Is there anything with local API that can be used to read current room temperature and also allow me to change and read temperature setpoint? I will have more than one heat source and want to apply certain logic when to use each of them. For example, if it is really cold outside, I would open TRV valve (which turns on pellet boiler) instead of using heat pump. Now I have to control them both manually and separately.
So basically I need something similar to Nest or Ecobee, but without the need for them to control heating or cooling directly. I just need some API to read current temperature and setpoint. It can be WiFi, Zigbee, Z-Wave as long as I can communicate with it somehow.
Honeywell T6 Pro has a Z-Wave option. There is also a WiFi device, but I could not find an information if it has local API. Might be cloud only and I’m not sure if it will be available for Europe. Any other similar devices?