經由MQTT來與Home Assistant來溝通

把下面命令，放到configurations.yaml中。

light:
  - platform: mqtt
    name: "bathroom_secondary_light"
    state_topic: "smartthings/Bathroom Secondary Light/switch"
    command_topic: "smartthings/Bathroom Secondary Light/switch"
    payload_on: "on"
    payload_off: "off"
    retain: true

存檔後重新啟動

使用MQTTBOX來進行測試