Infrared remote library for ESP8266/ESP32: send and receive infrared signals with multiple protocols. Based on: https://github.com/shirriff/Arduino-IRremote/

OTGateway is a powerful open-source solution for controlling OpenTherm-compatible boilers, turning your heating system into a smart one. Set the perfect temperature, save on energy bills, and eliminate unnecessary hassle — integration with Home Assistant makes heating management simple and automated.

ESPHome component for AUX based air conditioners. Direct wifi control of HVAC by ESPHome and Home Assistant. HVAC status and command feedback are available.

Mitsubishi Electric CN105 to MQTT with ESP8266/ESP32 module

Open source heat pump controller and home automation terminal, built on ESP32

OpenTherm library to create thermostat for OpenTherm enabled boilers and HVACs using an OpenTherm controller and an ESP32 or other microcontroller

CQC (Charmed Quark Controller) a commercial grade, full featured, software based automation system. CQC is built on our CIDLib C++ development system, which is also available here on GitHub.

Home Climate Control ESP32 based edge device firmware

Simple opentherm thermostat domoticz integation sample

VSC /Pio converted from MHI-AC-CTRL Reads and writes data (e.g. power, mode, fan status etc.) from/to a Mitsubishi Heavy Industries (MHI) air conditioner (AC) via SPI controlled by MQTT

WiFi-to-IR Bridge for Air Conditioners (2019→2025) ❄️ Control Any AC with WiFi : Universal ESP8266-based IR bridge supporting 60+ protocols—works with Daikin, Mitsubishi, Samsung & more. Open-source IoT hardware for smart home automation.

The FPTM is a tool developed at NIST and is used to perform passive or active testing and analysis of HVAC systems by interacting in realtime with BACnet systems. The FPTM uses a series of commands to drive the mechanical systems into its various normal modes of operation. Rules may be used to determine whether the system response was appropriate.

🌐 Control your air conditioner remotely with AirBridge, an open-source WiFi-to-IR bridge supporting 60+ protocols for smart, efficient climate management.

Arduino Modular OpenTherm Regulator