lot_manager/data_upload.py

import os
import subprocess
import time
import paho.mqtt.client as mqtt


def on_connect(client, userdata, flags, rc):
    global times
    if rc == 0:
        # print("连接成功，执行数据推送和本地存储")
        subprocess.Popen(['/usr/bin/bash /home/pi/lot_manager/bash/start_data_upload.sh'], shell=True)
        times = 3


def on_connect_fail(client, userdata):
    # print("失败，执行本地存储")
    subprocess.Popen(['/usr/bin/bash /home/pi/lot_manager/bash/stop_data_upload.sh'], shell=True)


times = 3
if __name__ == '__main__':
    while True:
        try:
            client = mqtt.Client(client_id=os.getenv('device_name'))
            client.username_pw_set("demo", "123456")
            # Specify callback function
            client.on_connect = on_connect
            client.on_connect_fail = on_connect_fail
            # Establish a connection
            client.connect('ceshi-mqtt.lihaink.cn', 1883)
            # Publish a message
            client.loop_forever()
        except Exception as e:
            print("等待5秒重新连接客户端")
            time.sleep(5)
            if times == 0:
                on_connect_fail(None, None)
            times -= 1