Seeed grove wii nunchuck interface board 5v i2c seeed studio 103020009 p the grove wii nunchuck interface board from seeed studio plugs into the connector on the nunchuck cable and allows an arduino or any other microcontroller with i2c to get data from the nunchuck as well as the thumb stick the wii nunchuck also has an accelerometer and you can read from either of these over i2c better yet there is a wealth of tried and trusted software available on the internet which will simplify