use charset also for sending

Author: augonis

androidBluetoothSerial/src/main/java/com/harrysoft/androidbluetoothserial/BluetoothManager.java

@@ -61,7 +61,7 @@ public Single<BluetoothSerialDevice> openSerialDevice(String mac) {
     /**
      * @param mac The MAC address of the device
      *             you are trying to connect to
-     * @param charset The Charset to use to decode incoming stream
+     * @param charset The Charset to use for input/output streams
      * @return An RxJava Single, that will either emit
      *          a BluetoothSerialDevice or a BluetoothConnectException
      */

androidBluetoothSerial/src/main/java/com/harrysoft/androidbluetoothserial/BluetoothSerialDevice.java

@@ -47,7 +47,7 @@ static BluetoothSerialDevice getInstance(String mac, BluetoothSocket socket, Cha
      */
     public Completable send(String message) {
         requireNotClosed();
-        return Completable.fromAction(() -> { if (!closed) outputStream.write(message.getBytes()); });
+        return Completable.fromAction(() -> { if (!closed) outputStream.write(message.getBytes(charset)); });
     }
 
     /**