Android Bluetooth Pairing without User Enter Pin and Confirmation Using Android API

Question

I\'m a beginner in Android programming since I only started 3 months ago. I\'m doing a project which connects the android app to arduino using bluetooth. I already have a co

Answer 1

I also faced the same problem and after all the research, I figured out the below solution.

(Tested and working!!!)

I am basically looking for a particular bluetooth device (I know MAC address) and pair with it once found. The first thing to do is to create pair request using boradcast receiver and handle the request as below.

IntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_PAIRING_REQUEST);
                intentFilter.setPriority(IntentFilter.SYSTEM_HIGH_PRIORITY);
                registerReceiver(broadCastReceiver,intentFilter);

You need to write the broadcastReceiver and handle it as below.

String BLE_PIN = "1234"
private BroadcastReceiver broadCastReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if(BluetoothDevice.ACTION_PAIRING_REQUEST.equals(action))
        {
            BluetoothDevice bluetoothDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            bluetoothDevice.setPin(BLE_PIN.getBytes());
            Log.e(TAG,"Auto-entering pin: " + BLE_PIN);
            bluetoothDevice.createBond();
            Log.e(TAG,"pin entered and request sent...");
        }
    }
};

Voila! You should be able to pair to bluetooth device without ANY MANUAL INTERVENTION.

Hope this helps :-) Please make it right answer if it works for you.