lot_manager/ceshi.py

import serial
import time
import struct
import json
import paho.mqtt.client as mqtt

from api import add
from db.models.log_data_model import LOT_DATA

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 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 stop_data_upload.sh'], shell=True)


times = 3
if __name__ == '__main__':
    while True:
        try:
            client = mqtt.Client()
            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('127.0.0.1', 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:
                times -= 1
                on_connect_fail(None, None)