https://blog.wongcw.com/2022/08/19/google-%e5%ae%a3%e5%b8%83%e6%98%8e%e5%b9%b48%e6%9c%88%e9%97%9c%e9%96%89%e5%85%b6iot-core%e6%9c%8d%e5%8b%99/