- HVAC Thermostat based on an esp32 I have a property that is remote and I needed to be able to monitor the temperature and to be able to control the thermostat remotely. Features: - Interfaces to Home Assistant via MQTT messages. - Controls AC, Heat, (de)Humidification, and Fan. - 4 relays - 1.3" display - Rotary Encoder - DHT 22 temp sensor - RTC - 24vac to 5v dc converter - Temperature Schedules - Mini SD card reader - LED status indicator - Push Button for various functions - JTAG debug header - WIFI - Bluetooth While this will control all of your HVAC components, it also serves as a great esp32 dev platform. All usable I/O pins are exposed on a female header. Basically its an esp32 dev platform that includes UX and IO features in a single card. Ultimately I'll create a version of the system in Kit form for others to experiment with.