Change PRX module

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Wed Sep 08 10:36:20 CEST 2021
+#Mon Feb 14 14:46:55 CET 2022
 distributionBase=GRADLE_USER_HOME
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.1-bin.zip

profile_hrs/src/main/java/no/nordicsemi/android/hrs/view/HRSState.kt

@@ -6,4 +6,5 @@ import no.nordicsemi.android.service.BleManagerResult
 internal sealed class HRSViewState
 
 internal data class WorkingState(val result: BleManagerResult<HRSData>) : HRSViewState()
+
 internal object NoDeviceState : HRSViewState()

profile_hts/src/main/java/no/nordicsemi/android/hts/repository/HTSManager.kt

@@ -89,7 +89,7 @@ internal class HTSManager internal constructor(
             gatt.getService(BATTERY_SERVICE_UUID)?.run {
                 batteryLevelCharacteristic = getCharacteristic(BATTERY_LEVEL_CHARACTERISTIC_UUID)
             }
-            return htCharacteristic != null
+            return htCharacteristic != null && batteryLevelCharacteristic != null
         }
 
         override fun onServicesInvalidated() {

profile_hts/src/main/java/no/nordicsemi/android/hts/viewmodel/HTSViewModel.kt

@@ -3,9 +3,11 @@ package no.nordicsemi.android.hts.viewmodel
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.flow.*
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
 import no.nordicsemi.android.hts.data.HTSRepository
-import no.nordicsemi.android.hts.repository.HTSService
 import no.nordicsemi.android.hts.repository.HTS_SERVICE_UUID
 import no.nordicsemi.android.hts.view.*
 import no.nordicsemi.android.navigation.*

profile_prx/build.gradle

@@ -13,6 +13,7 @@ dependencies {
     implementation libs.nordic.ui.scanner
     implementation libs.nordic.navigation
 
+    implementation libs.bundles.icons
     implementation libs.bundles.compose
     implementation libs.androidx.core
     implementation libs.material

profile_prx/src/main/java/no/nordicsemi/android/prx/data/PRXRepository.kt

@@ -1,62 +1,97 @@
 package no.nordicsemi.android.prx.data
 
-import kotlinx.coroutines.channels.BufferOverflow
-import kotlinx.coroutines.flow.*
-import no.nordicsemi.android.service.BleManagerStatus
+import android.bluetooth.BluetoothDevice
+import android.content.Context
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.launch
+import no.nordicsemi.android.ble.ktx.suspend
+import no.nordicsemi.android.prx.repository.AlarmHandler
+import no.nordicsemi.android.prx.repository.PRXManager
+import no.nordicsemi.android.prx.repository.PRXService
+import no.nordicsemi.android.prx.repository.ProximityServerManager
+import no.nordicsemi.android.service.BleManagerResult
+import no.nordicsemi.android.service.ConnectingResult
+import no.nordicsemi.android.service.ServiceManager
+import no.nordicsemi.android.service.SuccessResult
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-internal class PRXRepository @Inject constructor() {
+internal class PRXRepository @Inject constructor(
+    @ApplicationContext
+    private val context: Context,
+    private val serviceManager: ServiceManager,
+    private val proximityServerManager: ProximityServerManager,
+    private val alarmHandler: AlarmHandler
+) {
 
-    private val _data = MutableStateFlow(PRXData())
-    val data: StateFlow<PRXData> = _data
+    private var manager: PRXManager? = null
 
-    private val _command = MutableSharedFlow<PRXCommand>(extraBufferCapacity = 1, onBufferOverflow = BufferOverflow.DROP_OLDEST)
-    val command = _command.asSharedFlow()
+    private val _data = MutableStateFlow<BleManagerResult<PRXData>>(ConnectingResult())
+    internal val data = _data.asStateFlow()
 
-    private val _status = MutableStateFlow(BleManagerStatus.CONNECTING)
-    val status = _status.asStateFlow()
+    private val _isRunning = MutableStateFlow(false)
+    val isRunning = _isRunning.asStateFlow()
 
