samazw/ems-esp

Circuit & ESP8266 code to read and write from Bosch compatible boilers, thermostats & devices that use the EMS/EMS+ bus

EMS-ESP

EMS-ESP is a open-source system to communicate with EMS (Energy Management System) based boilers, thermostats and other modules from manufacturers like Bosch, Buderus, Nefit, Junkers and Sieger.

The code is written for the Espressif ESP8266 microcontroller and supports a telnet console for real-time monitoring and configuration and customizable MQTT support for publishing the information to a home automation system such as Home Assistant or Domoticz.

Please reference the Wiki for further details and instructions on how to build and configure the firmware.

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Features

A web interface for easy configuration and real-time monitoring of the EMS bus

MQTT support for Home Assistant and Domoticz

Telnet for advanced configuration and verbose traffic logging

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Current list of supported EMS devices

Thermostats:

• Sieger ES73
• RC10/Nefit Moduline 100
• RC20/Nefit Moduline 300
• RC20F
• RC30/Nefit Moduline 400
• RC35 (only a single HC)
• RC300/RC310/RC3000
• Nefit Moduline 1010
• Junkers FR10
• TC100/Nefit Easy (read-only)
• Bosch Easy (read-only)
• Bosch CW100 (read-only)

Boilers:

• Buderus GB172/Nefit Trendline
• Nefit Topline Compact/Buderus GB162
• Buderus Logamax U122
• Buderus Logamax plus/GB192
• Sieger BK15 Boiler/Nefit Smartline
• Bosch Condens 2500/Junkers Cerapur Comfort
• Nefit Proline

Solar Modules:

• SM10 Solar Module
• SM100 Solar Module
• Junkers ISM1 Solar Module

Other devices:

• MM10 Mixer Module
• MC10 Module
• WM10 Switch Module
• MM100 Mixing Module
• MM100 Mixing Module
• BC10/RFM20 Receiver
• BC10 Base Controller
• BC25 Base Controller
• Nefit Moduline Easy Connect
• Bosch Easy Connect
• EMS-OT OpenTherm converter
• Web Gateway KM200
• HeatPump Module

Compatible with EMS Gateway

Using BBQKees' EMS Gateway board with integrated Wemos D1: