Hello, I have a system with 8 - 3M-50 thermostats, using U17 on Vera, all work great. However, I would like for the Plug-In to monitor the state of the thermostat’s Y terminal. If it is powered with 24v, it means the compressor unit is ON, it if is with no power, it means compressor is OFF. I would like to be able to make scenes depending if the compressor is running or not, not only if the mode is off, cool, heat or auto.
The reason for above is that I would like to synchronize the number of compressors (units) running simultaneously in order to control maximum power demand at any given time. So… if Y terminal on unit A is ON, then I can put unit B mode in OFF until unit A’s Y terminal is OFF, the unit B can switch mode to COOL… and so on…
I don’t know how to program this, buy I’m sure it can be done and it will be very helpfull. I’m willing to donate a reasonable amount via paypal for this upgrade to the current plug in.
Or perhaps, any ideas how I can monitor this terminal state with a third device that could monitor 24 vac power presence?
Thank you,