sweet! it would be terribly useful for efficiency tracking if you can squeeze in a speed signal from a vehicles existing speed sensor or an add-on. To track distance/speed and display realtime and trip watts/mile or whatever.
All the pins are used up on that cpu, but maybe you can combine mode and overtemp, or use an internal oscillator or something, wow that thing is loaded up
here is a thread with a couple examples of vehicle speed sensors.
http://ecomodder.com/forum/showthrea...vss-10236.html