Skip to content
Buderus Logamatic EMS and EMS+/EMS Plus bus Wiki for Bosch, Buderus, Nefit, Junkers, Worcester devices
Branch: master
Clone or download
Latest commit 6263dca May 3, 2019
Type Name Latest commit message Commit time
Failed to load latest commit information.
Documentation Create Mar 29, 2019 Update May 3, 2019


Buderus Logamatic EMS and EMS+ bus Wiki for Bosch, Buderus, Nefit, Junkers, Worcester devices.

Other names or versions of the EMS bus are EMS+, EMS Plus, EMS2, EMS2.0, Heatronic and Heatronic 3.

Junkers and Nefit also call it '2-Draht-Bus-System' or '2-wire-bus'.

This repository is a collection of EMS protocol- and device documentation gathered from public sources like other Github repositories and of course my older documentation.
Will be filled in bit by bit.

See the Documentation folder for all information.

Links to existing EMS bus documentation

BBQKees' documentation.
External EMS Wiki.

Links to existing EMS bus projects

BBQKees' Arduino HTTP Get interface.
Proddy's ESP8266 MQTT interface.
danimaciasperea' Arduino WiFly interface.
wnelis' Raspberry Pi interface with Python.
Norberts1's Heatronic3/EMS2 Raspberry Pi interface with Python

Links to EMS hardware designs

Purchase an EMS/Heatronic to TTL interface board.
3D printable enclosure for above board.

You can’t perform that action at this time.