-    fun setBatteryLevel(batteryLevel: Int) {
-        _data.tryEmit(_data.value.copy(batteryLevel = batteryLevel))
+    fun launch(device: BluetoothDevice) {
+        serviceManager.startService(PRXService::class.java, device)
+        proximityServerManager.open()
     }
 
-    fun setLocalAlarmLevel(value: Int) {
-        val alarmLevel = AlarmLevel.create(value)
-        _data.tryEmit(_data.value.copy(localAlarmLevel = alarmLevel))
-    }
+    fun start(device: BluetoothDevice, scope: CoroutineScope) {
+        val manager = PRXManager(context, scope)
+        this.manager = manager
+        manager.useServer(proximityServerManager)
 
-    fun setLocalAlarmLevel(alarmLevel: AlarmLevel) {
-        _data.tryEmit(_data.value.copy(localAlarmLevel = alarmLevel))
-    }
+        manager.dataHolder.status.onEach {
+            _data.value = it
+            handleLocalAlarm(it)
+        }.launchIn(scope)
 
-    fun setLinkLossLevel(value: Int) {
-        val alarmLevel = AlarmLevel.create(value)
-        _data.tryEmit(_data.value.copy(linkLossAlarmLevel = alarmLevel))
-    }
-
-    fun setRemoteAlarmLevel(isOn: Boolean) {
-        _data.tryEmit(_data.value.copy(isRemoteAlarm = isOn))
-    }
-
-    fun invokeCommand(command: PRXCommand) {
-        if (command == Disconnect) {
-            _command.tryEmit(command)
-            _status.tryEmit(BleManagerStatus.DISCONNECTED)
-        } else if (_command.subscriptionCount.value > 0) {
-            _command.tryEmit(command)
-        } else {
-            _status.tryEmit(BleManagerStatus.DISCONNECTED)
+        scope.launch {
+            manager.start(device)
         }
     }
 
-    fun setNewStatus(status: BleManagerStatus) {
-        _status.value = status
+    private suspend fun PRXManager.start(device: BluetoothDevice) {
+        try {
+            connect(device)
+                .useAutoConnect(false)
+                .retry(3, 100)
+                .suspend()
+            _isRunning.value = true
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
     }
 
-    fun clear() {
-        _status.value = BleManagerStatus.CONNECTING
-        _data.tryEmit(PRXData())
+    private fun handleLocalAlarm(result: BleManagerResult<PRXData>) {
+        (result as? SuccessResult<PRXData>)?.let {
+            if (it.data.localAlarmLevel != AlarmLevel.NONE) {
+                alarmHandler.playAlarm(it.data.localAlarmLevel)
+            } else {
+                alarmHandler.pauseAlarm()
+            }
+        }
+    }
+
+    fun enableAlarm() {
+        manager?.writeImmediateAlert(true)
+    }
+
+    fun disableAlarm() {
+        manager?.writeImmediateAlert(false)
+    }
+
+    fun release() {
+        serviceManager.stopService(PRXService::class.java)
+        manager?.disconnect()?.enqueue()
+        manager = null
+        _isRunning.value = false
     }
 }

profile_prx/src/main/java/no/nordicsemi/android/prx/repository/PRXManager.kt

@@ -26,65 +26,84 @@ import android.bluetooth.BluetoothGatt
 import android.bluetooth.BluetoothGattCharacteristic
 import android.bluetooth.BluetoothGattServer
 import android.content.Context
-import android.util.Log
-import kotlinx.coroutines.CoroutineExceptionHandler
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.launch
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
+import no.nordicsemi.android.ble.BleManager
 import no.nordicsemi.android.ble.common.callback.alert.AlertLevelDataCallback
+import no.nordicsemi.android.ble.common.callback.battery.BatteryLevelResponse
 import no.nordicsemi.android.ble.common.data.alert.AlertLevelData
+import no.nordicsemi.android.ble.ktx.asValidResponseFlow
 import no.nordicsemi.android.ble.ktx.suspend
-import no.nordicsemi.android.prx.data.PRXRepository
-import no.nordicsemi.android.service.BatteryManager
+import no.nordicsemi.android.prx.data.AlarmLevel
+import no.nordicsemi.android.prx.data.PRXData
+import no.nordicsemi.android.service.ConnectionObserverAdapter
+import no.nordicsemi.android.utils.launchWithCatch
 import java.util.*
 
