Gateway E32 (Ethernet + WiFi Edition)

(116 customer reviews)

102,95 incl.VAT/BTW

This product has been discontinued in June 2023. You can get the new model with Ethernet here.


Out of stock

EAN: 8719327747506 SKU: gw-kit-E32-1-5 Category:


This product has been discontinued in June 2023. You can get the new model with Ethernet here.


The Gateway E32 (Ethernet + WiFi edition) is the current Gateway model that is everything you need to add your EMS devices to your home automation system.
In features it’s almost identical to the Gateway S32 but it comes with an additional RJ45 Ethernet port.
This Gateway has a wired AND wireless network connection, so you can choose which one suits your situation best.

Just plug the device into the service jack on the boiler with the optional EMS service cable and stick it to the side of the boiler / heat pump.
If your system does not have a service jack, you can also use the EMS/thermostat wires in parallel to the thermostat or another EMS module.
No additional cables are needed and everything is powered from the jack itself or from an external 12V power adapter.
Its all neatly packed in a nice and small enclosure (90x50x24mm) that fits into your hand.

The Gateway connects via Ethernet and/or WiFi to your home network.


  • Plug-and-play connection to the EMS bus with one cable
  • Connects to the EMS bus via the service jack or the EMS/thermostat wires
  • Based on the ESP32 with 4MB flash
  • 2.4GHz WiFi connectivity
  • RJ45 Ethernet for wired networking
  • EMS-ESP firmware V3.5
  • Responsive webinterface
  • New: English, German, Swedish and Dutch language selection (more to come)
  • Configured for Home Assistant
  • Supports the Home Assistant MQTT Discovery protocol
  • MQTT Discovery now also works with Domoticz and OpenHAB
  • MQTT and Restful API for other interfaces like NodeRED and Loxone
  • Telnet console
  • Optional DS18B20 temperature sensors
  • Supports all EMS heating circuits
  • Support for EMS, EMS+, Heatronic 3 etc.

Supported EMS device types (See the full list here):

  • Boilers
  • Heat pumps
  • Thermostats
  • Solar modules
  • Mixer modules

Power options:

  • Service jack (with the optionally supplied EMS service cable)
  • 7-12V DC (with the optionally supplied power adapter)

If your boiler or heat pump has a service jack you do not need the DC power supply, only the jack cable.
If your system does not have a service jack, or it does but you want to mount the Gateway elsewhere you need the DC power supply.
You can add your own 12V DC power supply later on but I only support the power supplies that can be ordered with the product.
UK buyers: the optional power supply has a 2 pin Euro plug!
Do not use cheap audio cables for the service jack as these have very thin wires inside. Only use the optional EMS service cable below. 

On first boot the Gateway will create an access point on which you can login with a browser and make the appropriate settings for your own network. So for this kit you don’t need any soldering or real programming skills. You do however need to properly configure your home automation system. For Home Assistant, Domoticz and OpenHAB the MQTT discovery is available.

It has an additional connector for directly connecting Dallas 1-wire DS18B20 sensors. You can connect multiple sensors in parallel.

The Gateway can be plugged into the service jack of the boiler, or you can connect it to the EMS bus via the thermostat wires instead. In the latter case you need to use the 12V adapter.
Because the Gateway is an ‘always on’ device it contains high quality components like Panasonic, Samsung and Murata components for maximum longevity of the device.

Included in the kit:

  • Fully assembled and tested Gateway E32 (Ethernet edition)
  • Self adhesive strip
  • JST ZH cable for connecting external DS18B20 sensors (sensors not included).
  • optional: high quality EMS service cable for the service jack
  • Optional: 2-pole Euro plug power supply with 12VDC output and 5.5mm DC barrel jack connector (center pin positive).
  • Optional: 3D printed wall bracket (Its this one)

For all details about this product look at the extensive EMS Bus Gateway product Wiki.
Please consult the information pages before purchase.

The Gateway comes fully assembled, tested on an actual EMS boiler and loaded with the EMS-ESP firmware.

You can download the manual here.

The current firmware of the Gateway already supports the long list of these EMS devices.
If your device is not listed, it might very well be fully or partially compatible. In case you are missing parameters, you can always open an issue on the firmware repository to get support.
If you have an old Nefit Ecomline, Buderus GB112 boiler or the control panel on your boiler looks like one of THESE, then your boiler is not EMS based but iRT. The Gateway will not work on iRT boilers nor is there any support in the firmware.

Datasheet E32 Gateway

Additional information

Weight 0,2 kg
Bus compatibility

EMS, EMS Plus, EMS+, EMS2, Heatronic 3


3,5mm Service jack, EMS bus wire screw terminal, JST connector (for DS18B20 sensors)

Input power options

12V DC adapter, Service jack

DC power supply

12V DC power supply included, No 12V DC power supply

Network options

Ethernet (wired), WiFi (wireless)

HS Code


Origin country


116 reviews for Gateway E32 (Ethernet + WiFi Edition)

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  1. Josip H. (verified owner)

    I’m happy with functionality and flexibility of device. Performs stable and responsive. Simple to use and to integrate in existing system. All in all great product. Can just recommend.

  2. Olivier Delcourt (verified owner)

    Work flawlessly with a Junker Cerapur ZSB 28-3 (and a Junkers FR100 thermostat) via parallel connection on the EMS bus. Datas sended to a MQTT broker. Web interface available and easy to use as the firmware update. A nice have compared to the price and usability of the official Bosch-Junkers MB LAN2 gateway.

    Image #1 from Olivier Delcourt
  3. Alexander (verified owner)

    Nutze das Gateway E32 noch in der WLAN konfiguration. funktioniert alles einwandfrei.

  4. Anonymous (verified owner)

  5. Przemysław K. (verified owner)

    Great product. It started to work out of the box. Zero problems. I am using it with Buderus GB072 v2 over ethernet connection and service jack EMS bus.

  6. Andreas (verified owner)

    Works fine with Buderus.

  7. Robert Škorpil (verified owner)

  8. Klaudiusz Staniek (verified owner)

  9. Florian (verified owner)

  10. Anonymous (verified owner)

  11. Frank P. (verified owner)

    Great product an easy configuration for my Junkers (Bosch) Thanks guys 😉

  12. Anonymous (verified owner)

  13. Marian Badulescu (verified owner)

  14. Ladislau Szoke (verified owner)

  15. Anonymous (verified owner)

  16. Joachim (verified owner)

    I love this product!

  17. Paul (verified owner)

    I’m using the EMS gateway on my Bosch Compress Hybrid 3000i heatpump. It’s was super easy to setup and works reliable and stable.

  18. Dietmar A. (verified owner)

  19. Dietmar A. (verified owner)

    Sehr einfache Instaalation!

  20. Hans Yntema (verified owner)

  21. Anonym (verified owner)

  22. Jur van der Burg (verified owner)

    excellent product

  23. Anonymous (verified owner)

  24. Christian N. (verified owner)

    Perfekter Lieferzustand mit passender Dokumentation. Alles wie erhofft und gewünscht!

  25. Holger B. (verified owner)

    Works perfect with my new Buderus Gas Heater

  26. Marc (verified owner)

    It is really plug and play with the provided service connector, no other wiring required, even no power supply required.

    I use a lot of “domotic” connectors ant IOT stuff but seldom it is so easy to install.
    It was installed in 10 minutes and since then, it’s working like a charm. I’m impressed!

    Buderus GB125/MC10 with RC30 connected to FHEM by MQTT

  27. Anonymous (verified owner)

    Integrated perfect with mqtt and Node-Red >> Influx Db >> Grafana
    Get a clear understanding of the working of my boiler

  28. Luca C. (verified owner)

    Prodotto davvero fantastico, l’ho collegato ad una PDC bosch kompress 7000 ed ha rilevato in automatico tutti i parametri, l’integrazione con home assistant è stata semplicissima. davvero soddisfatto.

    Image #1 from Luca C.
  29. Fabian (verified owner)

    I’m using the Gateway with my Buderus GB192i-25 + RC310 + RC200RF + KM100 + SM100, and it works like a charm. It is connected via audio splitter cable as the KM100 also connected to the 3,5 mm Service Jack.

  30. Christian E. (verified owner)

    Works great with a Buderus G125.

  31. Piotr Bak (verified owner)

    Great, lower cost than mb-lan2 and better functionality!

  32. Wolfgang (verified owner)

  33. Wesly (verified owner)

  34. Daniel (verified owner)

  35. Ferenc (verified owner)

  36. Catalin (verified owner)

  37. Christian (verified owner)

    A really great product. I’m using it with a Junkers ZBS 14-3, MM100 and underfloor heating.
    It helped me a lot to find mistakes in the installation and to optimize the settings.
    Now I’m also able to change settings without going to the boiler and to see the effects without sitting in front of the boiler.

  38. Josef Hufschlag (verified owner)

    Das Gerät erfüllte alle Erwartungen und funktioniert ohne Probleme! Die Programmierung ist ungewöhnlich professionell und bedienerfreundlich erfolgt.

  39. Marc Guhr (verified owner)

  40. Reinhard S. (verified owner)

    Funktioniert bisher einwandfrei. Leider etwas teuer.

  41. Jerzy Łoś (verified owner)

    Moja instalacja

    Image #1 from Jerzy Łoś
  42. Yvan (verified owner)

    Nu 3 weken in gebruik op Buderus Logamax Plus GB142-30. Integratie binnen HA binnen de 2 minuten.

  43. Anonym (verified owner)

  44. Björn (verified owner)

  45. Kai S. (verified owner)

  46. Jürgen Häußler (verified owner)

    All is perfect. I only whish that i can edit some parameters like service and admin settings of the Buderus RC35.

  47. Anonymous (verified owner)

  48. Sam (verified owner)

  49. Andreas (verified owner)

    Usually build and program myself because it never works out of the box. This unit does work straight out of the box and is fun to work with. Thanks for a job well done!

  50. Willem Marsman (verified owner)

    Na langere tijd bezig te zijn geweest de Nefit TowerSolar warmtepomp via de eigen interface overgeschakeld op de oplossing van BBQKees en nu in één keer alle data in Domoticz kunnen inlezen. De gateway herkent direct alle aangesloten onderdelen. Aangesloten op de servicepoort, een zwart kabeltje te vinden in de behuizing.

  51. Filip Majda (verified owner)

  52. Stefan (verified owner)

    Works flawlessly, integration with IOBroker via API, currently using WiFi connection. Heating unit: Buderus WLW196i-8 ARTP120 plus Buffer

    Image #1 from Stefan
  53. Chris (verified owner)

  54. Kai Seipp (verified owner)

    Works great. The website provides all infos needed. Setup went great. I am really happy with this product!

  55. Zentai László (verified owner)

    Than you! It was easy to set up!

  56. Rainer (verified owner)

    Works nicely after inserting my specific Junkers Heatpump

  57. Tobias (verified owner)

    Great product, easy to setup!

  58. Anonymous (verified owner)

    Works excellent with my Bosch heat pump. Successfully integrated into IObroker.

  59. Anonymous (verified owner)

  60. Michael S. (verified owner)

    Connected to a Junkers (now Bosch) Cerapur System and integrated in HomeAssistant. Gives good insights of the current operation mode. Some of the Values were still empty but this might be to the summer mode of the boiler as we currently use only the hot water function.

  61. Finn (verified owner)

    Very nice product. Plug and play. Was easy to integrate into Home Assistant via MQTT

  62. Anders Majland (verified owner)

    Nerdy in a good way, straight plug’n’play with integration to Home Assistant. Now i just need to figure out my heatpump before winter…

  63. Matthias (verified owner)

    Works out of the box. Easy installation.

  64. Torsten (verified owner)

    Immensely helpful for controlling and fine tuning my gas boiler. Works perfectly well with Zigbee2Mqtt + Homeassistant

  65. Tomas (verified owner)

    Had hanging issues despite external power before sw version 3.4.2. After that it has worked flawlessly and I have recommended to my friends.

  66. Stephan S. (verified owner)

    Works perfectly well with my Buderus Logatherm 196i Heatpump.

  67. Bastian (verified owner)

    Had a bit of trouble with the EMS Tx-connectivity, but after updating the firmware to from 3.4.0 to 3.4.2 it now works basically flawlessly with a Buderus GB172 Boiler and RC310 Thermostat. It’s nice to monitor all the parameters and set heating water flow temperatures in Home Assistant in accordance to my radiator thermostats, so there is no gas wasted heating water that is not actually needed to heat the house. Thank you for the great product!

  68. Michael (verified owner)

    easy to install and use product. did work out-of-the-box with any anger. easy configuration and it works very stable. adding 1wire sensors did work very smooth as well

  69. Jan (verified owner)

    I’m highly surprised. This device shows me more settings than my boiler hardware do. Together with a Home Assistant server, I can control everything via browser. This is so cool.
    The only thing I need to setup now, is to get access via internet to control the heater from outside.

  70. Hans Remmerswaal (verified owner)

  71. Sven (verified owner)

    Great Product. Works very well with Buderus GB125 / RC310 setup incl. a mixer for a second heat circle.

  72. Stephen (verified owner)

    Works perfectly – this has unlocked so much info about how my boiler responds to load modulation.

    Image #1 from Stephen
  73. Anonymous (verified owner)

  74. Michael (verified owner)

    Funktioniert super an meinem Buderus GB212, Alle wichtigen Daten sind da.

  75. Tobias B. (verified owner)

    Great product. Works great with Buderus heat pump.

  76. Sebastian M. (verified owner)

    The only thing missing is a weekly calendar to put the heating and hot water on, at least I haven’t found it in home assistant

  77. Markus K. (verified owner)

  78. Michael Ernst (verified owner)

  79. Fabian (verified owner)

  80. Robert (verified owner)

    Love the gateway, works brilliantly, simple to setup and collect data from through HA

  81. Anonymous (verified owner)

    Everything perfect from device perspective. I have a small problem to hide it at the burner, but this is actually a design problem of Bosch/Buderus.

  82. Jochen (verified owner)

    Missing CE certification

  83. Martin (verified owner)

  84. Jesse Wens (verified owner)

    Ik heb reeds 10 jaar een buderus ketel. Met de huidige energieprijzen wou ik de ketel een keer extra goed inregelen. De gateway gaf me de mogelijkheid de parameters op een makkelijke manier uit te lezen. Ik heb de gateway gebruikt om de data te loggen op een raspbery pi met home assistent OS. De integratie in home assistent ging vlot met behulp van de handleiding.

  85. Lukas S. (verified owner)

    works perfectly at first try

  86. roelant (verified owner)

    Good product, totally worked as promised. Good documentation. Very happy with the product. Easy integration with home assistant.

    Image #1 from roelant
  87. werner p. (verified owner)

    plug and play

  88. Reinhard L. (verified owner)

    It´s work´s well with Buderus and iobroker

  89. Mariusz F. (verified owner)

    Works great with Junkers boiler and Home Assistant

  90. Maarten (verified owner)

    WiFi receipt is not so good

  91. Jo De Wée (verified owner)

  92. Paul P. (verified owner)

  93. Markus S. (verified owner)

  94. Daniel (verified owner)

    Cool device – even with very good knowledge base.

    Used to control a Buderus Boiler and Thermostat (GB192i, RC310, RC100). Because the useage of the building is very irregular I read out the Google event calendar and have on a RPi (4B, ext. Temp sensor, Python…) to control the heating appliance automatically according to the calendar entries. The UI shows past and future events and gives the possibility to modify the automatic settings …
    Your device works like a charm and saves us a lot of heating costs…

    Image #1 from Daniel
    Image #2 from Daniel
    Image #3 from Daniel
  95. Anonymous (verified owner)

    Good product and perfect product support.

  96. Grzegorz Sulimka (verified owner)

    Bramke udało się skonfigurować bez większych klopotow i połączyć z miniserwerem LOXONE.
    Prawidlowo udaje się odczytac parametry urzadzen na magistrali EMS. (BUDERUS GB172)
    Problemem dla mnie jest zmiana parametrów urzadzen metoda GET/ POST.
    Opis w dokumentacji na stronie jest dla mnie niejasny.
    Proszę o pomoc.

    • BBQKees (store manager)


      I purchased a Loxone Miniserver so I can make a guide soon.
      You can turn off “Bypass Access Token authorization on API calls” and use GET instead of POST.

  97. Anonymous (verified owner)

  98. Arturas M. (verified owner)

    Connected and integrated to Home Assistant. Easy as should be with correctly built product.

  99. Thomas (verified owner)

  100. Anonymous (verified owner)

  101. Vladimír (verified owner)

  102. Camiel (verified owner)

    I’ve installed two gateways in a hybrid installation (Nefit Enviline & Nefit Topline), both devices report a tremendous amount of data. Together with energy usage from power meters combined into Home Assistant gives me enough information to see whether my installation works efficient.

  103. Alexander (verified owner)

  104. Alexander (verified owner)

  105. Anonymous (verified owner)

  106. Tim (verified owner)

    Excellent device to integrate my Bosch heatpump with the Loxone powered Smarthome via MQTT. Easy installation inside the controller using the service port and a wired lan connection.

  107. Bart B. (verified owner)

  108. Stefan Damman (verified owner)

  109. Roland (verified owner)

    Genau das was ich gesucht habe.

  110. Anonymous (verified owner)

  111. Jörn (verified owner)

  112. Helmut (verified owner)

    Overall, works nearly as described. Unfortuneatly not 100%compatible to the KM Module. I have also few parameters which I’m able to steer with KM Module from Buderus but with the Module E32.

  113. Hans Rossmanith (verified owner)

    Inzwischen funktioniert das Gerät perfekt. Wollte es mit der WLAN-Funktion ausprobieren, hat sich auch mit dem Heimnetz verbunden, aber nur eine leere Seite im Browser angezeigt. Die WLAN-Verbindung in den Keller ist allerdings bei mir nicht gut. Als ich dann die Ethernetleitung gelegt hatte, wurde aber alles angezeigt.
    Gibt es eine eigentlich eine Möglichkeit, die Bezeichnungen zu editieren?

    • BBQKees (store manager)

      Dies kann teilweise über Einstellungen->Anpassungen

  114. Alex N. (verified owner)

    Simple to connect to a Worcester Bosch Greenstar System 24i, MkIV.

  115. Anonymous (verified owner)


    Everything went fine. The device is easy to set up. Boiler is Bosch Condens 2300i with CW400 thermostat. Automation stack: MQTT (Mosquito) + Home Assistant. It works as expected. The device and the firmware are great! Thanks!

  116. Juergen L. (verified owner)


    Works as a charm. Provides more parameters then the built in original module. Biggest advantage: it works without cloud. All in my local network.

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