MQTT (aka MQ Telemetry Transport) is a machine-to-machine or “Internet of Things” connectivity protocol on top of TCP/IP. It allows extremely lightweight publish/subscribe messaging transport.
Your first step to get MQTT and Home Assistant working is to choose a broker.
To integrate MQTT into Home Assistant, add the following section to your
configuration.yaml file. Keep in mind that the minimal setup will run with an embedded MQTT broker:
# Example configuration.yaml entry mqtt:
To connect to your own MQTT broker:
# Example configuration.yaml entry mqtt: broker: IP_ADDRESS_BROKER
The minimal setup uses the embedded MQTT broker, however a separate broker is advised for more stability.