基于开源MQTT自主接入阿里云IoT平台（Python）

本文由 GXIC 作者 wongxmig 完成，欢迎关注 IoT 开发者社区。

1. 准备工作

1.1 注册阿里云账号

使用个人淘宝账号或手机号，开通阿里云账号，并通过__实名认证(可以用支付宝认证)__

1.2 免费开通IoT物联网套件

产品官网 https://www.aliyun.com/product/iot

1.3 软件环境

__python2__安装：https://www.python.org/downloads/
编辑器 sublimeText/nodepad++/vscode

2. 开发步骤

2.1 云端开发

1) 创建高级版产品

2) 功能定义，产品物模型添加属性

添加产品属性定义

物模型对应属性上报topic

/sys/替换为productKey/替换为deviceName/thing/event/property/post

物模型对应的属性上报payload

{
    id: 123452452,
    params: {
        temperature: 26.2,
        humidity: 60.4
    },
    method: "thing.event.property.post"
}

3) 设备管理>注册设备，获得身份三元组

2.2 设备端开发

我们以python2程序来模拟设备，建立连接，上报数据。

1. 创建文件夹 aliyun-iot-demo-python
2. pip install aliyun-python-sdk-iot-client
3. 创建thermometer.py文件，添加内容

2) 下载安装SDK

在aliyun-iot-demo-python文件夹下，执行命令

$ pip install aliyun-python-sdk-iot-client

3) 应用程序目录结构

4) 模拟设备thermometer.js代码

# -*- coding: utf-8 -*-
import aliyunsdkiotclient.AliyunIotMqttClient as iot
import json
import multiprocessing
import time
import random

options = {
    'productKey':'你的productKey',
    'deviceName':'你的deviceName',
    'deviceSecret':'你的deviceSecret',
    'port':1883,
    'host':'iot-as-mqtt.cn-shanghai.aliyuncs.com'
}


host = options['productKey'] + '.' + options['host']

# The callback for when a PUBLISH message is received from the server.
def on_message(client, userdata, msg):
    #topic = '/' + productKey + '/' + deviceName + '/update'
    print(msg.payload)
    
def on_connect(client, userdata, flags_dict, rc):
    print("Connected with result code " + str(rc))
    
def on_disconnect(client, userdata, flags_dict, rc):
    print("Disconnected.")

def worker(client):
    topic = '/sys/'+options['productKey']+'/'+options['deviceName']+'/thing/event/property/post'
    while True:
        time.sleep(5)
        payload_json = {
            'id': int(time.time()),
            'params': {
                'temperature': random.randint(20, 30),
                'humidity': random.randint(40, 50)
            },
            'method': "thing.event.property.post"
            }
        print('send data to iot server: ' + str(payload_json))        
        client.publish(topic, payload=str(payload_json))
        

if __name__ == '__main__':
    client = iot.getAliyunIotMqttClient(options['productKey'], options['deviceName'], options['deviceSecret'], secure_mode=3)
    client.on_connect = on_connect
    client.connect(host=host, port=options['port'], keepalive=60)

    p = multiprocessing.Process(target=worker, args=(client,))
    p.start()
    client.loop_forever()

3. 启动运行

3.1 设备启动

$ python thermometer.py

3.2 云端查看设备运行状态

download: aliyun-iot-demo-python.zip