ESPHome OpenTherm gateway

Port of OpenTherm protocol to ESPHome.io firmware. This version is based on the ESPhome version of https://github.com/wichers/esphome-opentherm

Hardware:

The following hardware is used to test and deploy this version: https://diyless.com/product/esp8266-opentherm-gateway

Software:

Publishes multiple sensors to Home Assistant, and a service to override the ch-setpoint in case the boiler misses MSGid9 in the opentherm implementation, and services to enable/disable DHW preheat, also known as comfort/eco mode.

CH override service:

To use the service, send a value > 0 to the gateway using the "ch_temperature_setpoint_override"-service. It will auto enable the CH function and set the target temperature to what you've sent. setting it to 0 disables the CH function.

Example:

service: esphome.openthermgateway_ch_temperature_setpoint_override
data:
  setpoint: 32

DHW Preheat (eco/comfort mode):

To enable or disable the eco/comfort mode (DHW preheat), use the "dhw_preheat_enable"-service and the "dhw_preheat_disable"-service.

Example:

service: esphome.openthermgateway_dhw_preheat_enable
data: {}

Notes:

The ESP32 version of the YAML compiles, but is untested on real hardware.