService: DeviceService,
+    bluetoothService: BluetoothService
+) {
+    val viewModel = viewModel<SettingsViewModel>(
+        factory = SettingsViewModel.provideFactory(
+            deviceService, bluetoothService
+        )
+    )
+    val navController = rememberNavController()
+
+    @Composable
+    fun MainSettingsView() {
+        Column(
+            modifier = Modifier
+                .padding(16.dp, 16.dp)
+                .verticalScroll(rememberScrollState()),
+            verticalArrangement = Arrangement.spacedBy(8.dp)
+        ) {
+            Text(
+                text = stringResource(id = R.string.settings_title),
+                style = MaterialTheme.typography.displaySmall
+            )
+            Spacer(modifier = Modifier.padding(8.dp))
+            Text(
+                text = stringResource(id = R.string.server_settings_heading),
+                style = MaterialTheme.typography.headlineSmall
+            )
+            Text(
+                text = stringResource(id = R.string.server_connection_label) + ": " + getConnectionStateString(
+                    viewModel.connectionState
+                ), style = MaterialTheme.typography.bodyMedium
+            )
+            OutlinedTextField(
+                modifier = Modifier.fillMaxWidth(),
+                value = viewModel.serverAddress,
+                onValueChange = viewModel::onServerAddressChanged,
+                label = { Text(stringResource(id = R.string.server_address_label)) })
+            OutlinedTextField(
+                modifier = Modifier.fillMaxWidth(),
+                value = viewModel.deviceName,
+                onValueChange = viewModel::onDeviceNameChanged,
+                label = { Text(stringResource(id = R.string.device_name_label)) })
+            OutlinedTextField(
+                modifier = Modifier.fillMaxWidth(),
+                value = viewModel.registrationCode,
+                onValueChange = viewModel::onRegistrationCodeChanged,
+                label = { Text(stringResource(id = R.string.registration_code_label)) })
+            OutlinedButton(onClick = { viewModel.connect() }, modifier = Modifier.fillMaxWidth()) {
+                Text(
+                    stringResource(id = R.string.connect_button_label)
+                )
+            }
+            Spacer(modifier = Modifier.padding(8.dp))
+            Text(
+                text = stringResource(id = R.string.controller_settings_heading),
+                style = MaterialTheme.typography.headlineSmall
+            )
+            Text(
+                text = "Controller status: " + getBluetoothConnectionStateString(viewModel.bluetoothConnectionState) + ".",
+                style = MaterialTheme.typography.bodyMedium
+            )
+            if (viewModel.bluetoothConnectionState == BluetoothService.STATE_CONNECTED) OutlinedButton(
+                onClick = viewModel::disconnectBluetoothDevice, modifier = Modifier.fillMaxWidth()
+            ) {
+                Text(
+                    stringResource(id = R.string.disconnect_button_label)
+                )
+            }
+            else OutlinedButton(
+                onClick = { navController.navigate(CONNECT_CONTROLLER_VIEW.toString()) },
+                enabled = viewModel.bluetoothConnectionState != BluetoothService.STATE_OFF,
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                Text(
+                    stringResource(id = R.string.connect_button_label)
+                )
+            }
+        }
+    }
+
+    @Composable
+    fun ConnectControllerView() {
+        val pairedDevices = viewModel.pairedDevices.collectAsState()
+        Column {
+            TopAppBar(
+                title = { Text(text = stringResource(id = R.string.connect_controller_title)) },
+                navigationIcon = {
+                    IconButton(onClick = {
+                        navController.navigate(MAIN_SETTINGS_VIEW.toString())
+                    }) {
+                        Icon(
+                            painterResource(id = R.drawable.baseline_arrow_back_24),
+                            contentDescription = "Back"
+                        )
+                    }
+                },
+            )
+            Column(
+                modifier = Modifier.verticalScroll(rememberScrollState()),
+            ) {
+                Text(
+                    text = stringResource(id = R.string.paired_devices_label),
+                    style = MaterialTheme.typography.headlineSmall,
+                    modifier = Modifier.padding(start = 16.dp)
+                )
+                pairedDevices.value.forEach { device ->
+                    if (device == null) return
+                    ListItem(headlineContent = { Text(device.getName()) }, supportingContent = {
+                        if (device.getName() != device.getAddress()) Text(
+                            device.getAddress()
+                        )
+                    }, modifier = Modifier.clickable(onClick = {
+                        viewModel.connectBluetoothDevice(
+                            device
+                        )
+                    }), trailingContent = {
+                        if (device == viewModel.currentBluetoothDevice) if (viewModel.bluetoothConnectionState == BluetoothService.STATE_CONNECTED) Icon(
+                            painterResource(id = R.drawable.baseline_check_24),
+                            contentDescription = "state"
+                        )
+                        else CircularProgressIndicator(
+                            modifier = Modifier.width(16.dp),
+                            color = MaterialTheme.colorScheme.secondary,
+                            trackColor = MaterialTheme.colorScheme.surfaceVariant,
+                        )
+                    })
+                }
+            }
+        }
+    }
+
+    NavHost(navController = navController, startDestination = MAIN_SETTINGS_VIEW.toString()) {
+        composable(route = MAIN_SETTINGS_VIEW.toString()) { MainSettingsView() }
+        composable(route = CONNECT_CONTROLLER_VIEW.toString()) { ConnectControllerView() }
+    }
+}
+
+@Composable
+fun getConnectionStateString(state: String): String {
+    return when (state) {
+        DeviceService.STATUS_UNREGISTERED -> stringResource(id = R.string.connection_state_unregistered)
+        DeviceService.STATUS_REGISTERED -> stringResource(id = R.string.connection_state_registered)
+        DeviceService.STATUS_CONNECTED -> stringResource(id = R.string.connection_state_connected)
+        else -> "Unknown"
+    }
+}
+
+@Composable
+fun getBluetoothConnectionStateString(state: String): String {
+    return when (state) {
+        BluetoothService.STATE_OFF -> stringResource(id = R.string.controller_state_bluetooth_disabled)
+        BluetoothService.STATE_DISCONNECTED -> stringResource(id = R.string.bluetooth_state_disconnected)
+        BluetoothService.STATE_CONNECTING -> stringResource(id = R.string.bluetooth_state_connecting)
+        BluetoothService.STATE_CONNECTED -> stringResource(id = R.string.bluetooth_state_connected)
+        else -> "Unknown"
+    }
+}

app/src/main/java/com/example/tvcontroller/ui/views/SettingsViewModel.kt

@@ -0,0 +1,110 @@
+package com.example.tvcontroller.ui.views
+
+import android.os.Build
+import android.util.Log
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewModelScope
+import com.example.tvcontroller.data.BluetoothDevice
+import com.example.tvcontroller.services.BluetoothService
+import com.example.tvcontroller.services.DeviceService
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+
+private const val TAG = "SettingsViewModel"
+
+class SettingsViewModel(
+    private val deviceService: DeviceService,
+    private val bluetoothService: BluetoothService
+) : ViewModel() {
+    var serverAddress by mutableStateOf(deviceService.serverAddress)
+        private set
+    var deviceName by mutableStateOf(Build.MANUFACTURER + " " + Build.MODEL)
+        private set
+    var registrationCode by mutableStateOf("")
+        private set
+    var connectionState by mutableStateOf(deviceService.status)
+        private set
+    var bluetoothConnectionState by mutableStateOf(bluetoothService.state)
+        private set
+    var currentBluetoothDevice by mutableStateOf<BluetoothDevice?>(bluetoothService.currentDevice)
+        private set
+
+    var pairedDevices = bluetoothService.pairedDevices
+
+    init {
+        updateConnectionState()
+        viewModelScope.launch {
+            updateDeviceInfo()
+        }
+        bluetoothService.onBluetoothStateChanged {
+            currentBluetoothDevice = bluetoothService.currentDevice
+            bluetoothConnectionState = it
+        }
+        deviceService.onStatusChanged { connectionState = it }
+    }
+
+    fun connect() {
+        viewModelScope.launch {
+            deviceService.serverAddress = serverAddress
+            deviceService.registerIntegration(deviceName, registrationCode)
+            updateConnectionState()
+            updateDeviceInfo()
+        }
+    }
+
+    private fun updateConnectionState() {
+        Log.i(TAG, "Device token: ${deviceService.token}")
+        connectionState = deviceService.status
+    }
+
+    private suspend fun updateDeviceInfo() {
+        if (connectionState == DeviceService.STATUS_UNREGISTERED) return
+        val integration = deviceService.getIntegration()
+        integration?.let {
+            deviceName = it.name
+        }
+    }
+
+    fun connectBluetoothDevice(device: BluetoothDevice) {
+        viewModelScope.launch(Dispatchers.IO) {
+            bluetoothService.connectToDevice(device)
+        }
+    }
+
+    fun disconnectBluetoothDevice() {
+        viewModelScope.launch(Dispatchers.IO) {
+            bluetoothService.closeBluetoothConnection()
+        }
+    }
+
+    fun onServerAddressChanged(url: String) {
+        serverAddress = url
+    }
+
+    fun onDeviceNameChanged(name: String) {
+        deviceName = name
+    }
+
+    fun onRegistrationCodeChanged(code: String) {
+        registrationCode = code
+    }
+
+    companion object {
+        const val MAIN_SETTINGS_VIEW = "main_settings_view"
+        const val CONNECT_CONTROLLER_VIEW = "connect_controller_view"
+
+        fun provideFactory(
+            deviceService: DeviceService,
+            bluetoothService: BluetoothService
+        ) = object : ViewModelProvider.Factory {
+            @Suppress("UNCHECKED_CAST")
+            override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                return SettingsViewModel(deviceService, bluetoothService) as T
+            }
+        }
+    }
+}

