diff --git a/quick_blue/android/src/main/kotlin/com/example/quick_blue/QuickBluePlugin.kt b/quick_blue/android/src/main/kotlin/com/example/quick_blue/QuickBluePlugin.kt
index f73ad2f..f8aeded 100644
--- a/quick_blue/android/src/main/kotlin/com/example/quick_blue/QuickBluePlugin.kt
+++ b/quick_blue/android/src/main/kotlin/com/example/quick_blue/QuickBluePlugin.kt
@@ -61,6 +61,8 @@ class QuickBluePlugin: FlutterPlugin, MethodCallHandler, EventChannel.StreamHand
     mainThreadHandler.post { messageChannel.send(message) }
   }
 
+  fun trace() = Arrays.toString(Throwable().stackTrace)
+
   override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
     when (call.method) {
       "isBluetoothAvailable" -> {
@@ -92,7 +94,7 @@ class QuickBluePlugin: FlutterPlugin, MethodCallHandler, EventChannel.StreamHand
       "disconnect" -> {
         val deviceId = call.argument<String>("deviceId")!!
         val gatt = knownGatts.find { it.device.address == deviceId }
-                ?: return result.error("IllegalArgument", "Unknown deviceId: $deviceId", null)
+                ?: return result.error("IllegalArgument", "Unknown deviceId: $deviceId", trace())
         cleanConnection(gatt)
         result.success(null)
         //FIXME If `disconnect` is called before BluetoothGatt.STATE_CONNECTED
@@ -101,7 +103,7 @@ class QuickBluePlugin: FlutterPlugin, MethodCallHandler, EventChannel.StreamHand
       "discoverServices" -> {
         val deviceId = call.argument<String>("deviceId")!!
         val gatt = knownGatts.find { it.device.address == deviceId }
-                ?: return result.error("IllegalArgument", "Unknown deviceId: $deviceId", null)
+                ?: return result.error("IllegalArgument", "Unknown deviceId: $deviceId", trace())
         gatt.discoverServices()
         result.success(null)
       }
@@ -111,7 +113,7 @@ class QuickBluePlugin: FlutterPlugin, MethodCallHandler, EventChannel.StreamHand
         val characteristic = call.argument<String>("characteristic")!!
         val bleInputProperty = call.argument<String>("bleInputProperty")!!
         val gatt = knownGatts.find { it.device.address == deviceId }
-                ?: return result.error("IllegalArgument", "Unknown deviceId: $deviceId", null)
+                ?: return result.error("IllegalArgument", "Unknown deviceId: $deviceId", trace())
         gatt.setNotifiable(service to characteristic, bleInputProperty)
         result.success(null)
       }
@@ -119,7 +121,7 @@ class QuickBluePlugin: FlutterPlugin, MethodCallHandler, EventChannel.StreamHand
         val deviceId = call.argument<String>("deviceId")!!
         val expectedMtu = call.argument<Int>("expectedMtu")!!
         val gatt = knownGatts.find { it.device.address == deviceId }
-                ?: return result.error("IllegalArgument", "Unknown deviceId: $deviceId", null)
+                ?: return result.error("IllegalArgument", "Unknown deviceId: $deviceId", trace())
         gatt.requestMtu(expectedMtu)
         result.success(null)
       }
@@ -128,14 +130,14 @@ class QuickBluePlugin: FlutterPlugin, MethodCallHandler, EventChannel.StreamHand
         val service = call.argument<String>("service")!!
         val characteristic = call.argument<String>("characteristic")!!
         val gatt = knownGatts.find { it.device.address == deviceId }
-                ?: return result.error("IllegalArgument", "Unknown deviceId: $deviceId", null)
+                ?: return result.error("IllegalArgument", "Unknown deviceId: $deviceId", trace())
         val readResult = gatt.getCharacteristic(service to characteristic)?.let {
           gatt.readCharacteristic(it)
         }
         if (readResult == true)
           result.success(null)
         else
-          result.error("Characteristic unavailable", null, null)
+          result.error("Characteristic unavailable", null, trace())
       }
       "writeValue" -> {
         val deviceId = call.argument<String>("deviceId")!!
@@ -143,7 +145,7 @@ class QuickBluePlugin: FlutterPlugin, MethodCallHandler, EventChannel.StreamHand
         val characteristic = call.argument<String>("characteristic")!!
         val value = call.argument<ByteArray>("value")!!
         val gatt = knownGatts.find { it.device.address == deviceId }
-                ?: return result.error("IllegalArgument", "Unknown deviceId: $deviceId", null)
+                ?: return result.error("IllegalArgument", "Unknown deviceId: $deviceId", trace())
         val writeResult = gatt.getCharacteristic(service to characteristic)?.let {
           it.value = value
           gatt.writeCharacteristic(it)
@@ -151,7 +153,7 @@ class QuickBluePlugin: FlutterPlugin, MethodCallHandler, EventChannel.StreamHand
         if (writeResult == true)
           result.success(null)
         else
-          result.error("Characteristic unavailable", null, null)
+          result.error("Characteristic unavailable", null, trace())
       }
       else -> {
         result.notImplemented()
@@ -286,8 +288,9 @@ val ScanResult.manufacturerDataHead: ByteArray?
 fun Short.toByteArray(byteOrder: ByteOrder = ByteOrder.LITTLE_ENDIAN): ByteArray =
         ByteBuffer.allocate(2 /*Short.SIZE_BYTES*/).order(byteOrder).putShort(this).array()
 
