Can anyone recommend a thermostat system that is self-hosted (no third-party cloud) and integrates into homeassistant nicely? Something tasmota based would be even better.
This is the final bit of home automation that’s been difficult to solve. I’ve got a heat pump system and there are very few smart thermostat systems that aren’t beholden to a public cloud service.
Radio Thermostat’s CT50 is supposed to be able to function without being Internet connected and owners say it works well. It has quirks though. It is kind of a strange design with empty slots for radio modules that are visible from the sides when not populated. People suggest putting white electrical tape over unused slots, but that kind of kludge on something that costs $100 isn’t something that inspires confidence. Neither does the fact that although both Z-Wave and Wifi modules are supported, the company’s website doesn’t have the modules listed for sale at the moment.
Right now the Honeywell T6 (Z-Wave) seems to be the best choice. It gets really good reviews on Amazon. Z-Wave USB adapters are relatively inexpensive if you don’t have one and in my experience not hard to set up.