If you're looking for a replacement, try starting here... https://www.hackster.io/projects/tags/thermostat https://www.hackster.io/projects/tags/thermostat Pl

If you're looking for a replacement, try starting here... https://www.hackster.io/projects/tags/thermostat https://www.hackster.io/projects/tags/thermostat Plenty of people have worked on open source / open hardware thermostat systems. Take your anger at this and apply it to them.