客户端是否必须断开与服务器的连接才能让另一个客户端连接? Python 套接字
我正在尝试连接到传感器 #1(该传感器具有放大器,您可以通过 TCP/IP 进行通信),该传感器位于我的笔记本电脑和 PLC 所在的网络上。我已经成功连接到传感器 #2 & 3 在 PLC 未向其发送请求的机器上,但我无法从与 PLC 主动通信的传感器 #1 获得响应。连接到服务器时是否需要断开与服务器的连接,以便另一个客户端连接到它并发出请求?我附上了一个示例程序,用于验证我与每个传感器的连接是否成功,但我与传感器 #1 的连接从未成功,因为它从未响应
import socket
import time
import sys
client1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client3 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client1.connect(('192.168.3.22', 8500)) #Sensor 2
client2.connect(('192.168.3.23', 8500)) #Sensor 3
client3.connect(('192.168.3.21', 8500)) #Sensor 1
print(client1)
print(client2)
print(client3)
status_result_reading="RT\r"
client1.send(bytes(status_result_reading,'ascii'))
client2.send(bytes(status_result_reading,'ascii'))
client3.send(bytes(status_result_reading,'ascii'))
time.sleep(.2)
msg1 = client1.recv(200)
msg2 = client2.recv(200)
#msg3 = client3.recv(200)
#print(msg1.decode('ascii')+'\t'+msg2.decode('ascii')+'\t'+msg3.decode('ascii'))
print(msg1.decode('ascii')+'\t'+msg2.decode('ascii'))
#Disconnect from the robot and close the socket object
client1.close()
client2.close()
client3.close()
print('close')
sys.exit()
。
I am trying to connect to sensor #1(the sensor has amplifier that you can communicate with via tcp/ip) that is on the network that both my laptop and the PLC are on. I have already successfully connected to sensors #2 & 3 on the machine which the PLC is not sending requests to but I cannot get a response from sensor #1 which the PLC is actively communicating with. Is it necessary when connecting to a server that you need to disconnect from it in order for another client to connect to it and make a request? I have attached a sample program I made to verify whether my connections to each sensor are successful but my connection to sensor #1 is never successful as it never responds
import socket
import time
import sys
client1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client3 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client1.connect(('192.168.3.22', 8500)) #Sensor 2
client2.connect(('192.168.3.23', 8500)) #Sensor 3
client3.connect(('192.168.3.21', 8500)) #Sensor 1
print(client1)
print(client2)
print(client3)
status_result_reading="RT\r"
client1.send(bytes(status_result_reading,'ascii'))
client2.send(bytes(status_result_reading,'ascii'))
client3.send(bytes(status_result_reading,'ascii'))
time.sleep(.2)
msg1 = client1.recv(200)
msg2 = client2.recv(200)
#msg3 = client3.recv(200)
#print(msg1.decode('ascii')+'\t'+msg2.decode('ascii')+'\t'+msg3.decode('ascii'))
print(msg1.decode('ascii')+'\t'+msg2.decode('ascii'))
#Disconnect from the robot and close the socket object
client1.close()
client2.close()
client3.close()
print('close')
sys.exit()
.
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