Arduino library to send and receive data from Opentherm devices.
Using this library and special hardware interface you will be able to create your own thermostat to control Opentherm boiler or build a man-in-the-middle gateway to capture or alter communication running between your thermostat and boiler. For detailed information go to

Author: Jiri Praus

Maintainer: Jiri Praus

Read the documentation


This library is compatible with the avr, esp8266 architectures so you should be able to use it on the following Arduino boards:


To use this library, open the Library Manager in the Arduino IDE and install it from there.