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 is the firmware for the ESP32. Compared to version 2 for the ESP8266, this release has
- Ethernet Support
- Pre-configured board layouts
- Writing values directly from the Web UI
- Mock API server for faster offline development
- Expose to more commands, via MQTT
- Improvements to Dallas sensors, Shower service
This version is the latest development track, where as v2 is in maintenance mode.
If you like EMS-ESP, please give it a star, or fork it and contribute!
Note, EMS-ESP requires a small hardware circuit that can convert the EMS bus data to be read by the microcontroller. These can be ordered at https://bbqkees-electronics.nl.
Features
- Compatible with both ESP8266 and ESP32
- A multi-user secure web interface to change settings and monitor the data
- A console, accessible via Serial and Telnet for more monitoring
- Native support for Home Assistant 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 70 EMS devices (boilers, thermostats, solar modules, mixer modules, heat pumps, gateways)
Demo
See a live demo on here. The data you see is static and any username/password is accepted.
Screenshots
Web Interface
 |
 |
 |
 |
Telnet Console
In Home Assistant
Installing
Refer to the official documentation to how to install the firmware and configure it. The documentation is being constantly updated as new features and settings are added.
You can choose to use an pre-built firmware image or compile the code yourself:
Support Information
If you're looking for support on EMS-ESP there are some options available:
Documentation
- Official EMS-ESP Documentation: For information on how to build and upload the firmware
- FAQ and Troubleshooting: For information on common problems and solutions. See also BBQKees's wiki
Support Community
- Discord Server: For support, troubleshooting and general questions. You have better chances to get fast answers from members of the community
- Search in Issues: You might find an answer to your question by searching current or closed issues
Developer's Community
- Bug Report: For reporting Bugs
- Feature Request: For requesting features/functions
- Troubleshooting: As a last resort, you can open new Troubleshooting & Question issue on GitHub if the solution could not be found using the other channels. Just remember: the more info you provide the more chances you'll have to get an accurate answer
Contributors ✨
EMS-ESP is a project originally created by proddy with the main contributors and owners:
proddy v2 v3 |
 MichaelDvP v2 v3 |
You can also contribute to EMS-ESP by
- providing Pull Requests (Features, Fixes, suggestions)
- testing new released features and report issues on your EMS equipment
- contributing to missing Documentation
Libraries used
- esp8266-react by @rjwats for the framework that provides the Web UI
- uuid-* from @nomis. The console, syslog, telnet and logging is based on these libraries
- ArduinoJson
- AsyncMqttClient for MQTT, with modifications from @bertmelis
- ESPAsyncWebServer and AsyncTCP for the Web and TCP backends, with custom modifications for performance
License
This program is licensed under GPL-3.0