Venstar wifi thermostats have a local API that can be switched on. https://www.home-assistant.io/integrations/venstar/ https://www.home-assistant.io/integratio

Venstar wifi thermostats have a local API that can be switched on. https://www.home-assistant.io/integrations/venstar/ https://www.home-assistant.io/integrations/venstar/ I've not used it (I installed one because I wanted scheduling and liked that it had further possibilities and wasn't overly expensive).