Gateway Premium II (P2)

(95 customer reviews)

69,95 incl.VAT/BTW

This product has now been replaced by the Gateway S32

(Don’t use the stock alert option below, it’s never going to be back in stock.)

Out of stock

SKU: gw-kit-P2 Category:


This product now has a successor: the Gateway S32.

The EMS Gateway Premium II kit is the all time bestseller and includes everything you need to add your EMS devices to your home automation system.

Just plug in the device into the service jack on the boiler with the supplied jack cable and stick it to the side of the boiler.
No additional cables are needed and everything is powered from the jack itself or from the EMS bus wires.
Aside from the service jack you can also use the EMS/thermostat wires in parallel to the thermostat.
The Gateway connects via Wi-Fi to your home network.

Its all modular by design and neatly packed in a small enclosure (90x50x24mm) that fits into your hand.


  • Now with the awesome EMS-ESP firmware version V2.2!
  • 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
  • 2.4GHz Wi-Fi connectivity
  • Based on the ESP8266
  • Rresponsive webinterface
  • Firmware updateable via the webinterface
  • Configured for Home Assistant
  • Plugin for Domoticz
  • MQTT and Restful API for other interfaces like OpenHAB and Loxone
  • Telnet console
  • Optional DS18B20 temperature sensors
  • Supports all EMS heating circuits
  • Support for EMS, EMS+, Heatronic 3 etc.
  • Each product is tested on an actual EMS boiler before shipment

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

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

Power options:

  • Service jack (with the supplied cable)
  • EMS bus/thermostat wires
  • USB adapter (not included)

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 MQTT is available and for Domoticz an easy to use plugin.

It has an additional connector for directly connecting Dallas 1-wire DS18B20 sensors.

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 it gets its power from the bus itself just like a normal thermostat.
In case there are already too many EMS devices on the bus, it can be powered with a USB adapter as well.
Because the Gateway is an ‘always on’ device it contains high quality components like Panasonic and Murata capacitors for maximum longevity of the device.

Included in the kit:

  • Fully assembled and tested Gateway Premium II
  • Self adhesive/magnetic strip
  • 3,5mm jack cable for the service jack
  • JST cable for connecting external DS18B20 sensors (sensors not included).

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 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 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 without a modification nor is there any support in the firmware.

Additional information

Weight 0,125 kg
Bus compatibility

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

Input power options

EMS bus/Thermostat wires, Service jack, USB adapter

Home automation

Domoticz (Plugin), General MQTT, Home Assistant (YAML)


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


BBQKees Electronics



95 reviews for Gateway Premium II (P2)

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  1. Fabien COUTURIER (verified owner)

  2. Marlon N. (verified owner)

    Great product! Configuration was easy and I found the wiki well documented, very helpful. I’m using this gateway in combination with Node-Red and everything works like a charm.

  3. Sven Pohl (verified owner)

  4. Anonymous (verified owner)

    Goed produkt en werkt goed. Goede documentatie ook verder.

  5. Kristaps K. (verified owner)

  6. Roman N. (verified owner)

  7. Arie Buijs (verified owner)

    Works verygood, no problems at all

  8. Edmund Philipp (verified owner)

  9. Attila C. (verified owner)

  10. Mourad D. (verified owner)

  11. Aleksander B. (verified owner)

    Kit very easy to connect and setup. I have linked it with the HomeAssistant on RPI. Thanks this small device I already have done changes to my boiler configuration. As all the produced graphs in HA given me clear evidence the way how it worked before was not too

  12. brett bailey (verified owner)

  13. Ranjan B. (verified owner)

  14. Liviu Amarandei (verified owner)

    As already informed, at the begining it was not working; it was necessary to replace ESP 8266 from inside with another one that I buyed from another shop.
    Just now i consider it a great tool, but for shure is necessary to pay attention when you as company/workshop sell something .

  15. Hugo (verified owner)

  16. Bartek N. (verified owner)

    waiting for gas meter 😉

  17. Matthias B. (verified owner)

    Sehr gutes Produkt, auspacken, einstecken und loslegen!

  18. Bart Plessers (verified owner)

  19. Anonymous (verified owner)

  20. Anonymous (verified owner)

    works perfect!

  21. Rainer Obermeier (verified owner)

  22. Sergey M. (verified owner)

    Ожидал от устройства немного большего (планировал иметь возможность управлять котлом), но углубившись в проблему управления понял что это действительно сложная задача. В итоге купил дополнительно контроллер rc300 и реализовал все что хотелось. Из полезного настроил вывод ошибок котла, что помогло устранить проблему в отопительный системе.

  23. Michal Bárta (verified owner)

    Perfect product, immediately working. Existing documentation and continuous sw upgrades.

  24. Ladislav (verified owner)

    Fantastic device

  25. Christian M. (verified owner)

  26. Torsten Stark (verified owner)

    Klappt einwandfrei

  27. Wojciech A. (verified owner)

  28. Jakub J. (verified owner)

  29. Andreas F. (verified owner)

    Liefert zuverlässig die Werte meiner Heizung

  30. Anonymous (verified owner)

  31. Steffen Pohl (verified owner)

    It does, what it supposed to do, nice Web GUI for the esp8266, respect! I use it together with a Buderus heating.

  32. Markus Z. (verified owner)

    excellent device, well documented, easy to setup and it just works

  33. Heinrich Peters (verified owner)

    Works great,

  34. Rudy B. (verified owner)

  35. Peter A. (verified owner)

    Easy to install and configure. Took less than 10mins to configure and connect to my existing Home Assistant setup. Have since added a few Dallas DS18B20 temperature probes, no problem.

  36. Torsten (verified owner)

  37. Agoston Lorincz (verified owner)

  38. Torsten (verified owner)

  39. Rene (verified owner)

    voldoet aan mijn verwachtingen. ik wilde graag de informatie van mijn Nefit CV ketel loggen in Domoticz. middels een duidelijke handleiding was alles snel geinstalleerd.

  40. Tobias S. (verified owner)

    Works like a charm. Two things worth mentioning:
    – Restart the gateway after MQTT connection changes
    – I don’t know if you need to turn off the boiler for connect, because the (Buderus chosen) 3,5 headphone plug is prone to shortcut the pins during insertion. I did turn it off to be safe.

  41. Johannes Wagner (verified owner)

    Great documentation, especially in combination with EMS-ESP and from v2 on awesome software

  42. Bernd (verified owner)

    Perfect! Really plug&play (if you read the manual 😉

  43. Pierre NEE (verified owner)

    every are fine. work with jeedom by using mqtt. I recommand this product to monitor, control your boiler.

  44. Sven (verified owner)

  45. Christoph (verified owner)

  46. Dennie (verified owner)

  47. Hans R. (verified owner)

    Works like a charm on my junkers boiler! Integrated ems-esp into home assistant to control my thermostat remotely.

  48. Alain S. (verified owner)

    Very easy to set-up with Home assistant – especially since 2.x firmware

  49. Anonymous (verified owner)

  50. Alexandru-Sever (verified owner)

    product works great, and support on github issues was very fast

  51. Anonymous (verified owner)

  52. Peter Cipov (verified owner)

    hi I would welcome if gas sensor was already in. so it can be used also for gas emision monitoring. otherwise this unit works flawlesly.

  53. Juraj Andrássy (verified owner)

  54. Steve (verified owner)

    Works great out of the box together with ioBroker in a smarthome network

  55. Martijn G. (verified owner)

  56. Nick Fisk (verified owner)

    Excellent bit of kit. Plugged single connection into the service jack and worked first time.

  57. Robbert (verified owner)

    Works like a charm – easy to update. Recommended solution!

  58. Marcin Egert (verified owner)

  59. Anonym (verified owner)

  60. Anonymous (verified owner)

  61. Christian (verified owner)

    Control of my Junkers cerapur zsb 24-5 with two heating circuits (heater & underfloor heating) successfully set up. Since update to software version v2 with nice and clear UI. Functional and trouble-free control of the most important components / heating circuits & heating can be switched off completely or individually depending on my thermostats. Reading all status values enables efficient and logical control.

  62. Markus (verified owner)

    Solid, well-built product.

  63. Stefan (verified owner)

  64. Christian S. (verified owner)

    Super Verarbeitung und einfach zu verbinden. Läuft mit der vorinstallierten EMS-EPS Firmware ohne Probleme; ich nutze es via MQTT AutoDiscovery mit Home Assistant. Ich hatte nie mehr Freude an unserer Gasheizung und der Optimierung der Heizkurve. Würde ich jederzeit wieder kaufen.

  65. Wytze (verified owner)

  66. Heiko (verified owner)

    The device is well designed. It came with all the connectors I needed and even some candy.

  67. Per Lund (verified owner)

    Displayed functions from BBQ webpage (could shot, manual and auto) is not supported by gas boiler. I can only use the gateway for showing values.

  68. Stefan (verified owner)

    It works quite reliable with – apparently – re-boots now and then (I notice the blue LED flashing once a week – searching for WIFI?) . Possibly this is a supply voltage issue on the interface. I have connected it to the Buderus RC35, close to WIFI-router.

  69. Jürgen (verified owner)

    Is working well with Bosch ZSB24-5C

  70. Thomas (verified owner)

    When purchased some month ago the gateway was not working in parallel to the IP-gateway of boiler (km200). Since firmware version 2.2 the gateway is now working stable. I need a seperate USB powersupply, since I wanted to connect to the EMS Bus and not the service jack.
    The data communication works by mqqt and web-api absolutely stable. I wanted to control the circulation pump and get realtime data (every 10 secs) – this is working fine. KM200 does not support ww circulation but still has a lot of more other datapoints. For the combination of both (EMS-gateway and KM200) is ideal for me.
    I hope for further developments of the firmware to add additional functionality and can recommend the gateway. The actual gateway version has already some further improvements in housing and connectors. Well done Kees.

  71. Anonymous (verified owner)

  72. Herbert (verified owner)

    Ein gutes Gateway für die Verbindung mit meiner Buderus Logamatic Heizung

  73. David Mitchell (verified owner)

  74. Ralf (verified owner)

    Worth it’s money. Feels like a quality product to me, well designed user interface through webpage, easy to use by MQTT also. For me, only the data cable needed to be connected to my Nefit boiler, works fine!

  75. Stanislav G. (verified owner)

    Device works very well, with Buderus it brings dozens of useful entities for HA, thanks to MQTT it´s easy to use values for automations, lovelace components are 100%. Only thing that doesn´t fit with Buderus is the jack cable, better would be to add the cable witch 90° ending so that you can close the service door on Buderus Logamax after connecting…

  76. Anonym (verified owner)

  77. Jochen P. (verified owner)

  78. Roman Mezirek (verified owner)

    Great solution. I like the way how it is designed and build. It is hard to propose any suggestion for an improvement.

  79. Andrzej (verified owner)

    Everything that’s needed was in the package, including a pack of gummis.

    Connected to my Buderus Logamax Plus GB062 using a two-wire EMS connection. No external power was needed despite a thermostat being plugged to the same terminal.

  80. Christian G. (verified owner)

    Good product

  81. A.R. T. (verified owner)

    Meer dan 60 waardes zijn uit te lezen.

  82. Tommaso V. (verified owner)

    Well packed, well boxed, immediately functional as expected. The magnetic adesive tape and the ready cables are allowing a non invasive installation
    Software did work without glitches
    Installed with MQTT and Domoticz

  83. Anonymous (verified owner)

  84. ANTON MAZAEV (verified owner)

    Connected to Home Assistant via MQTT. It works just right. No questions, no troubles. Buderus 72 + RC300.

  85. Tomasz Krzyzak (verified owner)

    I purchased to Gateway Premium II to control/monitor my Junkers Cerapur Comfort boiler with FW200 thermostat. All the configuration went very soothly without problems – the biggest “challange” for me was actually disassembling Junkers boiler and connecting the cables inside, as I never done such things before 🙂 I have setup the EMS-ESP integrated into my OpenHab 3.0 installation. All went very easy and I created my Things/Items configuration files based on some examples from OpenHab forum. I have exposed all of that through OH cloud to OH mobile app (some screenshots from OH mobile app attached – however in Polish :)). All works very stable and seamlessly for the past few weeks. I do not plan to put any control/override through EMS-ESP on this installation (changing the parameters of the heating or hot water) as all is well set with my FW200 and weather based controller and I would like to enjoy just the readout of the current status of heating/hot water. Great product and easy to install!

    Image #1 from Tomasz Krzyzak
    Image #2 from Tomasz Krzyzak
  86. Anonymous (verified owner)

    Works out of the box with my old Junkers Ceraclass Excellence ZSC 28-3 MFA E 23. Thought i’d develop my own interface for this but Gateway Premium II (P2) is so well done it doesn’t worth the effort to re-invent the wheel. With EMS-ESP firmware pre-loaded it’s really just plug and play.

    Image #1 from Anonymous
  87. Anonym (verified owner)

  88. Stefan W. (verified owner)

    I had too many heating circuits/devices running which the ESP could not handle. Ordered the ESP32 version instead and I’m super happy.

  89. James (verified owner)

    Great product and very easy installation. Hooked it up to the EMS-Bus via 2-wire.
    I‘m facing some issue on my Buderus RC300 Thermostat now which is showing me the fault code „A11/1037“. This seems to be an issue with the external temperature sensor. This mistake only appears when the Gateway is connected. I checked the wiring and everything is fine. The fault message with the code disapears from time to time for a while and reapears again. I can monitor the mistake on the temperature graph of the RC300. It usually shows a solid line following the outside temperature. With the gateway connected it is interupted (see pictures).
    The gateway itself has no quality losses or mistakes on the EMS Bus.
    The system seems to run smooth and does what it should. But this mistake makes me nervous. Anybody else with a similar issue?

    Image #1 from James
    Image #2 from James
    Image #3 from James
    • hondapower (store manager)

      Reply BBQKees:
      We discussed the problem and it’s a very specific issue with the combination of the GB192i/9000i boiler, a RC300/RC310 thermostat and the Gateway Premium II.
      It was decided that the best solution was to return the product in exchange for the Gateway S32 which does not have this issue.

  90. Stefan Mühlbauer (verified owner)

  91. Daniel (verified owner)

  92. Matěj Kraus (verified owner)

  93. Maciej Piotrowicz (verified owner)

    Great device, easy installation.
    Every step described on the web.
    PS. Thanks for Haribo ?

    Image #1 from Maciej Piotrowicz
  94. Boris Š. (verified owner)

    Easy to connect and configure – just followed user guide 🙂

  95. Stefan Knierim (verified owner)

    Das Teil ist innerhalb von 15 min. an meiner Junkers Heizung installiert gewesen. Das Einbinden in Home Assistant war ein Kinderspiel. Einfach ein tolles Produkt zu einem unglaublichen Preis. Vielen Dank und viel Erfolg.

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