CODEWITHSUNDEEP
androidbluetooth
Mulgard
Mulgard

Reputation: 10569

Bluetooth connect using device UUID

I am trying to connect to a android device using bluetooth and the following code:

public ConnectThread(BluetoothDevice bluetoothDevice) {
    this.bluetoothDevice = bluetoothDevice;

    ParcelUuid[] uuids =  this.bluetoothDevice.getUuids();

    for(ParcelUuid parcelUuid : uuids) {
        Log.v("BluetoothService", "UUID: " + parcelUuid.getUuid().toString());
    }

    BluetoothSocket tempBluetoothSocket = null;

    try {
        tempBluetoothSocket = this.bluetoothDevice.createRfcommSocketToServiceRecord(uuids[0].getUuid());
    } catch (IOException e) {
        Log.e(TAG, "Socket Type: " + "create() failed", e);
    }

    this.bluetoothSocket = tempBluetoothSocket;
}

The output for the UUID's is the following:

02-16 18:27:34.334: V/BluetoothService(2865): UUID: 0000110a-0000-1000-8000-00805f9b34fb
02-16 18:27:34.334: V/BluetoothService(2865): UUID: 00001105-0000-1000-8000-00805f9b34fb
02-16 18:27:34.334: V/BluetoothService(2865): UUID: 00001115-0000-1000-8000-00805f9b34fb
02-16 18:27:34.334: V/BluetoothService(2865): UUID: 00001116-0000-1000-8000-00805f9b34fb
02-16 18:27:34.334: V/BluetoothService(2865): UUID: 0000110e-0000-1000-8000-00805f9b34fb
02-16 18:27:34.334: V/BluetoothService(2865): UUID: 0000112f-0000-1000-8000-00805f9b34fb
02-16 18:27:34.334: V/BluetoothService(2865): UUID: 00001112-0000-1000-8000-00805f9b34fb
02-16 18:27:34.334: V/BluetoothService(2865): UUID: 0000111f-0000-1000-8000-00805f9b34fb
02-16 18:27:34.335: V/BluetoothService(2865): UUID: 00001132-0000-1000-8000-00805f9b34fb

So if i understand that correctly those are the UUID's supported by the device. But if thats true why am i not able to connect to the device using one of those UUID's in my case the UUID at index 0?

02-16 18:27:34.369: E/BluetoothService(2865): read failed, socket might closed or timeout, read ret: -1
02-16 18:27:34.369: E/BluetoothService(2865): java.io.IOException: read failed, socket might closed or timeout, read ret: -1
02-16 18:27:34.369: E/BluetoothService(2865):   at android.bluetooth.BluetoothSocket.readAll(BluetoothSocket.java:512)
02-16 18:27:34.369: E/BluetoothService(2865):   at android.bluetooth.BluetoothSocket.readInt(BluetoothSocket.java:523)
02-16 18:27:34.369: E/BluetoothService(2865):   at android.bluetooth.BluetoothSocket.connect(BluetoothSocket.java:315)

Upvotes: 1

Views: 868

Answers (1)

Pomoinytskyi
Pomoinytskyi

Reputation: 55

I had the same problem when stopped application and not closed connection. Required UUID appears only after phone reboot. BluetoothDevice has cached UUIDs. Run bluetoothDevice.FetchUuidsWithSdp(); for refreshing list of UUIDS.

Upvotes: 1

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