-fun BluetoothGatt.getCharacteristic(serviceCharacteristic: Pair<String, String>) =
-        getService(UUID.fromString(serviceCharacteristic.first)).getCharacteristic(UUID.fromString(serviceCharacteristic.second))
+fun BluetoothGatt.getCharacteristic(serviceCharacteristic: Pair<String, String>): BluetoothGattCharacteristic {
+        return getService(UUID.fromString(serviceCharacteristic.first)).getCharacteristic(UUID.fromString(serviceCharacteristic.second))
+}
 
 private val DESC__CLIENT_CHAR_CONFIGURATION = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb")
 
diff --git a/quick_blue/lib/quick_blue.dart b/quick_blue/lib/quick_blue.dart
index 7be2302..49a0089 100644
--- a/quick_blue/lib/quick_blue.dart
+++ b/quick_blue/lib/quick_blue.dart
@@ -49,24 +49,24 @@ class QuickBlue {
   static Future<bool> isBluetoothAvailable() =>
       _platform.isBluetoothAvailable();
 
-  static void startScan() => _platform.startScan();
+  static Future<void> startScan() => _platform.startScan();
 
-  static void stopScan() => _platform.stopScan();
+  static Future<void> stopScan() => _platform.stopScan();
 
   static Stream<BlueScanResult> get scanResultStream {
     return _platform.scanResultStream
       .map((item) => BlueScanResult.fromMap(item));
   }
 
-  static void connect(String deviceId) => _platform.connect(deviceId);
+  static Future<void> connect(String deviceId) => _platform.connect(deviceId);
 
-  static void disconnect(String deviceId) => _platform.disconnect(deviceId);
+  static Future<void> disconnect(String deviceId) => _platform.disconnect(deviceId);
 
   static void setConnectionHandler(OnConnectionChanged? onConnectionChanged) {
     _platform.onConnectionChanged = onConnectionChanged;
   }
 
-  static void discoverServices(String deviceId) => _platform.discoverServices(deviceId);
+  static Future<void> discoverServices(String deviceId) => _platform.discoverServices(deviceId);
 
   static void setServiceHandler(OnServiceDiscovered? onServiceDiscovered) {
     _platform.onServiceDiscovered = onServiceDiscovered;
diff --git a/quick_blue_linux/lib/quick_blue_linux.dart b/quick_blue_linux/lib/quick_blue_linux.dart
index 83b9f2d..b348f39 100644
--- a/quick_blue_linux/lib/quick_blue_linux.dart
+++ b/quick_blue_linux/lib/quick_blue_linux.dart
@@ -45,20 +45,21 @@ class QuickBlueLinux extends QuickBluePlatform {
   }
 
   @override
-  void startScan() async {
+  Future<void> startScan() async {
     await _ensureInitialized();
     _log('startScan invoke success');
 
-    _activeAdapter!.startDiscovery();
+    final ret = _activeAdapter!.startDiscovery();
     _client.devices.forEach(_onDeviceAdd);
+    return ret;
   }
 
   @override
-  void stopScan() async {
+  Future<void> stopScan() async {
     await _ensureInitialized();
     _log('stopScan invoke success');
 
-    _activeAdapter!.stopDiscovery();
+    return _activeAdapter!.stopDiscovery();
   }
 
   // FIXME Close
@@ -77,19 +78,19 @@ class QuickBlueLinux extends QuickBluePlatform {
   }
 
   @override
-  void connect(String deviceId) {
+  Future<void> connect(String deviceId) {
     // TODO: implement connect
     throw UnimplementedError();
   }
 
   @override
-  void disconnect(String deviceId) {
+  Future<void> disconnect(String deviceId) {
     // TODO: implement disconnect
     throw UnimplementedError();
   }
 
   @override
-  void discoverServices(String deviceId) {
+  Future<void> discoverServices(String deviceId) {
     // TODO: implement discoverServices
     throw UnimplementedError();
   }
diff --git a/quick_blue_platform_interface/lib/method_channel_quick_blue.dart b/quick_blue_platform_interface/lib/method_channel_quick_blue.dart
index 1e673a0..ee8aae2 100644
--- a/quick_blue_platform_interface/lib/method_channel_quick_blue.dart
+++ b/quick_blue_platform_interface/lib/method_channel_quick_blue.dart
@@ -28,19 +28,18 @@ class MethodChannelQuickBlue extends QuickBluePlatform {
 