app/src/main/res/drawable/baseline_arrow_back_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:autoMirrored="true" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M20,11H7.83l5.59,-5.59L12,4l-8,8 8,8 1.41,-1.41L7.83,13H20v-2z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_arrow_downward_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M20,12l-1.41,-1.41L13,16.17V4h-2v12.17l-5.58,-5.59L4,12l8,8 8,-8z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_arrow_forward_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:autoMirrored="true" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M12,4l-1.41,1.41L16.17,11H4v2h12.17l-5.58,5.59L12,20l8,-8z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_arrow_upward_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M4,12l1.41,1.41L11,7.83V20h2V7.83l5.58,5.59L20,12l-8,-8 -8,8z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_check_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M9,16.17L4.83,12l-1.42,1.41L9,19 21,7l-1.41,-1.41z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_fast_forward_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M4,18l8.5,-6L4,6v12zM13,6v12l8.5,-6L13,6z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_fast_rewind_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M11,18L11,6l-8.5,6 8.5,6zM11.5,12l8.5,6L20,6l-8.5,6z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_home_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M10,20v-6h4v6h5v-8h3L12,3 2,12h3v8z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_info_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM13,17h-2v-6h2v6zM13,9h-2L11,7h2v2z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_keyboard_arrow_down_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M7.41,8.59L12,13.17l4.59,-4.58L18,10l-6,6 -6,-6 1.41,-1.41z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_keyboard_arrow_up_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M7.41,15.41L12,10.83l4.59,4.58L18,14l-6,-6 -6,6z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_keyboard_return_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:autoMirrored="true" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M19,7v4H5.83l3.58,-3.59L8,6l-6,6 6,6 1.41,-1.41L5.83,13H21V7z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_list_alt_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:autoMirrored="true" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M19,5v14L5,19L5,5h14m1.1,-2L3.9,3c-0.5,0 -0.9,0.4 -0.9,0.9v16.2c0,0.4 0.4,0.9 0.9,0.9h16.2c0.4,0 0.9,-0.5 0.9,-0.9L21,3.9c0,-0.5 -0.5,-0.9 -0.9,-0.9zM11,7h6v2h-6L11,7zM11,11h6v2h-6v-2zM11,15h6v2h-6zM7,7h2v2L7,9zM7,11h2v2L7,13zM7,15h2v2L7,17z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_login_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:autoMirrored="true" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M11,7L9.6,8.4l2.6,2.6H2v2h10.2l-2.6,2.6L11,17l5,-5L11,7zM20,19h-8v2h8c1.1,0 2,-0.9 2,-2V5c0,-1.1 -0.9,-2 -2,-2h-8v2h8V19z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_pause_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M6,19h4L10,5L6,5v14zM14,5v14h4L18,5h-4z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_play_arrow_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M8,5v14l11,-7z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_power_settings_new_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M13,3h-2v10h2L13,3zM17.83,5.17l-1.42,1.42C17.99,7.86 19,9.81 19,12c0,3.87 -3.13,7 -7,7s-7,-3.13 -7,-7c0,-2.19 1.01,-4.14 2.58,-5.42L6.17,5.17C4.23,6.82 3,9.26 3,12c0,4.97 4.03,9 9,9s9,-4.03 9,-9c0,-2.74 -1.23,-5.18 -3.17,-6.83z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_volume_down_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:autoMirrored="true" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M18.5,12c0,-1.77 -1.02,-3.29 -2.5,-4.03v8.05c1.48,-0.73 2.5,-2.25 2.5,-4.02zM5,9v6h4l5,5V4L9,9H5z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_volume_off_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:autoMirrored="true" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M16.5,12c0,-1.77 -1.02,-3.29 -2.5,-4.03v2.21l2.45,2.45c0.03,-0.2 0.05,-0.41 0.05,-0.63zM19,12c0,0.94 -0.2,1.82 -0.54,2.64l1.51,1.51C20.63,14.91 21,13.5 21,12c0,-4.28 -2.99,-7.86 -7,-8.77v2.06c2.89,0.86 5,3.54 5,6.71zM4.27,3L3,4.27 7.73,9L3,9v6h4l5,5v-6.73l4.25,4.25c-0.67,0.52 -1.42,0.93 -2.25,1.18v2.06c1.38,-0.31 2.63,-0.95 3.69,-1.81L19.73,21 21,19.73l-9,-9L4.27,3zM12,4L9.91,6.09 12,8.18L12,4z"/>
+    
+</vector>

