The Arduino component to a Unity-based Accelerometer-tracking system.
https://www.arduino.cc/en/Main/Software
https://www.arduino.cc/en/Guide/Windows
Save the following Arduino software library to your libraries folder (restart IDE after installation):
https://github.com/sparkfun/LSM9DS0_Breakout
Instructions for importing: https://www.arduino.cc/en/Guide/Libraries
Run the head-tracker-arduino.ino sketch in the Arduino IDE.