- 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.