Friends,
we are here to tell you that new Arduino libraries for UDOO NEO for the UDOO Bricks and the internal motion sensors are now included in the Arduino Board Manager.
You just have to assign the sensors to M4 with the Device Tree Editor. Then follow the official guide to install the Board Manager from an external PC and the guide regarding motion sensors, especially the section named “Use motion sensors from Arduino M4 core”.
It works both with internal and external compilation.
Enjoy!