   @override
   Future<bool> isBluetoothAvailable() async {
-    bool result = await _method.invokeMethod('isBluetoothAvailable');
-    return result;
+    return await _method.invokeMethod('isBluetoothAvailable');
   }
 
   @override
-  void startScan() {
-    _method.invokeMethod('startScan')
+  Future<void> startScan() {
+    return _method.invokeMethod('startScan')
         .then((_) => print('startScan invokeMethod success'));
   }
 
   @override
-  void stopScan() {
-    _method.invokeMethod('stopScan')
+  Future<void> stopScan() {
+    return _method.invokeMethod('stopScan')
         .then((_) => print('stopScan invokeMethod success'));
   }
 
@@ -50,22 +49,22 @@ class MethodChannelQuickBlue extends QuickBluePlatform {
   Stream<dynamic> get scanResultStream => _scanResultStream;
 
   @override
-  void connect(String deviceId) {
-    _method.invokeMethod('connect', {
+  Future<void> connect(String deviceId) {
+    return _method.invokeMethod('connect', {
       'deviceId': deviceId,
     }).then((_) => _log('connect invokeMethod success'));
   }
 
   @override
-  void disconnect(String deviceId) {
-    _method.invokeMethod('disconnect', {
+  Future<void> disconnect(String deviceId) {
+    return _method.invokeMethod('disconnect', {
       'deviceId': deviceId,
     }).then((_) => _log('disconnect invokeMethod success'));
   }
 
   @override
-  void discoverServices(String deviceId) {
-    _method.invokeMethod('discoverServices', {
+  Future<void> discoverServices(String deviceId) {
+    return _method.invokeMethod('discoverServices', {
       'deviceId': deviceId,
     }).then((_) => _log('discoverServices invokeMethod success'));
   }
@@ -96,7 +95,7 @@ class MethodChannelQuickBlue extends QuickBluePlatform {
 
   @override
   Future<void> setNotifiable(String deviceId, String service, String characteristic, BleInputProperty bleInputProperty) async {
-    _method.invokeMethod('setNotifiable', {
+    return _method.invokeMethod('setNotifiable', {
       'deviceId': deviceId,
       'service': service,
       'characteristic': characteristic,
@@ -106,7 +105,7 @@ class MethodChannelQuickBlue extends QuickBluePlatform {
 
   @override
   Future<void> readValue(String deviceId, String service, String characteristic) async {
-    _method.invokeMethod('readValue', {
+    return _method.invokeMethod('readValue', {
       'deviceId': deviceId,
       'service': service,
       'characteristic': characteristic,
@@ -115,7 +114,7 @@ class MethodChannelQuickBlue extends QuickBluePlatform {
 
   @override
   Future<void> writeValue(String deviceId, String service, String characteristic, Uint8List value, BleOutputProperty bleOutputProperty) async {
-    _method.invokeMethod('writeValue', {
+    return _method.invokeMethod('writeValue', {
       'deviceId': deviceId,
       'service': service,
       'characteristic': characteristic,
@@ -137,7 +136,9 @@ class MethodChannelQuickBlue extends QuickBluePlatform {
     _method.invokeMethod('requestMtu', {
       'deviceId': deviceId,
       'expectedMtu': expectedMtu,
-    }).then((_) => _log('requestMtu invokeMethod success'));
+    }).then((_) => _log('requestMtu invokeMethod success')).catchError((e) {
+      _log("requestMtu error: $e"); //TODO Return future that errors if this errors
+    });
     return await _mtuConfigController.stream.first;
   }
 }
diff --git a/quick_blue_platform_interface/lib/quick_blue_platform_interface.dart b/quick_blue_platform_interface/lib/quick_blue_platform_interface.dart
index 722c7f1..ae7e924 100644
--- a/quick_blue_platform_interface/lib/quick_blue_platform_interface.dart
+++ b/quick_blue_platform_interface/lib/quick_blue_platform_interface.dart
@@ -37,19 +37,19 @@ abstract class QuickBluePlatform extends PlatformInterface {
 
   Future<bool> isBluetoothAvailable();
 
-  void startScan();
+  Future<void> startScan();
 
-  void stopScan();
+  Future<void> stopScan();
 
   Stream<dynamic> get scanResultStream;
 
-  void connect(String deviceId);
+  Future<void> connect(String deviceId);
 
-  void disconnect(String deviceId);
+  Future<void> disconnect(String deviceId);
 
   OnConnectionChanged? onConnectionChanged;
 
-  void discoverServices(String deviceId);
+  Future<void> discoverServices(String deviceId);
 
   OnServiceDiscovered? onServiceDiscovered;