Features

DHW temperature control
Heating temperature control
Smart heating temperature control modes:
- PID
- Equithermic curves - adjusts the temperature based on indoor and outdoor temperatures
Hysteresis setting (for accurate maintenance of room temperature)
Ability to connect additional (external) sensors: Dallas (1-wire), NTC 10k, Bluetooth (BLE). Makes it possible to monitor indoor and outdoor temperatures, temperatures on pipes/heat exchangers/etc.
Emergency mode. In any dangerous situation (loss of connection with Wifi, MQTT, sensors, etc) it will not let you and your home freeze.
Ability of remote fault reset (not with all boilers)
Diagnostics:
- Displaying gateway status
- Displaying the connection status to the boiler via OpenTherm
- Displaying the fault status and fault code
- Displaying the diagnostic status & diagnostic code
- Display of the process of heating: works/does not work
- Display of burner (flame) status: on/off
- Display of burner modulation level in percent
- Display of pressure in the heating system
- Display of current temperature of the heat carrier
- Display of return temperature of the heat carrier
- Display of setpoint heat carrier temperature (useful when using PID or Equitherm)
- Display of the process of DHW: working/not working
- Display of current DHW temperature
- And other information...
Home Assistant integration via MQTT. The ability to create any automation for the boiler!

Documentation

All available information and instructions can be found in the wiki:

This project is tested with BrowserStack.