腾讯云，物联网开发平台产品，动态注册步骤

1. 下载后解压，qcloud_iot_mqtt_sign-master.zip

GitHub - tencentyun/qcloud_iot_mqtt_signContribute to tencentyun/qcloud_iot_mqtt_sign development by creating an account on GitHub.https://github.com/tencentyun/qcloud_iot_mqtt_sign

2. 按照readme文件修改文件，选择编译器，编译环境

3. 打开linux虚拟机，打开vim，进入，安装cmake

4. 执行bash cmake_build.sh

5. 进入out/bin，执行./qcloud-dynreg-sign product_id product_secretkey device_name

6. 复制生成的参数到apipost

 

{ "Response": { "Len": 53, "Payload": "b05ZCOCKKjDqQ+yVKergD2jGAnXjYcsGbEAOi8UB+4r6oxY6ZI+QiJmfLj9CBDDssrfLw6QRlLyfo+qyN1lH2A==", "RequestId": "f4d2d833-b2f9-466a-bd24-691750eb2f6f", "State": 1 } }

7. base64解码https://the-x.cn/base64/

8. 去掉空格回车http://www.esjson.com/delSpace.html

9. aes解密https://the-x.cn/cryptography/Aes.aspx

注意第四项是产品秘钥，第五项是16个0

结果中的psk就是设备秘钥