Adding Zigbee2MQTT after MercedesMe connection to OpenWB wallbox

[shesse (Stefan Heße)]

I configured the MercedesMe component which pushes State of charge information to my OpenWB wallbox via MQTT. This requires (if a am correct) the connection of MQTT to the MQTT server on the OpenWB wallbox.

Now i want to add Zigbee2MQTT to this installation, but it is not working. The Zigbee devices are found, but then do not appear in the HA devices list.
My guess is this has something to do with the MQTT connection to the OpenWB wallbox.
How can i configure MQTT and/or Mosquitto so that both (Mercedes Me and Zigbee devices via Zigbee2MQTT) is possible?

[francisp (Francis)]

Do you see your Zigbee devices in mqtt explorer ?

MQTT Explorer

[shesse (Stefan Heße)]

Sorry, but i am really a beginner. I found MQTT explorer and started it on my windows PC, but do not know how to use it.
I can connect to the HomeAssistant and can see this:

[francisp (Francis)]

Seems the Zigbee devices are present. How did you install Zigbee2MQTT ?

@shesse

the MQTT connection to the OpenWB wallbox.

homeassistant.fritz.box is the OpenWB wallbox ?

[shesse (Stefan Heße)]

No, that is the Home Assistant machine.
I can connect to openwb.fritz.box too and it looks pretty similar:

[francisp (Francis)]

You can only have 1 mqtt broker in HA. If your OpenWB wallbox is connected now to HA, I suggest you connect Zigbee2MQTT to your OpenWB wallbox.

[shesse (Stefan Heße)]

What do you mean by “your OpenWB wallbox is connected to HA”?
I entered the IP-Adress of the wallbox to the MQTT integration in Home Assisstant.
I can’t do anything on my OpenWB wallbox as I do not have admin access to it.
Can i do something on the HA to get this fixed?

[francisp (Francis)]

@shesse

“your OpenWB wallbox is connected to HA”?

@shesse

I entered the IP-Adress of the wallbox to the MQTT integration in Home Assisstant.

So yes

So, in Zigbee2MQTT, enter the IP-address and the user/password from your OpenWB Wallbox as mqtt server, and you should see your Zigbee devices in HA.

[shesse (Stefan Heße)]

Do you mean like this?

Correction: Instead of “homeassistant.fritz.box” i added “openwb.fritz.box”

Is there any other solution to avoid pushing data to the wallbox?

[francisp (Francis)]

in mqtt :

server: mqtt://openwb.fritz.box:1883
user : your openwb user
password: your openwb password

@shesse

Is there any other solution to avoid pushing data to the wallbox?

yes there is, but that is the easiest solution

Other solution is to reconfigure the mqtt integration to use homeassistant.fritz.box, and to setup an mqtt bridge to openwb.fritz.box, but that is really complicated with the mosquitto add-on.

Mosquitto MQTT Bridge-Usage and Configuration

Instruction manual. Configuring the MQTT bridge on the Mosquito broker addon

Example of configuring the MQTT bridge with the Mosquito broker add-on version 6.0.1. The bridge needs to be deployed on one machine that will send and receive messages, and on the other machine we will allow access for the first machine. And so. it is done as follows. 1) Settings of the Mosquitto broker addon on the first machine with Home Assistant On the first machine, in the share folder, we create a mosquito folder and create a mosquito.conf file inside. In this file, we insert the code …

[shesse (Stefan Heße)]

Thank you so much for your help. By using the openWB as MQTT server everything is working now.
I will think about reconfigure the Mosquitto as bridge, but for now everything is working fine.