I think that version 2.3 works but I don't see anything on the Serial Monitor after changing #define DEBUG from false to true. I can connect my tablet to the Arduino UNO board with Bluetooth module but the Pin 13 LED doesn't work when I touch the buttons next to the "joystick". The values change when I move the "joystick". The LEDs on the Bluetooth module changed from flashing red to non-flashing green.