Sett Home Thermostat – Sett Thermostat
https://sett.homes/
Sett is an open-source, enclosure-compatible version of the 2nd gen Nest thermostat. It reuses the enclosure, encoder ring, display, and mounts of the Nest but replaces the "thinking" part with open-source PCBs that interact with Home Assistant and other local-first home automation setups.