Olimex MOD-IO2 library and examples for Arduino IDE Notice that MOD-IO2 board has to be connected to Arduino-compatible board via I2C, GND and it needs 12V DC power supply if you want to use its relays. - How to load this library and examples in Arduino IDE? You can import the whole zip archive. To do so: Navigate to Sketch -> Include Library - > Add .ZIP Library and point to MOD_IO2.zip Then you can load the examples from: File - > Examples -> MOD_IO2