@jcaron I made another round in the documentation. It would be "nice" if Pycom would REMOVE outdated information or have links directed to one place with the latest documentation. Indeed when searching again: https://pycom.io/wp-content/uploads/2017/04/pysensePinoutCompN3.pdf https://docs.pycom.io/chapter/datasheets/boards/pysense.html So PLEASE Pycom get old documentation from your official website! And release the schematics of the PyTrack and PySense and the mystery around the PIC chip. After all I think your business is the selling of the modules, not the accessories that show how they can be used?!