I am trying to create a connection between an Android smartphone (Client) with a Bluetooth app (server) running on a PC.
Below is the code snippet for Client
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
private class ConnectThread extends Thread {
private BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
public ConnectThread(BluetoothDevice device) {
mmDevice = device;
BluetoothSocket tmp = null;
try {
//tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
tmp = device.createInsecureRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
Log.d(TAG, "create() failed", e);
e.printStackTrace();
}
mmSocket = tmp;
}
public void run() {
mAdapter.cancelDiscovery();
try {
mmSocket.connect();
}
catch (IOException e) {
//Exception caught
//java.io.IOException: read failed, socket might closed or timeout, read ret: -1
...
}
...
}
Below is the server code (Uses BlueCover jar)
private void waitForConnection() { LocalDevice local = null;
StreamConnectionNotifier notifier;
StreamConnection connection = null;
try {
local = LocalDevice.getLocalDevice();
local.setDiscoverable(DiscoveryAgent.GIAC);
String uuidstr = "00001101-0000-1000-8000-00805F9B34FB";
String uuid_wo_space = uuidstr.replaceAll("-", "");
String url = "btspp://localhost:" + uuid_wo_space + ";authenticate=false;encrypt=false;name=RemoteBluetooth";
notifier = (StreamConnectionNotifier) Connector.open(url);
}
catch (Exception e) {
e.printStackTrace();
return;
}
// waiting for connection
while(true) {
try {
connection = notifier.acceptAndOpen();
Thread processThread = new Thread(new ProcessConnectionThread(connection));
processThread.start();
}
catch(Exception e) {
e.printStackTrace();
return;
}
}
I have read several links suggesting to change the UUID to "00001101-0000-1000-8000-00805F9B34FB", which i have already tried. I have also tried creating a not secure socket using createInsecureRfcommSocketToServiceRecord, which still fails with the same result.
Below is the IOException stack trace
java.io.IOException: read failed, socket might closed or timeout, read ret: -1
at android.bluetooth.BluetoothSocket.readAll(BluetoothSocket.java:900)
at android.bluetooth.BluetoothSocket.readInt(BluetoothSocket.java:912)
at android.bluetooth.BluetoothSocket.connect(BluetoothSocket.java:531)
Sorry for writing a new answer but this way the information is more visible than the reply. Here's an example list of UUIDs for my device:
UUID: 0000xxxx-0000-1000-8000-00805f9b34fb
i xxxx Status Mode
0 110a N.A.
1 1105 Connected Serial Port Protocol (SPP)
2 1106 Connected File transfer (FTP)
3 1116 N.A.
4 112d Connected Remote SIM mode
5 112f Connected Phone book request
6 1112 Connected
7 111f Connected
8 1132 Connected Message access request