Dave, my release (which I’ve been calling sprinklers_pi) was originally built on a 2560 with the W5100 ethernet interface. You should be able to get it running. It’s essentially the exact same code as here: viewtopic.php?f=28&t=244 except it doesn’t support the graphing logging stuff. Besides that however, you wouldn’t really know you were running the raspberry pi version or the version on the 2560. If you’re at all interested, (or anyone else is), I could polish that code up and ship it over…
Could you post your code for Mega2560. I am doing some interval timers for Heating and home automation and this would help me learn from exampoles.