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MQTT Broker Instructions on how to setup a MQTT broker for Home Assistant. mqtt.png

The MQTT integration needs you to run an MQTT broker for Home Assistant to connect to.

Run your own

The most private option is running your own MQTT broker.

The recommended setup method is to use the Mosquitto MQTT broker add-on.

Neither ActiveMQ MQTT broker nor the RabbitMQ MQTT Plugin are supported, use a known working broker like Mosquitto instead. There are at least two issues with the ActiveMQ MQTT broker which break MQTT message retention. There is an issue with the RabbitMQ MQTT Plugin which breaks MQTT message retention.

Configuration

# Example configuration.yaml entry
mqtt:
  broker: 192.168.1.100

{% configuration %} broker: required: false description: The IP address or hostname of your MQTT broker, e.g., 192.168.1.32. type: string port: required: false description: The network port to connect to. Default is 1883. type: integer client_id: required: false description: The client ID that Home Assistant will use. Has to be unique on the server. Default is a randomly generated one. type: string keepalive: required: false description: The time in seconds between sending keep alive messages for this client. Default is 60. type: integer username: required: false description: The username to use with your MQTT broker. type: string password: required: false description: The corresponding password for the username to use with your MQTT broker. type: string protocol: required: false description: "Protocol to use: 3.1 or 3.1.1. By default it connects with 3.1.1 and falls back to 3.1 if server does not support 3.1.1." type: string certificate: required: false description: Path to the certificate file, e.g., /ssl/server.crt. type: string tls_insecure: required: false description: Set the verification of the server hostname in the server certificate. type: boolean default: false {% endconfiguration %}

If you are running a Mosquitto instance on a different server with proper SSL encryption using a service like Let's Encrypt you may have to set the certificate to the operating systems own .crt certificates file. In the instance of Ubuntu this would be certificate: /etc/ssl/certs/ca-certificates.crt

Public broker

The Mosquitto project runs a public broker. This is the easiest to set up, but there is no privacy as all messages are public. Use this only for testing purposes and not for real tracking of your devices or controlling your home.

mqtt:
  broker: test.mosquitto.org
  port: 1883 or 8883

  # Optional, replace port 1883 with following if you want encryption
  # (doesn't really matter because broker is public)
  port: 8883
  # Download certificate from https://test.mosquitto.org/ssl/mosquitto.org.crt
  certificate: /home/paulus/downloads/mosquitto.org.crt

If you experience an error message like Failed to connect due to exception: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed, then add certificate: auto to your broker configuration and restart Home Assistant.