mqtt
python——paho-mqtt使用
https://blog.csdn.net/csdnhuaong/article/details/79595123
Python paho-mqtt 模块使用和API分析
https://blog.csdn.net/weixin_41656968/article/details/80848542#4connect
如何简单地理解Python中的if name == '__main__'
https://blog.csdn.net/yjk13703623757/article/details/77918633
mosquitto安装、配置、测试、paho.mqtt-spy安装
https://my.oschina.net/hhjian/blog/1550460