Description
5 December 2025:
The Gateway S3 has been discontinued because the enclosure manufacturer stopped making this specific enclosure.
Have look at the great E32 V2 instead.
The Gateway S3 KIT (Standard WiFi Edition V3 KIT) is a kit with the BBQKees EMS Gateway S3 including all options for a lower price.
Included in this kit are the following items (one each):
- EMS Gateway S3
- 12V DC power supply EU plug or 3 pin UK plug for UK orders
- 110cm EMS service cable
- 100cm EMS screw terminal cable
- 3-lead JST ZH cable (for adding DS18B20 sensors)
- Wall mount bracket
- Very strong 3M double sided foam tape
With this kit you can connect the EMS Gateway to your boiler or heat pump in any situation.
- Via the EMS service jack on the boiler or heat pump (if it has one) by using only the 110cm EMS service cable.
- Via the EMS service jack on the boiler or heat pump (if it has one) by using the 110cm EMS service cable and the 12V DC power supply.
- Via the EMS screw terminal by using the 100cm EMS screw terminal cable and the 12V DC power supply.
With the supplied JST ZH cable you can add your own DS18B20 sensors to the Gateway. You can connect just one, or more sensors in parallel.
The 3M double sided foam tape is strong enough to mount the Gateway vertically on a wall or plastic or metal surface (side of the boiler).
Jeroen (verified owner) –
Dennis (verified owner) –
Easy setup, integration into HomeAssistant after less than 15 min. Perfect.
Volker Lendle (verified owner) –
Super Produkt und einfache Anbindung an das Heizungssystem
Ivan (verified owner) –
Not only it connected mine Bosch Condens to Home Assistant. I also found mine wireless Thermostat CW100 on the same EMS bus. So now I am using EMS-ESP to adjust thermostat and to watch gas usage.
Sven (verified owner) –
Laurent X. (verified owner) –
Works as advertised. Biggest difficulty was to setup a MQTT user to work with Home assistant. But it’s manageable
BBQKees (store manager) –
Hi,
I now added to the instruction in the wiki the step to add a MQTT user before installing the MQTT integration in Home Assistant.
Indeed if you do not know about adding a user for MQTT you can spend hours trying to make it work.
Anonym (verified owner) –
Mihai Sandu (verified owner) –
I was so happy to be able to remotly check and control my boiler. Installation was straight forward, you guys have made everything easy for everyone. Thank you and good luck further!
Andreas K. (verified owner) –
Anbindung an Bosch LWWP Compress i6800 funktioniert perfekt
Ralph (verified owner) –
Easy installation, everything works out-of-the-box.
Peter Albrecht (verified owner) –
Wir haben den Kit gekauft, leider fehlt das Anschluss-Kabel für einen Sensor, bitte Nachlieferung!
BBQKees (store manager) –
Entschuldigen Sie die Unannehmlichkeiten.
Aufgrund eines Fehlers beim Verpacken wurde bei einigen Bestellungen am Ende März 2025 tatsächlich vergessen, das JST-Kabel beizulegen.
Dies wird morgen verschickt.
Anonym (verified owner) –
Uwe Kaiser (verified owner) –
War günstiger als die Einzelteile …. im Einsatz mit Bosch CS6800i und Home Assistant. Installation mit der Anleitung problemlos. Erspart den Weg in den Keller 🙂
Anonym (verified owner) –
Funktioniert super, Leider ist der Klinkenstecker zu lang. Ich kann das Gehäuse nicht schliessen.
BBQKees (store manager) –
Handelt es sich um einen Heizkessel oder eine Wärmepumpe?
Ich habe einen Adapterstecker, den ich Ihnen kostenlos zusenden kann und der möglicherweise funktioniert.
Woox (verified owner) –
Works great with Bosch Compress 3000 AWS 8M Heatpump. Connected it to Home Assistant with MQTT Broker. Plugged it in to service jack – works like a charm!
Originally I got Module IP, which didn’t work as expected. It had been disconnecting with ethernet every couple of days. Probably due to CGNAT network, which I am connected to.
This EMS Gateway saved my life 🙂 Thank You!
Frank R. (verified owner) –
Perfect “all-round carefree package”
Anonymous (verified owner) –
Works great with my Junkers!
Herbert K. (verified owner) –
Martin (verified owner) –
Timo (verified owner) –
Anonym (verified owner) –
Matthias Hollfelder (verified owner) –
Michael N. (verified owner) –
Amazing Number of measurement values, if configured in gateway the language to german, the values are shown in home assistant also in german
Volker S. (verified owner) –
Funktioniert tadellos
Ralf (verified owner) –
Andreas (verified owner) –
Besser geht nicht und einfach eingerichtet.
Robert S. (verified owner) –
Peter K. (verified owner) –
Tolles Produkt mit guter Qualität
Uwe (verified owner) –
Easy to install
Peter A. (verified owner) –
Soeren M. (verified owner) –
Zugriff auf die Buderus WLW 186i Wärmepumpe inkl. Einbindung in Home Assistent funktioniert einwandfrei.
Wim V. (verified owner) –
uitmuntend product! Doet wat het beloofd en dit in 123
Michael Neu (verified owner) –
Works perfectly
Ronald (verified owner) –
Werkt goed. Goede handleiding die je stap voor stapt helpt. Dankzij de duidelijke foto’s kon ik de gateway makkelijk aansluiten.
Udo Lange (verified owner) –
Dirk Zimmermann (verified owner) –
Hat alles super funktioniert für meine Buderus Therme!
Stephan Scheve (verified owner) –
Eingesteckt, konfiguriert und es funktioniert
Andreas (verified owner) –
Works great, smooth plug’n’play experience. Great work!
Peter (verified owner) –
Das Gerät wird mit allen notwendigen Teilen geliefert, funktioniert einwandfrei und ließ sich dank der verständlichen Informationen aus der Dokumentation problemlos in Home Assistant integrieren. Über den Anschluss am Wartungsport des Heizkessels ist keine separate Stromversorgung über das USB-Netzteil erforderlich.
Uwe (verified owner) –
Ohne Probleme, funktioniert.
Michael (verified owner) –