arduino code for triple gauge I built using arduino. My youtube channel uploads have videos used during construction and the final results.
http://www.youtube.com/user/netskink/videos
I gave a presentation on this project at FOSS in Raleigh and at DefCon in Las Vegas for HHV. Here is one version of it. https://docs.google.com/presentation/d/1aC9Kk9lGGvgu6jle9UMkTmX3eTjt8OQHqn5Oco8srgs/edit?usp=sharing
John