https://wiki.domoticz.com/index.php?action=history&feed=atom&title=EMS-bus-GatewayEMS-bus-Gateway - Revision history2026-09-19T00:05:00ZRevision history for this page on the wikiMediaWiki 1.46.0https://wiki.domoticz.com/index.php?title=EMS-bus-Gateway&diff=17601&oldid=prevWalter vl: /* Plugin installation */2022-11-09T07:54:21Z<p><span class="autocomment">Plugin installation</span></p>
<p><b>New page</b></p><div>Almost all Bosch brand boilers from the last 20 years or so use the same EMS bus interface to connect thermostats, solar/mixer modules etc to the boiler/heat pump.<br />
Depending on the brand and the protocol version, the bus is called EMS, EMS+, EMS2, ‘2-wire bus’ and Heatronic 3.<br />
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==EMS Bus Wi-Fi Gateway==<br />
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[[File:Gateway-integration.jpg]]<br />
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The EMS Bus Gateway is a small device that provides a link between the EMS bus and a home automation like Domoticz.<br />
Just plug in the device to the service jack on the boiler with the supplied jack cable and stick it to the side of the boiler (its magnetic).<br />
Or connect it directly to the thermostat wires.<br />
No additional cables are needed and everything is powered from the service jack or the thermostat wires itself.<br />
All Gateways connect via Wi-Fi to your home network.<br />
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The Gateway runs the EMS-ESP firmware that communicates via MQTT.<br />
When connected to an EMS boiler or heatpump and to a thermostat, solar module, mixer module you can read out many parameters like flow and return temperature and change for instance the setpoint of the thermostat.<br />
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For Domoticz there is a Python plugin.<br />
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==System compatibility==<br />
To check whether you EMS devices are supported see: *https://bbqkees-electronics.nl/ems-device-compatibility/.<br />
If its not in the list it may very well already be compatible and if not we can always add it to the ever growing database.<br />
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==Plugin installation==<br />
The plugin and its installation instructions can be found here: *https://github.com/bbqkees/ems-esp-domoticz-plugin<br />
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'''DECEMBER 2021 -> YOU DO NOT NEED THIS PLUGIN ANYMORE''' <br />
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Domoticz now natively supports the Home Assistant [[MQTT|MQTT Discovery]] protocol. The Gateway already supported this protocol. With a recent Domoticz version (late December 2021 and onwards) you can get all your EMS parameters into Domoticz without any further plugin. See [https://bbqkees-electronics.nl/wiki/gateway/domoticz-configuration.html HERE] for the instructions on how to add it to Domoticz. With EMS-ESP until v3.3 all parameters except thermostats are read only, in EMS-ESP v3.4 this will be changed so that all settable parameters are added automatically.<br />
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==Detailed information==<br />
There is a wiki with very detailed information on the bus and the Gateway: *https://bbqkees-electronics.nl/wiki<br />
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==Getting a Gateway==<br />
To purchase a Gateway check the website: *https://bbqkees-electronics.nl/</div>Walter vl