我正在编写一个脚本,它将使用 paho-mqtt 记录具有不同凭据的多个设备。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,那么我会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,它就可以正常工作。但我想记录 on_connet 中的所有设备。我已经编写了脚本,但它仅适用于一台设备。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, userdata, message):
msg="message received",str(message.payload.decode("utf-8"))
print(msg)
def on_connect(client, userdata, flags, rc):
print("Connected with result code:"+str(rc))
client.subscribe('v3/+/devices/+/up')
def on_disconnect(client, userdata, rc):
pass
def on_publish(client, userdata, 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()
回应
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。提前致谢
最佳答案
你的问题出在这里:
while run:
client.loop_forever()
loop_forever()
是一个阻塞调用,仅当关联的客户端断开连接时才会返回:
This is a blocking form of the network loop and will not return until the client calls disconnect(). It automatically handles reconnecting. paho-mqtt
所以你的其他客户端永远不会被初始化/连接。您可能想使用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
关于python - 如何在同一个 paho-mqtt 脚本下运行多个设备,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/63445826/