Yea, your best bet for non cloud/internet stuff is to stick with Zigbee or Zwave. I have a Trane Zwave thermostat https://www.zwaveproducts.com/collections/tran

Yea, your best bet for non cloud/internet stuff is to stick with Zigbee or Zwave. I have a Trane Zwave thermostat https://www.zwaveproducts.com/collections/trane/products/xr524-trane-xr524-thermostat-tzemt524aa21ma https://www.zwaveproducts.com/collections/trane/products/xr5... that’s worked well for several years. For a more advanced use case I’ve recently set it up so that the thermostat logic is within HASS. An automation driven by a binary switch helper then switches the thermostat to a fixed hot or cold value for heat and AC. Then I can feed the HASS thermostat with whatever temperature sensor data I want, like an average of multiple sensors around the house. All this is totally optional though if you just want to control the thermostat from within HASS.