app/src/main/res/drawable/baseline_volume_up_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:autoMirrored="true" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M3,9v6h4l5,5L12,4L7,9L3,9zM16.5,12c0,-1.77 -1.02,-3.29 -2.5,-4.03v8.05c1.48,-0.73 2.5,-2.25 2.5,-4.02zM14,3.23v2.06c2.89,0.86 5,3.54 5,6.71s-2.11,5.85 -5,6.71v2.06c4.01,-0.91 7,-4.49 7,-8.77s-2.99,-7.86 -7,-8.77z"/>
+    
+</vector>

app/src/main/res/values/strings.xml

@@ -13,4 +13,13 @@
     <string name="server_address_label">Server address</string>
     <string name="connection_state_unregistered">unregistered</string>
     <string name="connection_state_registered">registered</string>
+    <string name="controller_state_bluetooth_disabled">Bluetooth is turned off</string>
+    <string name="paired_devices_label">Paired devices</string>
+    <string name="scanned_devices_label">Scanned devices</string>
+    <string name="connect_controller_title">Connect controller</string>
+    <string name="bluetooth_state_connecting">connecting</string>
+    <string name="bluetooth_state_connected">connected</string>
+    <string name="bluetooth_state_disconnected">disconnected</string>
+    <string name="disconnect_button_label">Disconnect</string>
+    <string name="connection_state_connected">connected</string>
 </resources>

gradle/libs.versions.toml

@@ -1,17 +1,27 @@
 [versions]
-agp = "8.9.0"
+agp = "8.9.1"
+cameraCore = "1.4.2"
 kotlin = "2.0.0"
-coreKtx = "1.10.1"
+coreKtx = "1.15.0"
 junit = "4.13.2"
-junitVersion = "1.1.5"
+junitVersion = "1.2.1"
-espressoCore = "3.5.1"
+espressoCore = "3.6.1"
 ktor = "3.1.0"
-lifecycleRuntimeKtx = "2.6.1"
+lifecycleRuntimeKtx = "2.8.7"
-activityCompose = "1.8.0"
+activityCompose = "1.10.1"
-composeBom = "2024.04.01"
+composeBom = "2025.03.01"
-navigationCompose = "2.8.4"
+material3 = "1.4.0-alpha11"
+navigationCompose = "2.8.9"
+streamWebrtcAndroid = "1.3.8"
 
 [libraries]
+androidx-camera-camera2 = { module = "androidx.camera:camera-camera2", version.ref = "cameraCore" }
+androidx-camera-core = { module = "androidx.camera:camera-core", version.ref = "cameraCore" }
+androidx-camera-extensions = { module = "androidx.camera:camera-extensions", version.ref = "cameraCore" }
+androidx-camera-mlkit-vision = { module = "androidx.camera:camera-mlkit-vision", version.ref = "cameraCore" }
+androidx-camera-view = { module = "androidx.camera:camera-view", version.ref = "cameraCore" }
+androidx-camera-video = { module = "androidx.camera:camera-video", version.ref = "cameraCore" }
+androidx-camera-lifecycle = { module = "androidx.camera:camera-lifecycle", version.ref = "cameraCore" }
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
 androidx-navigation-compose = { module = "androidx.navigation:navigation-compose", version.ref = "navigationCompose" }
 junit = { group = "junit", name = "junit", version.ref = "junit" }
@@ -29,6 +39,9 @@ androidx-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit
 androidx-material3 = { group = "androidx.compose.material3", name = "material3" }
 ktor-client-cio = { module = "io.ktor:ktor-client-cio", version.ref = "ktor" }
 ktor-client-core = { module = "io.ktor:ktor-client-core", version.ref = "ktor" }
+ktor-client-websockets = { module = "io.ktor:ktor-client-websockets", version.ref = "ktor" }
+material3 = { module = "androidx.compose.material3:material3", version.ref = "material3" }
+stream-webrtc-android = { module = "io.getstream:stream-webrtc-android", version.ref = "streamWebrtcAndroid" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }