EMS-ESP

Open-source firmware for ESP32 to communicate with EMS heating appliances

📦 Latest Releases

Stable: v3.7.2

Development: v3.7.3

EMS-ESP is an open-source firmware for the Espressif ESP32 microcontroller to communicate with EMS (Energy Management System) compatible equipment from manufacturers such as Bosch, Buderus, Nefit, Junkers, Worcester, Sieger, elm.leblanc and iVT.

🚀 Key Features

🔌 Device Compatibility

EMS, EMS+, EMS2, EMS Plus protocols
Logamatic EMS, Junkers 2-wire
Heatronic 3 and 4
120+ different EMS compatible devices

🌐 Web Interface

Multi-user, multi-language interface
Real-time monitoring and control
Easy settings configuration
11 languages supported

🔧 Integration & Automation

Home Assistant, Domoticz, openHAB
Modbus support
Powerful Scheduler
Notification service

⚡ Advanced Features

External sensor support
Serial/USB & Telnet console
Thermostat simulation
Custom EMS entities

For a complete list of features, read the change log

📱 Live Demo

Try Live Demo

Select your language on the sign-on page and log in with any username and password

📦

Get Started

Ready to install EMS-ESP? Check out our installation guide to get started.

Installation Guide

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Need Help?

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