SmartLight_Demo_2019-1-28

代码说明：

说明：  基于STM32和W5500 的阿里云平台MQTT连接，内置了HMAC-SHA1算法，可以直接填写阿里云物联网平台的三个参数，程序直接生成域名、账户名、密码以及Topic。软件还包含基于Cjson的json构建与解析。(Based on STM32 and W5500, the MQTT connection of Aliyun platform is built-in with HMAC-SHA1 algorithm, which can fill in three parameters of Aliyun Internet of Things platform directly. The program generates domain name, account name, password and Topic directly. The software also includes JSON construction and parsing based on Cjson.)