Folks, the tech details of building a bit of hardware that handle 24vAC as opposed to 12vDC are tiny compared to the number of wiring schemes you intend to support.
So please do both.
There a pretty big RV community out here where we replace the old, dumb, analog thermostat with just about an exact replacement of the 1950’s original.
Reason: no choice, if we want to go “digital” we are told “oh, in that case you have to replace the AC control unit as well”, bang goes another $200"
This is BS, most RV thermostats are
- 12v-input power,
- 12v-outputs for cooling OR heating (never do both at the same time)
- and a fan ( or possibly an extra for hi-fan)
5 or 6 wires. and they are really logic-level, this is a few milliamps at 12v,
we are not running any power here (thats the bloody control box I talked about)
So: need coding help?
I’m in, I do C, C#, Java, Python and just about every other language since I got into the computer field in 1977 (yes, I even do COBOL)
And I have an RV, and a boat, so half the time one is empty, and I want a wifi-enabled thermostat thats NOT tied to some $5 monthly subscription.
Need a beta tester, sign me up, I’ll pony $100 for a beta unit (or two?)