Problems to connect to MQTT-Broker

[Burki24]

I tried to connect to my MQTT-Broker, it connects, but it still get no informations:

[08:03:24.373] [Matterbridge zigbee2mqtt plugin] The plugin did not receive zigbee2mqtt bridge state. Check if zigbee2mqtt is running and connected to the MQTT broker.
[08:03:24.373] [Matterbridge zigbee2mqtt plugin] The plugin did not receive zigbee2mqtt bridge info. Check if zigbee2mqtt is running and connected to the MQTT broker.
[08:03:24.373] [Matterbridge zigbee2mqtt plugin] The plugin did not receive zigbee2mqtt bridge devices/groups. Check if zigbee2mqtt is running and connected to the MQTT broker.
[08:03:24.374] [Matterbridge] Failed to start plugin matterbridge-zigbee2mqtt: Error: The plugin did not receive zigbee2mqtt bridge state or info or devices/groups. Check if zigbee2mqtt is running and connected to the MQTT broker.
[08:03:25.210] [Matterbridge] The plugin matterbridge-zigbee2mqtt is in error state.
[08:03:25.211] [Matterbridge] The bridge will not start until the problem is solved to prevent the controllers from deleting all registered devices.
[08:03:25.212] [Matterbridge] If you want to start the bridge disable the plugin in error state and restart.
[08:04:09.369] [Zigbee2MQTT] Error connecting to mqtt://192.168.178.6:1025: connack timeout
[08:04:09.370] [Matterbridge zigbee2mqtt plugin] MQTT broker at 192.168.178.6:1025 error: Error: connack timeout Error: connack timeout
    at Timeout._onTimeout (/usr/lib/node_modules/matterbridge-zigbee2mqtt/node_modules/mqtt/build/lib/client.js:310:32)

My configuration:

{
  "name": "matterbridge-zigbee2mqtt",
  "type": "DynamicPlatform",
  "host": "192.168.178.6",
  "username": "",
  "password": "",
  "port": 1025,
  "topic": "zigbee2mqtt",
  "blackList": [],
  "whiteList": [],
  "switchList": [],
  "lightList": [],
  "outletList": [],
  "featureBlackList": [],
  "deviceFeatureBlackList": {},
  "debug": false,
  "unregisterOnShutdown": false
}

My Zigbee2MQTT-Configuration:

mqtt:
  base_topic: zigbee2mqtt
  server: mqtt://192.168.178.6:1025
  keepalive: 60
  reject_unauthorized: false
  version: 4
  include_device_information: true

The Broker isn't running on the same PI as the Matterbridge. Zigbee2MQTT and Matterbridge including the matterbridge-zigbee2mqtt Plugin are running on the same PI as zigbee2MQTT. Any idea to fix this?

Thanks in advance Burkhard

[Luligu]

Hi, is your zigbee2mqtt connecting correctly to the broker? What broker are you using? Con you send me the mosquitto.conf? Did you try using the usual and default port 1883 ?

[Burki24]

Sorry, I was on traveling, So I can't answer. Is it possible, that you have fixed the minimum MQTT-Protokoll version to 5?

Our MQTT-server on Symcon accept only up to version 4 of MQTT. Will it be possible to make the MQTT-protokoll V changeable?

THanks and greetz Burkhard