创建用户

在https://www.cloudmqtt.com/上创建一个帐户

转到右上角的控制面板

点击“创建”按钮

安装lib

sudo pip install paho-mqtt

注：不加·sudo可会有如下一些错误

Exception:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 353, in run
    wb.build(autobuilding=True)

运行python脚本

在树莓派上运行如下代码：

import paho.mqtt.client as mqtt
import time

data="Hello from Raspberry Pi!"
while True:
    print data
    try:
        client=mqtt.Client()
        #修改下一行中的用户名和密码
        client.username_pw_set("dspwoncw","3s9YYyRmL2l0")
        #修改下一行中的client_id
        client.connect("m11.cloudmqtt.com",16868,60)
        client.publish("pi",data)
        time.sleep(1)
    except KeyboardInterrupt:
        print("end")
        client.disconnect()