There's a company called "izone" which make a smart controller system and they have an interface module that communicates between the main unit and the "izone system" so it seems the interface communication protocol can be accessed and that's basically what I'm after!!
As for the thermistors...
Hi all, i'm very new with electronics, looking to get a better understanding.
I work as a HVACR tech and I've been looking into making an Arduino thermostat to use mainly on Panasonic's ducted inverter A/C.
The issue i'm facing is that i don't know how the controller talks to the indoor PCB...