基于python的onenet物联网平台温度数据仿真
一、设计思路：软件仿真是利用MQTT协议模拟前端设备与OneNet平台进行通信，OneNet云平台利用MQTT协议下发指令。
二、相关代码
初始化：
BrokerHost = '183.230.40.39' # OneNET使用TCP方式连接时的主机地址
BrokerPort = 6002 # OneNET使用TCP方式连接时的主机端口号
DeviceId = 'xxxxxxxxx' # 设备ID
ProductId = 'xxxxxx' # 产品ID
APIKey = "xxxxxxxxxxxxxxxxx" # MasterAPIKey
headers = {'api-key': APIKey}
url_post = "https://api.heclouds.com/devices/" + DeviceId + "/datapoints" # 数据点
url_get = "https://api.heclouds.com/devices/" + DeviceId + "/datastreams" # 数据流MQTT连接结果：
def on_connect(client, userdata, flags, rc):
if rc != 0:
print("连接失败:" + mqtt.connack_string(rc))
return
print("***连接成功***")消息发送：
def MQTT_send():
Chang = random.uniform(-5, 15)
Temperature= 20+Chang
Temperature=round(Temperature, 2)
data = {
'datastreams': [
{
'id': 'Temperature', # id为数据流名称
'datapoints': [
{
'value': Temperature
}
]
}
]
}
jdata = json.dumps(data).encode("utf-8")
r = requests.post(url=url_post, headers=headers, data=jdata)
print("发送成功：", r.text)消息发送回调：
def on_publish(client, userdata, mid):
print("[on_publish] mid:" + str(mid))broker响应订阅请求时被调用：
def on_subscribe(client, userdata, mid, granted_qos):
print("***** Broker响应订阅请求*****")
print(granted_qos)当与代理断开连接时调用：
def on_disconnect(client, userdata,rc=0):
logging.debug("DisConnected result code "+str(rc))
client.loop_stop()从服务器接收发布消息时的回调：
def on_message(client, userdata, msg):
print("----------- 接收到消息-----------")
# print(msg.topic + ":" + msg.payload.decode("utf-8"))
print('接收到发布消息：'+msg.payload.decode("utf-8"))实现代码如下：
# -*- coding: utf-8 -*-
"""
@author: 浅笑醉红楼.([email protected])
"""
import paho.mqtt.client as mqtt
import json
import random
import time
import requests
import logging
BrokerHost = '183.230.40.39' # OneNET使用TCP方式连接时的主机地址
BrokerPort = 6002 # OneNET使用TCP方式连接时的主机端口号
DeviceId = 'xxxxxxxxx' # 设备ID
ProductId = 'xxxxxx' # 产品ID
APIKey = "xxxxxxxxxxxxxxxxx" # MasterAPIKey
header = {'api-key': APIKey}
url_post = "https://api.heclouds.com/devices/" + DeviceId + "/datapoints" # 数据点
url_get = "https://api.heclouds.com/devices/" + DeviceId + "/datastreams" # 数据流
# 传输数据,随机数模拟
def MQTT_send():
Chang = random.uniform(-5, 15)
Temperature= 20+Chang
Temperature=round(Temperature, 2)
data = {
'datastreams': [
{
'id': 'Temperature', # id为数据流名称
'datapoints': [
{
'value': Temperature
}
]
}
]
}
jdata = json.dumps(data).encode("utf-8")
r = requests.post(url=url_post, headers=header, data=jdata)
print("发送成功：", r.text)
def MQTT_get():
r = requests.get(url=url_get, headers=header)
print("返回成功：\n", r.text)
def on_connect(client, userdata, flags, rc):
if rc != 0:
print("连接失败:" + mqtt.connack_string(rc))
return
print("***连接成功***")
def on_message(client, userdata, msg):
print("---------- 接收到消息 ----------")
# print(msg.topic + ":" + msg.payload.decode("utf-8"))
print('接收到发布消息：'+msg.payload.decode("utf-8"))
def on_subscribe(client, userdata, mid, granted_qos):
print("***** Broker响应订阅请求*****")
print(granted_qos)
def on_publish(client, userdata, mid):
print("[on_publish] mid:" + str(mid))
def on_disconnect(client, userdata,rc=0):
logging.debug("DisConnected result code "+str(rc))
client.loop_stop()
if __name__ == "__main__":
client = mqtt.Client(client_id=DeviceId, protocol=mqtt.MQTTv311)
client.on_connect = on_connect
client.on_publish = on_publish
client.on_message = on_message
client.on_subscribe = on_subscribe
client.username_pw_set(username=ProductId, password=APIKey)
client.connect(host=BrokerHost, port=BrokerPort, keepalive=60)
# client.loop_forever()
while (True):
client.loop_start()
on_disconnect(client, client.username_pw_set)
MQTT_send()
time.sleep(2) # 等待两秒
MQTT_get()
t = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime())
print('数据上传成功:',t)