-val LINK_LOSS_SERVICE_UUID = UUID.fromString("00001803-0000-1000-8000-00805f9b34fb")
 val PRX_SERVICE_UUID = UUID.fromString("00001802-0000-1000-8000-00805f9b34fb")
+val LINK_LOSS_SERVICE_UUID = UUID.fromString("00001803-0000-1000-8000-00805f9b34fb")
 val ALERT_LEVEL_CHARACTERISTIC_UUID = UUID.fromString("00002A06-0000-1000-8000-00805f9b34fb")
 
+private val BATTERY_SERVICE_UUID = UUID.fromString("0000180F-0000-1000-8000-00805f9b34fb")
+private val BATTERY_LEVEL_CHARACTERISTIC_UUID = UUID.fromString("00002A19-0000-1000-8000-00805f9b34fb")
+
 internal class PRXManager(
     context: Context,
-    scope: CoroutineScope,
-    private val dataHolder: PRXRepository
-) : BatteryManager(context, scope) {
+    private val scope: CoroutineScope,
+) : BleManager(context) {
 
+    private var batteryLevelCharacteristic: BluetoothGattCharacteristic? = null
     private var alertLevelCharacteristic: BluetoothGattCharacteristic? = null
     private var linkLossCharacteristic: BluetoothGattCharacteristic? = null
 
     private var localAlertLevelCharacteristic: BluetoothGattCharacteristic? = null
     private var linkLossServerCharacteristic: BluetoothGattCharacteristic? = null
 
-    private val exceptionHandler = CoroutineExceptionHandler { _, t->
-        Log.e("COROUTINE-EXCEPTION", "Uncaught exception", t)
+    private var isAlertEnabled = false
+
+    private val data = MutableStateFlow(PRXData())
+    val dataHolder = ConnectionObserverAdapter<PRXData>()
+
+    init {
+        setConnectionObserver(dataHolder)
+
+        data.onEach {
+            dataHolder.setValue(it)
+        }.launchIn(scope)
     }
 
-    var isAlertEnabled = false
-        private set
-
-    private inner class ProximityManagerGattCallback : BatteryManagerGattCallback() {
+    private inner class ProximityManagerGattCallback : BleManagerGattCallback() {
         override fun initialize() {
             super.initialize()
 
             setWriteCallback(localAlertLevelCharacteristic)
                 .with(object : AlertLevelDataCallback() {
                     override fun onAlertLevelChanged(device: BluetoothDevice, level: Int) {
-                        dataHolder.setLocalAlarmLevel(level)
+                        data.value = data.value.copy(localAlarmLevel = AlarmLevel.create(level))
                     }
                 })
 
             setWriteCallback(linkLossServerCharacteristic)
                 .with(object : AlertLevelDataCallback() {
                     override fun onAlertLevelChanged(device: BluetoothDevice, level: Int) {
-                        dataHolder.setLinkLossLevel(level)
+                        data.value = data.value.copy(linkLossAlarmLevel = AlarmLevel.create(level))
                     }
                 })
 
-            scope.launch(exceptionHandler) {
-                writeCharacteristic(
-                    linkLossCharacteristic,
-                    AlertLevelData.highAlert(),
-                    BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT
-                ).suspend()
-            }
+            writeCharacteristic(
+                linkLossCharacteristic,
+                AlertLevelData.highAlert(),
+                BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT
+            ).enqueue()
+
+            setNotificationCallback(batteryLevelCharacteristic)
+                .asValidResponseFlow<BatteryLevelResponse>()
+                .onEach {
+                    data.value = data.value.copy(batteryLevel = it.batteryLevel)
+                }.launchIn(scope)
+            enableNotifications(batteryLevelCharacteristic).enqueue()
         }
 
         override fun onServerReady(server: BluetoothGattServer) {
@@ -98,29 +117,26 @@ internal class PRXManager(
             }
         }
 
