MQTT Publish service

The MQTT component will register the service publish which allows publishing messages to MQTT topics. There are two ways of specifying your payload. You can either use payload to hard-code a payload or use payload_template to specify a template that will be rendered to generate the payload.

{
  "topic": "home-assistant/light/1/command",
  "payload": "on"
}

{
  "topic": "home-assistant/light/1/state",
  "payload_template": "{{ states('device_tracker.paulus') }}"
}