Update your manually configured MQTT entities

An incoming change to defining manually configured MQTT entities might require you to change some lines of YAML in your configuration. MQTT entities will no longer be configured directly under the respective platform keys (e.g., fan, light, switch, etc) and will instead require the MQTT platform key.

If the last two sentences are leaving you confused, the following two code snippets should help you understand what needs to be done as of Home Assistant Core 2022.6. Currently, a manually configured MQTT entity might look like this:

switch:
  - platform: mqtt
    name: "Zigbee2MQTT - Main join"
    state_topic: "zigbee2mqtt/bridge/info"
    value_template: '{{ value_json.permit_join | lower }}'
    command_topic: "zigbee2mqtt/bridge/request/permit_join"
    payload_on: "true"
    payload_off: "false"

In the above example, I am using the switch platform key. As of Home Assistant 2022.6, this configuration is deprecated and will be removed in Home Assistant 2022.9. From now on, I will have to use the MQTT configuration key instead, and the example above will have to be switched to the following:

mqtt:
  switch:
    - name: "Zigbee2MQTT - Main join"
      state_topic: "zigbee2mqtt/bridge/info"
      value_template: '{{ value_json.permit_join | lower }}'
      command_topic: "zigbee2mqtt/bridge/request/permit_join"
      payload_on: "true"
      payload_off: "false"