-        override fun onServicesInvalidated() { }
-
         override fun isRequiredServiceSupported(gatt: BluetoothGatt): Boolean {
-            val llService = gatt.getService(LINK_LOSS_SERVICE_UUID)
-            if (llService != null) {
-                linkLossCharacteristic = llService.getCharacteristic(ALERT_LEVEL_CHARACTERISTIC_UUID)
+            gatt.getService(LINK_LOSS_SERVICE_UUID)?.run {
+                linkLossCharacteristic = getCharacteristic(ALERT_LEVEL_CHARACTERISTIC_UUID)
+            }
+            gatt.getService(BATTERY_SERVICE_UUID)?.run {
+                batteryLevelCharacteristic = getCharacteristic(BATTERY_LEVEL_CHARACTERISTIC_UUID)
             }
             return linkLossCharacteristic != null
         }
 
         override fun isOptionalServiceSupported(gatt: BluetoothGatt): Boolean {
             super.isOptionalServiceSupported(gatt)
-            val iaService = gatt.getService(PRX_SERVICE_UUID)
-            if (iaService != null) {
-                alertLevelCharacteristic = iaService.getCharacteristic(
-                    ALERT_LEVEL_CHARACTERISTIC_UUID
-                )
+            gatt.getService(PRX_SERVICE_UUID)?.run {
+                alertLevelCharacteristic = getCharacteristic(ALERT_LEVEL_CHARACTERISTIC_UUID)
             }
-            return alertLevelCharacteristic != null
+            return alertLevelCharacteristic != null && batteryLevelCharacteristic != null
         }
 
-        override fun onDeviceDisconnected() {
-            super.onDeviceDisconnected()
+        override fun onServicesInvalidated() {
+            batteryLevelCharacteristic = null
             alertLevelCharacteristic = null
             linkLossCharacteristic = null
             localAlertLevelCharacteristic = null
@@ -131,7 +147,7 @@ internal class PRXManager(
 
     fun writeImmediateAlert(on: Boolean) {
         if (!isConnected) return
-        scope.launch(exceptionHandler) {
+        scope.launchWithCatch {
             writeCharacteristic(
                 alertLevelCharacteristic,
                 if (on) AlertLevelData.highAlert() else AlertLevelData.noAlert(),
@@ -139,14 +155,10 @@ internal class PRXManager(
             ).suspend()
 
             isAlertEnabled = on
-            dataHolder.setRemoteAlarmLevel(on)
+            data.value = data.value.copy(isRemoteAlarm = on)
         }
     }
 
-    override fun onBatteryLevelChanged(batteryLevel: Int) {
-        dataHolder.setBatteryLevel(batteryLevel)
-    }
-
     override fun getGattCallback(): BleManagerGattCallback {
         return ProximityManagerGattCallback()
     }

profile_prx/src/main/java/no/nordicsemi/android/prx/repository/PRXService.kt

@@ -1,77 +1,27 @@
 package no.nordicsemi.android.prx.repository
 
+import android.bluetooth.BluetoothDevice
+import android.content.Intent
+import androidx.lifecycle.lifecycleScope
 import dagger.hilt.android.AndroidEntryPoint
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
-import no.nordicsemi.android.prx.data.*
-import no.nordicsemi.android.service.ForegroundBleService
-import no.nordicsemi.android.utils.exhaustive
+import no.nordicsemi.android.prx.data.PRXRepository
+import no.nordicsemi.android.service.DEVICE_DATA
+import no.nordicsemi.android.service.NotificationService
 import javax.inject.Inject
 
 @AndroidEntryPoint
-internal class PRXService : ForegroundBleService() {
+internal class PRXService : NotificationService() {
 
     @Inject
     lateinit var repository: PRXRepository
 
-    @Inject
-    lateinit var alarmHandler: AlarmHandler
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        super.onStartCommand(intent, flags, startId)
 
-    private var serverManager: ProximityServerManager = ProximityServerManager(this)
+        val device = intent!!.getParcelableExtra<BluetoothDevice>(DEVICE_DATA)!!
 
