The bad new is that there is very little documentation about it. I will try to post as much as I can on this blog about my discoveries.
In some preliminary tests I used the patch for Pure Data provided on the official website here. It uses the object called hidin (on Windows, on linux there’s a better object called hid, see this). I have just printed the values from the hidin object to check which pin was receiving what. With no real sensor connected to the pins the values were fluctuating, by connecting the pin to the ground the values were zeroed (not surprisingly).
This is all by now, I will do some more test and let you know..
BTW: happy xmas !!