I'm going for lights on/off, pumps on/off, temperature monitor, pH monitor, salinity monitor when that become available, camera control/access, ATO functions, event/parameter logging. As the tech evolves, I'll decide what other things to build in. At some point I'll probably build a doser as well.
I believe you can run it all off of one. I think i have 28 DPIO pins to use, with 9 currently tied into power control, which will provide pump, lights, heater control. In fact, you can run multiple temp probes from the same pins. Check out the modules on the adafruit website. Ranjib is the lead developer. He has a massive thread on R2R on the reef-pi.
Best bet is to just hit the adafruit site, and ask your question as is on the thread. It is a lot to parse through, and things are constantly changing as development moves forward, bugs are worked out, and new solutions are tested.
He is still releasing modules, so be aware that what is currently published isn't the entire build.
Yes, and light control.
And thank you. My daughter is already working on the art, which is my profile picture.
I'm super excited about it.
