使用 Python3 接入阿里云物联网平台（原物联网套件）

阿里云官方提供的 DEMO里面没有Python接入 阿里云物联网平台（原物联网套件） 的例子，不便于我们在电脑端做虚拟终端的相关测试，本文介绍一种基于使用Python3、MQTT-TCP连接通信 接入阿里云物联网平台（原物联网套件）。

开发语言：Python3.5

开发环境：Ubutnu16.04

IDE：PyCharm Community Edition

通信协议：MQTT、TCP

参考资料：开源MQTT客户端参考、 MQTT协议

相关筹备：阿里云物联网平台（原物联网套件）、创建产品、创建Topic（data）

1. 新建文件夹AliYun_Iot，在此文件夹下新建Get_para.py、Sub_Client.py、Pub_Client.py。

2. 编辑Get_para.py，如下

#!/usr/bin/env python3.5
# -*- coding:utf-8 -*-


"""
file: Get_para.py
date: 20171111
author: S_L_zheng
function: return client_id, username, password.
"""

import time
import hmac
import hashlib
import math


class Get_para(object):

    def __init__(self, PK, DN, DS):
        self.ProductKey = PK
        self.DeviceName = DN
        self.DeviceSecret = DS

    def get_para(self):
        ProductKey = self.ProductKey
        ClientId = self.DeviceName
        DeviceName = self.DeviceName
        DeviceSecret = self.DeviceSecret

        signmethod = "hmacsha1"
        us = math.modf(time.time())[0]
        ms = int(round(us * 1000))
        timestamp = str(ms)
        data = "".join(("clientId", ClientId, "deviceName", DeviceName,
                        "productKey", ProductKey, "timestamp", timestamp))

        ret = hmac.new(bytes(DeviceSecret, encoding='utf-8'),
                       bytes(data, encoding='utf-8'),
                       hashlib.sha1).hexdigest()
        sign = ret

        client_id = "".join((ClientId,
                             "|securemode=3",
                             ",signmethod=", signmethod,
                             ",timestamp=", timestamp,
                             "|"))
        username = "".join((DeviceName, "&", ProductKey))
        password = sign
        return client_id, username, password

if __name__ == '__main__':
	instance = Get_para(PK='YurProductKey', DN='YourDeviceName', DS='YourDeviceSecret')
	client_id, username, password = instance.get_para()
	print('client_id:',client_id)
	print('username:', username)
	print('password:', password)
	 

3. 编辑Sub_Client.py，如下

#!/usr/bin/env python3.5
# -*- coding:utf-8 -*-


"""
file: Sub_Client.py
date: 20171111
author: S_L_zheng
function: Subscribe Topic.
"""


import paho.mqtt.client as mqtt
import Get_para

DeviceName = "YourDeviceName"
DeviceSecret = "YourDeviceSecret "
ProductKey = "YourProductKey "


res = Get_para.Get_para(PK=ProductKey, DN=DeviceName, DS=DeviceSecret)
paras = res.get_para()
client_id = paras[0]
username = paras[1]
password = paras[2]

strBroker = ProductKey + ".iot-as-mqtt.cn-shanghai.aliyuncs.com"
port = 1883

topic = ProductKey+'/'+DeviceName+'/'+'data'


def on_connect(mqttc, userdata, flags, rc):
    print("Connected with result code " + str(rc))
    mqttc.subscribe(topic)


def on_message(mqttc, userdata, msg):
    msgpayload = str(msg.payload, encoding='utf-8')
    print(msgpayload)


def on_subscribe(mqttc, userdata, mid, granted_qos):
    print('on_subscribe')


def on_publish(mqttc, userdata, mid):
    print('on_publish')


if __name__ == '__main__':
    mqttc = mqtt.Client(client_id)
    mqttc.username_pw_set(username, password)
    mqttc.on_connect = on_connect
    mqttc.on_message = on_message
    mqttc.on_subscribe = on_subscribe
    mqttc.on_publish = on_publish
    mqttc.connect(strBroker, port, 120)
    mqttc.loop_forever()

4. 编辑Pub_Client.py，如下

#!/usr/bin/env python3.5
# -*- coding:utf-8 -*-


"""
file: Pub_Client.py
date: 20171111
author: S_L_zheng
function: Publishi message to topic.
"""


import paho.mqtt.client as mqtt
import Get_para

DeviceName = "YourDeviceName"
DeviceSecret = "YourDeviceSecret"
ProductKey = "YourProductKey"


res = Get_para.Get_para(PK=ProductKey, DN=DeviceName, DS=DeviceSecret)
paras = res.get_para()
client_id = paras[0]
username = paras[1]
password = paras[2]

strBroker = ProductKey + ".iot-as-mqtt.cn-shanghai.aliyuncs.com"
port = 1883

topic = ProductKey+'/'+DeviceName+'/'+'data'


def on_connect(mqttc, userdata, flags, rc):
    print("Connected with result code " + str(rc))
    message = '{"weather":"28"}'  # must json
    mqttc.publish(topic, message, 1)


def on_message(mqttc, userdata, msg):
    msgpayload = str(msg.payload, encoding='utf-8')
    print(msgpayload)


def on_publish(mqttc, userdata, mid):
    print('on_publish')

if __name__ == '__main__':
    mqttc = mqtt.Client(client_id)
    mqttc.username_pw_set(username, password)

    mqttc.on_connect = on_connect
    mqttc.on_message = on_message
    mqttc.on_publish = on_publish

    mqttc.connect(strBroker, port, 120)
    mqttc.loop_forever()

 

5. 代码运行顺序

Get_para.py—Sub_Client.py—Pub_Client.py