After adding the mqtt discovery component, mqtt fails

Configuration
1

I am using hassio with the integreated mosquito broker, now I installed the zigbee2mqtt add-on, it works, sensors are publishing to topic zigbee2mqtt and zigbee2mqtt is announcing the sensors to topic homeassistant for discovery.
after adding

mqtt:
  discovery: true
  discovery_prefix: homeassistant

to configuration.yaml and restarting I get this errors:

Unable to prepare setup for platform mqtt.sensor: Unable to set up component.
Setup failed for mqtt: Integration failed to initialize.
Unable to start embedded MQTT broker
Error initializing MQTT server
Broker startup failed: [Errno 98] error while attempting to bind on address (‘0.0.0.0’, 1883): address in use

2

solved: i had to make sure when adding mqtt in Configuration -> Integrations -> MQTT Enable discovery is checked

no need to add

mqtt:
  discovery: true
  discovery_prefix: homeassistant
3

You also need to add an ACL as per the docs.

4

What is an ACL?

5

Access Control List.

1 Like
6

Thanks, MQTT permissions essentially. :slight_smile: