Send Command to Bluetooth from Android device

Question

I am getting a issue to send Commands from my android device to Bluetooth device.

Bluetooth is associated with a micro-controller. My effort is below:

Answer 1

I have a very simmilar code and it's working, maybe one of the main differences it that I'm doing a reset of threads:

// Reset the ConnectThread because we're done
            synchronized (blablabla.this) {
                mConnectThread = null;
            }

// Cancel the thread that completed the connection
        if (mConnectThread != null) {
            mConnectThread.cancel();
            mConnectThread = null;
        }

    // Cancel any thread currently running a connection
    if (mConnectedThread != null) {
        mConnectedThread.cancel();
        mConnectedThread = null;
    }

    // Start the thread to manage the connection and perform transmissions
    mConnectedThread = new ConnectedThread(socket);
    mConnectedThread.start();

Just after you do:

mmSocket.connect();

hope it helps.

Answer 2

I tried this library. You can try it also https://github.com/palaima/AndroidSmoothBluetooth

Answer 3

As you have mentioned that the issue is there on mmSocket.connect(); line hence, the problem is not while you are sending the command but creating a connection i.e. you are not able to retrieve a BluetoothSocket in opened or connected state.

What should you do ?

Try to use the below code with UUID , its valid for my bluetooth dongles.

UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); createInsecureRfcommSocketToServiceRecord(MY_UUID)

Let me know if this works for you.

Also check, https://stackoverflow.com/a/18786701/1503130