DIY enthusiast mackswan has developed a custom smart thermostat using an ESP32 microcontroller to provide modern climate control for residential HVAC systems that utilize 120-volt fan coil units.
Key Points
- The device utilizes an ESP32 board running ESPHome firmware to manage heating and cooling functions.
- Hardware includes a 2.42-inch OLED display with automatic brightness and a rotary encoder for user input.
- An SHTC3 sensor provides precise monitoring of ambient temperature and humidity levels within the home.
- A relay mechanism allows the unit to safely switch high-voltage fan coil systems on and off.
- The project offers a functional alternative for apartment and condo residents unable to use standard 24V smart thermostats.