Setting up HA, using a SLLZB-MR1U as coordinator; running latest firmware. I’ve been viewing Youtubes and reading countless articles and think I’m making progress but I have the following error and have no idea where to go next:

Are your MQTT connection login and password correct?
Do you have the MQTT add-on installed? (Assumption HAOS there)
There are 3 component to using z2m in haos;
- zigbee2mqtt addon itself, this communicates directly to the dongle and communicates to the mqtt broker
- the mqtt broker addon, this sits between z2m and ha, and relays the messages/topics
- the mqtt integration, this sits between ha and mqtt, and lets ha <> mqtt communicate
the error indicates that it can’t communicate with the mqtt broker, make sure it is installed and running
Thanks for the clear explanation of how this works! I had overlooked that I needed to add a login to the Mosquitto broker.
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