EMS-ESP is an open-source firmware for the Espressif ESP8266 and ESP32 microcontroller that communicates with EMS (Energy Management System) based equipment from manufacturers like Bosch, Buderus, Nefit, Junkers, Worcester and Sieger.
This repo contains various scripts and utilities related to different software and hardware integrations, such as home automation systems.
See also the EMS-ESP documentation for configuration help.