Let's first see what we need to build this project. The project is once again based on the Arduino Uno board, but it will also work with other Arduino boards such as Arduino Mega. Due to the differences in the architecture, especially in the behavior of the serial port, some more recent boards such as Arduino Due or Arduino Leonardo might now work with the code that we are going to build in this project.

Then, the other important component of the project is the Bluetooth module. I used the Bluefruit EZ-Link Bluetooth module from Adafruit for this project. It integrates a Bluetooth chip and all the required electronics for the module to work with Arduino. It is really easy to use and interfaces directly with the serial port of your Arduino board.

Of course, it should be possible to use other Bluetooth modules for this project...