Anyone got this to replace their thermostat? Like sensors in zoneA signal and a device connected to the HVAC triggers ON? Maybe they're on WiFi or Ethernet connection?
I also have temperature reported to home assistant where I have pyscript automation that controls AC based on multiple temperature sensors, open window sensors, humidity, presence, time, etc to most efficiently cool down my apartment
if you need to get signal on a wire, you can output it from the same device, from other esphome device or through home assistant using integration.
I control my devices (I have a lot more than just for the radiators) through a kind of interface that I wrote myself (PHP and only very few, reliable dependencies) because I hate maintaining Home Assistant.
The total cost was maybe $30 of parts on AliExpress.
I use 433Mhz Acurite temperature sensors with a software defined radio (rtl433) running on my Home Assistant box to have remote temperature sensing. The 433MHz sensors are cheap, have good range, and have excellent battery life.
I know the Mitsubishi "wired controllers" (basically the official thermostats) can provide remote temp to the unit and the unit has DIP switches to select between thermostat-reported temp and internal return air sensor temp.
I'm not sure if CN105 has a way to provide this temp ref - if so, you could try it. Just make sure to set your wired controller (if any) as a "secondary" controller (otherwise it will also send its temp every second and overwrite the one you sent) and then set the proper DIP switch.
You can have your thermostat in home assistant and make your HVAC run as efficiently as possible at the same time.