Continuing the discussion from Connection through an Asus RT-AC66U:
@neuromancer do you mean this library?
http://playground.arduino.cc/Code/PIDLibrary
Please confirm, and I'll add it to our backlog.
If so, that does look pretty platform independent. If, in fact, it is totally platform independent, it would work to simply paste the library code into your sketch. Worth a try if you want to work with it sooner rather than later.