EMS-ESP is an open-source firmware for the Espressif ESP32 microcontroller that communicates with EMS (Energy Management System) based equipment from manufacturers like Bosch, Buderus, Nefit, Junkers, Worcester and Sieger. It requires a small gateway circuit to interface with the EMS bus which can be purchased from https://bbqkees-electronics.nl or custom built.

Features

• A multi-user, multi-language secure web interface to change settings and monitor incoming data
• A console, accessible via Serial and Telnet for more advanced monitoring
• Native support for Home Assistant, Domoticz and openHAB via MQTT Discovery
• Can run standalone as an independent WiFi Access Point or join an existing WiFi network
• Easy first-time configuration via a web Captive Portal
• Support for more than 110 EMS devices (boilers, thermostats, solar modules, mixer modules, heat pumps, gateways, switches, heat sources)

Documentation

For the complete documentation on how to install, configure and get support visit the EMS-ESP Wiki.

Support

To chat with the community reach out on our Discord Server.

If you like EMS-ESP, please give it a star, or fork it and contribute or offer a small donation!

Demo

For a live demo of the Web UI click here and log in with any username/password.

Contributors ✨

EMS-ESP is a project owned and maintained by proddy and MichaelDvP.

Libraries used

• esp8266-react by @rjwats for the framework that provides the core of the Web UI
• uuid-* from @nomis. The console, syslog, telnet and logging are based off these open source libraries
• ArduinoJson for all the JSON
• AsyncMqttClient for the MQTT client, with custom modifications from @bertmelis and @proddy
• ESPAsyncWebServer and AsyncTCP for the Web server and TCP backends, with custom modifications for performance

License

This program is licensed under GPL-3.0

Screenshots

Web Interface

Telnet Console

In Home Assistant