如何在相同的paho-mqtt脚本下运行多设备

如何解决如何在相同的paho-mqtt脚本下运行多设备

我正在编写一个脚本，它将使用paho-mqtt记录多个具有不同凭据的设备。所有客户端都在相同的地址和相同的端口上运行。如果我更改用户名并通过，那么我将根据凭据获得不同的提要。如果我为不同的设备编写不同的脚本，则效果很好。但是我想在on_connet中记录所有设备。我已经编写了脚本，但仅适用于一台设备。这是脚本：

import paho.mqtt.client as mqtt
import time,json,threading,logging,ssl 

clients=[
   {"ursername":"username1","password": 'password1'},{"ursername":"username2","password":'password2'},{"ursername":"username3","password":'password3'}
]
nclients=len(clients)
run = True

def Create_connections():
   for i in range(nclients):
      t=int(time.time())
      client_id = "client" + str(t)
      client = mqtt.Client(client_id)
      
      username = credentials[i]["ursername"]
      password = credentials[i]["password"]
      
      client.on_log=on_log
      client.on_connect = on_connect
      client.on_subscribe=on_subscribe
      client.on_message = on_message
      client.on_disconnect = on_disconnect
      print("connecting to broker")
      
      client.tls_set("CXXXXX.crt",tls_version=ssl.PROTOCOL_TLSv1_2)
      client.tls_insecure_set(True)
      client.username_pw_set(username,password)
      client.loop_start()
      client.connect("XXXXX",XXXX,XX)
      print("Loop pass ")


def on_log(client,userdata,level,buf):
   print("message:" + str(buf))
   print("userdata:" + str(userdata))

   
def on_message(client,message):
   msg="message received",str(message.payload.decode("utf-8"))
   print(msg)

def on_connect(client,flags,rc):
   print("Connected with result code:"+str(rc))
   client.subscribe('v3/+/devices/+/up')


def on_disconnect(client,rc):
   pass

def on_publish(client,mid):
   print("mid: " + str(mid) + '\n')

def on_subscribe(mosq,obj,mid,granted_qos):
    print("Subscribed: " + str(mid) + " " + str(granted_qos))

mqtt.Client.connected_flag=False
no_threads=threading.active_count()
print("current threads =",no_threads)
print("Creating  Connections ",nclients," clients")

   
Create_connections()

响应

current threads = 1
Creating  Connections  2  clients
____________________________________________________________________________
client01597648398
<paho.mqtt.client.Client object at 0x7f73c0a5b1d0>
username1
connecting to broker
message:Sending CONNECT (u1,p1,wr0,wq0,wf0,c1,k60) client_id=b'client01597648398'
userdata:None
message:Received CONNACK (0,0)
userdata:None
Connected with result code:0
message:Sending SUBSCRIBE (d0,m1) [(b'XX/+/devices/+/XX',0)]
userdata:None
message:Received SUBACK
userdata:None
Subscribed: 1 (0,)
message:Sending PINGREQ
userdata:None
message:Received PINGRESP
userdata:None

任何帮助将不胜感激。预先感谢

解决方法

您的问题就在这里

while run:
    client.loop_forever()

loop_forever()是一个阻止呼叫，仅当关联的客户端断开连接时才会返回：

这是网络环路的阻塞形式，只有在客户端调用断开连接（）时才会返回。它会自动处理重新连接。 paho-mqtt

因此，您的其他客户端永远不会初始化/连接。您可能想改用loop_start-这将使用一个单独的线程来处理每个客户端的通信：

def Create_connections():
   for i in range(nclients):
      # ...
      client.loop_start()
      client.connect("XXXXXXXXXX",XXXX,XX)

# ...
Create_connections()

while run:
   pass