I have some problems with the connection between my EV3 and my Android-Device. I am able to receive Data with my EV3, but I can't send. I have signed up with my Github account if you like to see the App.
Here is my Code:
public class Bluetooth {
public static int speed = 100;
public static BTConnector connector;
public static NXTConnection connection;
public static void main(String[] args) throws IOException {
openConnection();
Thread moveWithBluetoothThread = new Thread(new moveWithBluetooth());
moveWithBluetoothThread.start();
}
public static void openConnection() {
connector = new BTConnector();
LCD.drawString("Waiting for Connecrion", 3, 1);
connection = connector.waitForConnection(0, NXTConnection.RAW);
LCD.clear();
LCD.drawString("Connected", 3, 5);
}
}
class moveWithBluetooth implements Runnable {
@Override
public void run() {
while (true) {
InputStream is = Bluetooth.connection.openInputStream();
BufferedReader dis = new BufferedReader(new InputStreamReader(is), 1);
OutputStream os = Bluetooth.connection.openOutputStream();
BufferedWriter dos = new BufferedWriter(new OutputStreamWriter(os), 1);
try {
byte[] b;
for (int i = 0; i < 100; i++) {
String n = dis.readLine();
System.out.println(n);
b = n.getBytes();
Bluetooth.connection.write(b, b.length);
Thread.sleep(10);
dos.write(n);
dos.flush();
}
dis.close();
dos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
I found out, that there was no Problem with my EV3. That means, you can use this code. If you are having the same Problem, here is my solution:
The Problem was the Library I use in my Application. At the "Tssues"-Tab of Github was my Problem. The library waits until there is a complete Transmission, but the EV3 sends a permanent Stream, so I just had to add
\r\n
at the end of my Transmission. My final Code looked like that: