Eclipse Paho MQTT Python Client 使用手册
    https://www.cooooder.com/archives/20210303

Python 实现AES加密
    https://zhuanlan.zhihu.com/p/261694311

python实现AES加密解密
    https://blog.csdn.net/chouzhou9701/article/details/122019967

使用python time()方法
    http://www.py.cn/jishu/jichu/20424.html

python 线程定时器Timer
    https://zhuanlan.zhihu.com/p/91412537

浅谈Python的格式化输出
    https://www.jb51.net/article/225609.htm

Python Request库入门
    https://www.jianshu.com/p/d78982126318

Python JSON 
    https://www.runoob.com/python/python-json.html

Python random() 函数 
    https://www.runoob.com/python/func-number-random.html