CyberNative AI LLC
955a6d8c56
The TIME_ZONES table predates several tz releases, so 32 zones give the
wrong UTC offset today or within the next year when the device applies
the string with setenv("TZ"): Mexico (no DST since 2022), Egypt (DST
again since 2023), Kazakhstan, Morocco, Paraguay, Iran, Jordan, Syria,
Greenland, and from 1 November 2026 British Columbia, Alberta, the
Northwest Territories and Manitoba (permanent UTC-7, -6, -6 and -5).
Each value is now the POSIX TZ footer of the zone's TZif file in IANA
tz 2026e (PyPI tzdata 2026.5). The keys and their order are unchanged.
"UNK" abbreviations become the numeric <+01> form, which newlib accepts.
America/Godthab and America/Scoresbysund still show summer time from
1 January to the last Sunday in March on newlib: their rule time is
negative (M3.5.0/-1) and newlib's tzset reads it as unsigned. That is
a newlib bug, not a table error.
EMS-ESP
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.
It requires a small circuit to interface with the EMS bus which can be purchased from https://bbqkees-electronics.nl. These gateways are tested thoroughly and certified to work with EMS-ESP.
📦 Key Features
- Compatible with EMS, EMS+, EMS2, EMS Plus, Logamatic EMS, Junkers 2-wire, Heatronic 3 and 4
- Supporting over 120 different EMS compatible devices such as thermostats, boilers, heat pumps, mixing units, solar modules, connect modules, ventilation units, switches and more
- Easy to add external Temperature and Analog sensors that are attached to GPIO pins on the ESP32 board
- A multi-user, multi-language web interface to change settings and monitor incoming data
- A simple to use console, accessible via Serial/USB or Telnet for advanced operations and detailed monitoring
- Native integration with Home Assistant, Domoticz, openHAB and Modbus
- Easy setup and install with automatic updates
- Simulation of remote thermostats
- Localized in 11 languages, and customizable to rename any device or sensor
- Extendable by adding own custom EMS entities
- Expandable via adding user-built external modules
- A powerful Scheduler to automate tasks and trigger events based data changes
- A Notification service to alert you of important events
🚀 Installing
Head over to the Installation Guide section of the documentation for instructions on how to install EMS-ESP.
📋 Documentation
Visit emsesp.org for more details on how to setup and configure EMS-ESP. You'll also find more a collection of example configuarations, Frequently Asked Questions and Troubleshooting tips.
💬 Getting Support
To chat with the community reach out on our Discord Server.
If you find an issue or have a request, see the Getting Support section of the documentation. Note if you are using a non-BBQKees EMS gateway, you may need to contact the manufacturer for support.
🎥 Live Demo
To see a live demo go to demo.emsesp.org. Pick a language and use any username and password to log in. Note whast you're seeing is static example data so not all features are operational.
💖 Contributors
EMS-ESP is a project originally created by proddy and maintained by the ems-esp community.
If you like EMS-ESP, please give it a ✨ on GitHub, or even better fork it and contribute. You can also offer a small donation. This is an open-source project maintained by volunteers, and your support is greatly appreciated.
📦 Building
See the Building the firmware guide in the documentation for instructions on how to build EMS-ESP from this source code.
📢 Libraries used
- esp8266-react originally by @rjwats for the core framework that provides the Web UI, which has been heavily modified
- uuid-* from @nomis. The console, syslog, telnet and logging are based off these awesome open source libraries
- ArduinoJson for all the JSON processing
- espMqttClient for the MQTT client
- ESPAsyncWebServer and AsyncTCP for the Web server
📜 License
This program is licensed under GPL-3.0
Screenshots
Web Interface
 |
 |
 |
 |
 |
 |
Telnet Console
Home Assistant
