This is a 'simple' thermostat controller, using a DS18B20 oneWire temperature sensor on a WeMos D1 Mini Pro. The DS18B20 has a +/-0.5 °C tolerance and is perfectly stable (and even cheaper). I tried ...
A little Collection of Widgets I use in openHAB 3. Some of them are created by People in the Forum, etc. and some are created by me.