在Django中写mqtt脚本并使用
Python环境下安装MQTT也很简单，需要注意的就是不要输错命令
在Python3环境下安装Python MQTT的命令是：
pip3 install paho-mqtt
使用Python MQTT
编写Python MQTT脚本
代码如下：
# 为了能在外部脚本中调用Django ORM模型，必须配置脚本环境变量，将脚本注册到Django的环境变量中 import os, sys import django # 第一个参数固定，第二个参数是工程名称.settings os.environ.setdefault('DJANGO_SETTING_MODULE', 'my_django.settings') django.setup() # 引入mqtt包 import paho.mqtt.client as mqtt # 使用独立线程运行 from threading import Thread from app名 import models import time import json # 建立mqtt连接 def on_connect(client, userdata, flag, rc): print("Connect with the result code " + str(rc)) client.subscribe('test/#', qos=2) # 接收、处理mqtt消息 def on_message(client, userdata, msg): out = str(msg.payload.decode('utf-8')) print(msg.topic) print(out) out = json.loads(out) # 收到消息后执行任务 if msg.topic == 'test/newdata': print(out) # mqtt客户端启动函数 def mqttfunction(): global client # 使用loop_start 可以避免阻塞Django进程，使用loop_forever()可能会阻塞系统进程 # client.loop_start() # client.loop_forever() 有掉线重连功能 client.loop_forever(retry_first_connection=True) client = mqtt.Client(client_id="test", clean_session=False) # 启动函数 def mqtt_run(): client.on_connect = on_connect client.on_message = on_message # 绑定 MQTT 服务器地址 broker = '192.168.1.88' # MQTT服务器的端口号 client.connect(broker, 1883, 62) client.username_pw_set('user', 'user') client.reconnect_delay_set(min_delay=1, max_delay=2000) # 启动 mqttthread = Thread(target=mqttfunction) mqttthread.start() # 启动 MQTT # mqtt_run() if __name__ == "__main__": mqtt_run()
在Django项目中启动脚本
在Django2.1下，只需要在 wsgi.py 中引入要执行的脚本文件，然后执行启动函数即可。
如：
from 存放MQTT脚本的模块 import 脚本名 # 假如脚本名是：mqtt_functions mqtt_functions.mqtt_run()
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在Django中使用MQTT的方法
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转载：https://3water.com/article/0MTM18OTI23LmEw
-------------------------------------------------------------------自己项目---------------------------------------------------------------------------------------------
用djnago 自定义命令去执行mqtt
getmqtt.py
from django.core.management.base import BaseCommand, CommandError # 引入mqtt包 import paho.mqtt.client as mqtt import datetime,json,time # 导入数据库模型 from polls.models import MqttMsg # 使用独立线程运行 from threading import Thread class Command(BaseCommand): help = 'get mqtt' def handle(self, *args, **options): print('getmqtt') # The callback for when the client receives a CONNACK response from the server. def on_connect(client, userdata, flags, rc): print("Connected with result code " + str(rc)) # Subscribing in on_connect() means that if we lose the connection and # reconnect then subscriptions will be renewed. client.subscribe("BOX/+/exxxnt/prxxx/pxx/ppi/#") # The callback for when a PUBLISH message is received from the server. def on_message(client, userdata, msg): # print(msg.topic + " " + str(msg.payload)) mqtt_topic = msg.topic.split('/') c_gateway_identifier = mqtt_topic[1] c_gateway_number = mqtt_topic[6] msg_payload = str(msg.payload) msg_payload_new = msg_payload[2:][:-1] aa = json.loads(msg_payload_new) # 13位时间戳转时间 tre_timeArray = time.localtime(aa['time'] / 1000) report_time = time.strftime("%Y-%m-%d %H:%M:%S", tre_timeArray) params = aa['params'] # 插入数据 user = MqttMsg( c_gateway_identifier=c_gateway_identifier, c_gateway_number=c_gateway_number, report_time=report_time, alarm_clear_command=params['alarm_clear_command'], box1_humidity=params['box1_humidity'],box1_temperature1=params['box1_temperature1'],box1_temperature2=params['box1_temperature2'], box2_humidity=params['box2_humidity'], box2_temperature1=params['box2_temperature1'], box2_temperature2=params['box2_temperature2'], box3_humidity=params['box3_humidity'], box3_temperature1=params['box3_temperature1'], box3_temperature2=params['box3_temperature2'], compressor_running_hour=params['compressor_running_hour'], compressor_running_minute=params['compressor_running_minute'], ice_plate1_temperature1=params['ice_plate1_temperature1'], ice_plate1_temperature2=params['ice_plate1_temperature2'], ice_plate1_temperature3=params['ice_plate1_temperature3'], ice_plate1_temperature4=params['ice_plate1_temperature4'], ice_plate2_temperature1=params['ice_plate2_temperature1'], ice_plate2_temperature2=params['ice_plate2_temperature2'], ice_plate2_temperature3=params['ice_plate2_temperature3'], ice_plate2_temperature4=params['ice_plate2_temperature4'], ice_plate3_temperature1=params['ice_plate3_temperature1'], ice_plate3_temperature2=params['ice_plate3_temperature2'], ice_plate3_temperature3=params['ice_plate3_temperature3'], ice_plate3_temperature4=params['ice_plate3_temperature4'], in_box_fan1=params['in_box_fan1'], in_box_fan2=params['in_box_fan2'], in_box_fan3=params['in_box_fan3'], door_magnetic_switch1=params['door_magnetic_switch1'], door_magnetic_switch2=params['door_magnetic_switch2'], door_magnetic_switch3=params['door_magnetic_switch3'], ice_board1_switch=params['ice_board1_switch'], ice_board2_switch=params['ice_board2_switch'], ice_board3_switch=params['ice_board3_switch'], liquid_supply_valve1=params['liquid_supply_valve1'], liquid_supply_valve2=params['liquid_supply_valve2'], liquid_supply_valve3=params['liquid_supply_valve3'], ) user.save() print('success') # print(msg_payload_new['params']) client = mqtt.Client() client.on_connect = on_connect client.on_message = on_message client.connect("inxxxce.cxxxe.com", 1xx, 60) client.username_pw_set('emxxxckend', 'fsxxx86n') # Blocking call that processes network traffic, dispatches callbacks and # handles reconnecting. # Other loop*() functions are available that give a threaded interface and a # manual interface. client.loop_forever()
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本地命令
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