-    override val manager: PRXManager by lazy {
-        PRXManager(this, scope, repository).apply {
-            useServer(serverManager)
-        }
-    }
+        repository.start(device, lifecycleScope)
 
-    override fun onCreate() {
-        super.onCreate()
-
-        serverManager.open()
-
-//        status.onEach {
-//            val bleStatus = when (it) {
-//                BleServiceStatus.CONNECTING -> BleManagerStatus.CONNECTING
-//                BleServiceStatus.OK -> BleManagerStatus.OK
-//                BleServiceStatus.DISCONNECTED -> {
-//                    scope.close()
-//                    stopSelf()
-//                    BleManagerStatus.DISCONNECTED
-//                }
-//                BleServiceStatus.LINK_LOSS -> null
-//            }.exhaustive
-//            bleStatus?.let { repository.setNewStatus(it) }
-//
-//            if (BleServiceStatus.LINK_LOSS == it) {
-//                repository.setLocalAlarmLevel(repository.data.value.linkLossAlarmLevel)
-//            }
-//        }.launchIn(scope)
-
-        repository.command.onEach {
-            when (it) {
-                DisableAlarm -> manager.writeImmediateAlert(false)
-                EnableAlarm -> manager.writeImmediateAlert(true)
-                Disconnect -> stopSelf()
-            }.exhaustive
-        }.launchIn(scope)
-
-        repository.data.onEach {
-            if (it.localAlarmLevel != AlarmLevel.NONE) {
-                alarmHandler.playAlarm(it.localAlarmLevel)
-            } else {
-                alarmHandler.pauseAlarm()
-            }
-        }.launchIn(scope)
-    }
-
-    override fun shouldAutoConnect(): Boolean {
-        return true
-    }
-
-    override fun onDestroy() {
-        super.onDestroy()
-        alarmHandler.releaseAlarm()
-        serverManager.close()
+        return START_REDELIVER_INTENT
     }
 }

profile_prx/src/main/java/no/nordicsemi/android/prx/repository/ProximityServerManager.kt

@@ -25,11 +25,16 @@ import android.bluetooth.BluetoothGattCharacteristic
 import android.bluetooth.BluetoothGattService
 import android.content.Context
 import android.util.Log
+import dagger.hilt.android.qualifiers.ApplicationContext
 import no.nordicsemi.android.ble.BleServerManager
 import no.nordicsemi.android.ble.common.data.alert.AlertLevelData
-import java.util.*
+import javax.inject.Inject
+
+internal class ProximityServerManager @Inject constructor(
+    @ApplicationContext
+    context: Context
+) : BleServerManager(context) {
 
-internal class ProximityServerManager(context: Context) : BleServerManager(context) {
     override fun log(priority: Int, message: String) {
         Log.println(priority, "BleManager", message)
     }
@@ -59,4 +64,4 @@ internal class ProximityServerManager(context: Context) : BleServerManager(conte
         )
         return services
     }
-}
+}

profile_prx/src/main/java/no/nordicsemi/android/prx/view/PRXLinkLossView.kt

@@ -0,0 +1,65 @@
+package no.nordicsemi.android.prx.view
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material3.Button
+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.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import no.nordicsemi.android.prx.R
+import no.nordicsemi.android.theme.R as themeR
+import no.nordicsemi.android.theme.view.ScreenSection
+import androidx.compose.material.icons.filled.HighlightOff
+
+@Composable
+fun DeviceOutOfRangeView(navigateUp: () -> Unit) {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp),
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        ScreenSection {
+            Icon(
+                imageVector = Icons.Default.HighlightOff,
+                contentDescription = null,
+                tint = MaterialTheme.colorScheme.onSecondary,
+                modifier = Modifier
+                    .background(
+                        color = MaterialTheme.colorScheme.secondary,
+                        shape = CircleShape
+                    )
+                    .padding(8.dp)
+            )
+
+            Spacer(modifier = Modifier.size(16.dp))
+
+            Text(
+                text = stringResource(id = R.string.prx_device_out_of_range),
+                style = MaterialTheme.typography.titleMedium
+            )
+
+            Spacer(modifier = Modifier.size(16.dp))
+
+            Text(
+                text = stringResource(id = R.string.prx_device_out_of_range_reason),
+                textAlign = TextAlign.Center,
+                style = MaterialTheme.typography.bodyMedium
+            )
+        }
+
+        Spacer(modifier = Modifier.size(16.dp))
+
+        Button(onClick = { navigateUp() }) {
+            Text(text = stringResource(id = themeR.string.disconnect))
+        }
+    }
+}

