OpenTherm master, slave, and gateway for Arduino, ESP8266, and ESP32.
Talks to OpenTherm boilers and thermostats with the timing and frame checks of the OpenTherm v2.2 specification. Based on OpenTherm Library 1.1.5 by Ihor Melnyk, and keeps its API and its OpenTherm.h header.
| Filename | Release Date | File Size |
|---|---|---|
| OpenThermPlus-2.2.0.zip | 2026-10-27 | 37.68 KiB |
| OpenThermPlus-2.1.0.zip | 2026-10-27 | 32.62 KiB |
| OpenThermPlus-2.0.0.zip | 2026-10-26 | 28.49 KiB |