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ESP32 Wi-Fi OpenTherm Thermostat

This article describes how to build simple OpenTherm Wi-Fi thermostat using ESP32 WebServer and ESP8266/ESP32 Thermostat Shield. So you can replace traditional room thermostat and control and monitor your boiler remotely via Wi-Fi using web browser on smartphone or personal computer.

Domoticz OpenTherm Thermostat

This article describes how to build a simple OpenTherm Wi-Fi thermostat using ESP8266 Thermostat Shield. So you can integrate your heating control into your Domoticz home automation system.

Home Assistant OpenTherm Thermostat

This article describes how to build and automate a simple OpenTherm Wi-Fi thermostat using ESP8266 Thermostat Shield. So you can integrate your boiler control into your home automation system.

Blynk OpenTherm Thermostat

This article describes how to build simple OpenTherm cloud based Wi-Fi thermostat using Blynk platform and ESP8266 Thermostat Shield. So you can replace traditional room thermostat and control your boiler remotely using mobile application.

OpenTherm Sample

What is OpenTherm?

OpenTherm is communication protocol for Heating, Ventilation and Air Conditioning (HVAC) systems. Most often it is used in communication between a central heating boiler and a room thermostat. OpenTherm protocol is designed to control modulating heating appliances which allows to reach better efficiency and energy saving. It is simple but powerfull protocol with large set of commands which enable the manufacturer to build extra functions into their control devices. Check OpenTherm protocol specification v2.2 for more details.