gateway::backend::mqtt I/O: Connection refused (os error 111)

ChirpStack (v4)
1

Hi I’m installing ChirpStack using the below docker compose:

services:
  chirpstack:
    image: chirpstack/chirpstack:4
    command: -c /etc/chirpstack
    restart: unless-stopped
    volumes:
      - /volume8/docker/chirpstack/config:/etc/chirpstack
    depends_on:
      - postgres
    environment:
      - REDIS_HOST=192.168.xxx.xxx
      - REDIS_PORT=xxx
      - POSTGRESQL_HOST=postgres
      - LOG_LEVEL=DEBUG
    ports:
      - "8080:8080"
    networks:
      - docker_network

  chirpstack-gateway-bridge-basicstation:
    image: chirpstack/chirpstack-gateway-bridge:4
    restart: unless-stopped
    command: -c /etc/chirpstack-gateway-bridge/chirpstack-gateway-bridge-basicstation-eu868.toml
    ports:
      - "3001:3001"
    volumes:
      - /volume8/docker/chirpstack/chirpstack-gateway-bridge/basicstation:/etc/chirpstack-gateway-bridge
    networks:
      - docker_network

  postgres:
...........
...........
...........

networks:
  docker_network:
    external: true

and these are the .toml configuration related to mqtt services:

chirpstack.toml
…
…

Configurazione BACKEND del gateway (obbligatoria)

[gateway.backend]
backend = “mqtt”

[gateway.backend.mqtt]
server = “tcp://mosquitto:1883”
client_id = “chirpstack_gateway_backend”

Aggiungere TEMPLATE per i topic (obbligatorio)

event_topic_template = “eu868/gateway/{{ .GatewayID }}/event/{{ .EventType }}”
state_topic_template = “eu868/gateway/{{ .GatewayID }}/state/{{ .StateType }}”
command_topic_template = “eu868/gateway/{{ .GatewayID }}/command/#”

Configurazione INTEGRAZIONE (opzionale)

[integration]
enabled = [“mqtt”]

[integration.mqtt]
server = “tcp://mosquitto:1883”
client_id = “chirpstack_integration”
json = true
event_topic_template = “application/{{application_id}}/device/{{dev_eui}}/event/{{event}}” # Template standard
command_topic_template = “application/{{application_id}}/device/{{dev_eui}}/command/{{command}}” # Template standard

chirpstack-gateway-bridge-basicstation-eu868.toml
…
…
…
[integration.mqtt.auth.generic]
server = “tcp://192.168.5.10:1773”
client_id = “chirpstack_bridge_basicstation”
username = “”
password = “”

[integration.mqtt]
event_topic_template=“eu868/gateway/{{ .GatewayID }}/event/{{ .EventType }}”
state_topic_template=“eu868/gateway/{{ .GatewayID }}/state/{{ .StateType }}”
command_topic_template=“eu868/gateway/{{ .GatewayID }}/command/#”

I am encountering a persistent “Connection refused” error within my ChirpStack container. The specific log entry is:

chirpstack::gateway::backend::mqtt: MQTT error, error: I/O: Connection refused (os error 111)

I’m using EMQX as my MQTT broker and everything is working well except the above error. In the EMQX dashboard, I can see two clients connected: chirpstack_integration and chirpstack_bridge_basicstation. However, I cannot see the chirpstack_gateway_backend client, which seems to be the one generating these errors.

2

What gateway are you using? Likely whatever “MQTT” backend it has is out of date with current Chirpstack. You will likely have to do UDP or basic station out of the gateway to your gateway bridge instead.

3

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