profile_prx/src/main/java/no/nordicsemi/android/prx/view/PRXScreen.kt

@@ -11,7 +11,13 @@ import androidx.compose.ui.res.stringResource
 import androidx.hilt.navigation.compose.hiltViewModel
 import no.nordicsemi.android.prx.R
 import no.nordicsemi.android.prx.viewmodel.PRXViewModel
+import no.nordicsemi.android.service.*
 import no.nordicsemi.android.theme.view.BackIconAppBar
+import no.nordicsemi.android.theme.view.scanner.DeviceConnectingView
+import no.nordicsemi.android.theme.view.scanner.DeviceDisconnectedView
+import no.nordicsemi.android.theme.view.scanner.NoDeviceView
+import no.nordicsemi.android.theme.view.scanner.Reason
+import no.nordicsemi.android.utils.exhaustive
 
 @Composable
 fun PRXScreen() {
@@ -19,15 +25,22 @@ fun PRXScreen() {
     val state = viewModel.state.collectAsState().value
 
     Column(horizontalAlignment = Alignment.CenterHorizontally) {
-        BackIconAppBar(stringResource(id = R.string.prx_title)) {
-            viewModel.onEvent(DisconnectEvent)
-        }
+        val navigateUp = { viewModel.onEvent(NavigateUpEvent) }
+
+        BackIconAppBar(stringResource(id = R.string.prx_title), navigateUp)
 
         Column(modifier = Modifier.verticalScroll(rememberScrollState())) {
-//            when (state) {
-//                is DisplayDataState -> ContentView(state.data) { viewModel.onEvent(it) }
-//                LoadingState -> DeviceConnectingView()
-//            }.exhaustive
+            when (state) {
+                NoDeviceState -> NoDeviceView()
+                is WorkingState -> when (state.result) {
+                    is ConnectingResult,
+                    is ReadyResult -> DeviceConnectingView { viewModel.onEvent(DisconnectEvent) }
+                    is DisconnectedResult -> DeviceDisconnectedView(Reason.USER, navigateUp)
+                    is LinkLossResult -> DeviceOutOfRangeView { viewModel.onEvent(DisconnectEvent) }
+                    is MissingServiceResult -> DeviceDisconnectedView(Reason.MISSING_SERVICE, navigateUp)
+                    is SuccessResult -> ContentView(state.result.data) { viewModel.onEvent(it) }
+                }
+            }.exhaustive
         }
     }
 }

profile_prx/src/main/java/no/nordicsemi/android/prx/view/PRXScreenViewEvent.kt

@@ -2,6 +2,8 @@ package no.nordicsemi.android.prx.view
 
 internal sealed class PRXScreenViewEvent
 
+internal object NavigateUpEvent : PRXScreenViewEvent()
+
 internal object TurnOnAlert : PRXScreenViewEvent()
 
 internal object TurnOffAlert : PRXScreenViewEvent()

profile_prx/src/main/java/no/nordicsemi/android/prx/view/PRXState.kt

@@ -1,9 +1,10 @@
 package no.nordicsemi.android.prx.view
 
 import no.nordicsemi.android.prx.data.PRXData
+import no.nordicsemi.android.service.BleManagerResult
 
 internal sealed class PRXViewState
 
-internal object LoadingState : PRXViewState()
+internal data class WorkingState(val result: BleManagerResult<PRXData>) : PRXViewState()
 
-internal data class DisplayDataState(val data: PRXData) : PRXViewState()
+internal object NoDeviceState : PRXViewState()

profile_prx/src/main/java/no/nordicsemi/android/prx/viewmodel/PRXViewModel.kt

@@ -3,17 +3,14 @@ package no.nordicsemi.android.prx.viewmodel
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.flow.*
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
 import no.nordicsemi.android.navigation.*
-import no.nordicsemi.android.prx.data.DisableAlarm
-import no.nordicsemi.android.prx.data.Disconnect
-import no.nordicsemi.android.prx.data.EnableAlarm
 import no.nordicsemi.android.prx.data.PRXRepository
-import no.nordicsemi.android.prx.repository.PRXService
 import no.nordicsemi.android.prx.repository.PRX_SERVICE_UUID
 import no.nordicsemi.android.prx.view.*
-import no.nordicsemi.android.service.BleManagerStatus
-import no.nordicsemi.android.service.ServiceManager
 import no.nordicsemi.android.utils.exhaustive
 import no.nordicsemi.android.utils.getDevice
 import no.nordicsemi.ui.scanner.ScannerDestinationId
@@ -22,19 +19,23 @@ import javax.inject.Inject
 @HiltViewModel
 internal class PRXViewModel @Inject constructor(
     private val repository: PRXRepository,
-    private val serviceManager: ServiceManager,
     private val navigationManager: NavigationManager
 ) : ViewModel() {
 
-    val state = repository.data.combine(repository.status) { data, status ->
-//        when (status) {
-//            BleManagerStatus.CONNECTING -> LoadingState
-//            BleManagerStatus.OK,
-//            BleManagerStatus.DISCONNECTED -> DisplayDataState(data)
-//        }
-    }.stateIn(viewModelScope, SharingStarted.Lazily, LoadingState)
+    private val _state = MutableStateFlow<PRXViewState>(NoDeviceState)
+    val state = _state.asStateFlow()
 
     init {
+        if (!repository.isRunning.value) {
+            requestBluetoothDevice()
+        }
+
+        repository.data.onEach {
+            _state.value = WorkingState(it)
+        }.launchIn(viewModelScope)
+    }
+
+    private fun requestBluetoothDevice() {
         navigationManager.navigateTo(ScannerDestinationId, UUIDArgument(PRX_SERVICE_UUID))
 
         navigationManager.recentResult.onEach {
@@ -42,36 +43,26 @@ internal class PRXViewModel @Inject constructor(
                 handleArgs(it)
             }
         }.launchIn(viewModelScope)
-
-        repository.status.onEach {
-            if (it == BleManagerStatus.DISCONNECTED) {
-                navigationManager.navigateUp()
-            }
-        }.launchIn(viewModelScope)
     }
 
     private fun handleArgs(args: DestinationResult) {
         when (args) {
             is CancelDestinationResult -> navigationManager.navigateUp()
-            is SuccessDestinationResult -> serviceManager.startService(PRXService::class.java, args.getDevice())
+            is SuccessDestinationResult -> repository.launch(args.getDevice().device)
         }.exhaustive
     }
 
     fun onEvent(event: PRXScreenViewEvent) {
         when (event) {
-            DisconnectEvent -> onDisconnectButtonClick()
-            TurnOffAlert -> repository.invokeCommand(DisableAlarm)
-            TurnOnAlert -> repository.invokeCommand(EnableAlarm)
+            DisconnectEvent -> disconnect()
+            TurnOffAlert -> repository.disableAlarm()
+            TurnOnAlert -> repository.enableAlarm()
+            NavigateUpEvent -> navigationManager.navigateUp()
         }.exhaustive
     }
 
-    private fun onDisconnectButtonClick() {
-        repository.invokeCommand(Disconnect)
-        repository.clear()
-    }
-
-    override fun onCleared() {
-        super.onCleared()
-        repository.clear()
+    private fun disconnect() {
+        repository.release()
+        navigationManager.navigateUp()
     }
 }

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

@@ -14,4 +14,7 @@
 
     <string name="prx_is_remote_alarm">Remote alarm</string>
     <string name="prx_local_alarm_level">Local alarm level</string>
+
+    <string name="prx_device_out_of_range">Device out of range</string>
+    <string name="prx_device_out_of_range_reason">Device is out of range and it has disconnected. It should reconnect automatically after device is in range again.</string>
 </resources>