Python 套接字编程和 LED 接口(interface)

Question

我正在尝试用 python 编写套接字编程。每当客户端向服务器发送消息时，LED 应该开始闪烁。我在 Raspberry pi 上运行服务器程序，在 PC 上运行客户端。

这是在我的 Pi 上运行的服务器代码。

#!/usr/bin/python             # This is server.py file
import socket                 # Import socket module
import time
import RPi.GPIO as GPIO       # Import GPIO library
GPIO.setmode(GPIO.BOARD)      # Use board pin numbering
GPIO.setup(11, GPIO.OUT)      # Setup GPIO Pin 11 to OUT
GPIO.output(11,False)         # Init Led off

def led_blink():
    while 1:
        print "got msg"         # Debug msg
        GPIO.output(11,True)    # Turn on Led
        time.sleep(1)           # Wait for one second
        GPIO.output(11,False)   # Turn off Led
        time.sleep(1)           # Wait for one second
    GPIO.cleanup()

s = socket.socket()           # Create a socket object
host = "192.168.0.106"        # Get local machine name
port = 12345                  # Port
s.bind((host, port))          # Bind to the port
s.listen(5)                   # Now wait for client connection.
while True:
    c, addr = s.accept()       # Establish connection with client.
    print 'Got connection from', addr
    msg = c.recv(1024)
    msg1 = 10
    if msg == msg1:
        led_blink()
    print msg
    c.close()

这是在我的电脑上运行的客户端代码。

#!/usr/bin/python           # This is client.py file
import socket               # Import socket module
s = socket.socket()         # Create a socket object
host = "192.168.0.106" # Get local machine name
port = 12345                # port

s.connect((host, port))
s.send('10')
s.close  

我能够从客户端接收消息，但无法使 LED 闪烁。对不起，我是编码新手。我对硬件有很好的了解，但对软件却一无所知。请帮助我。

Answer 1

在您的 PC 或 Raspberry 上尝试此操作，然后进行相应的编辑:

#!/usr/bin/python             # This is server.py file
import socket                 # Import socket module

def led_blink(msg):
        print "got msg", msg         # Debug msg

s = socket.socket()           # Create a socket object
host = "127.0.0.1"        # Get local machine name
port = 12345                  # Port
s.bind((host, port))          # Bind to the port
s.listen(5)                   # Now wait for client connection.
print "Listening"
c, addr = s.accept()       # Establish connection with client.
while True:
    msg = c.recv(1024)
    print 'Got connection from', addr
    if msg == "Exit":
        break
    led_blink(msg)
c.close()

和:

#!/usr/bin/python           # This is client.py file
import socket, time               # Import socket module
s = socket.socket()         # Create a socket object
host = "127.0.0.1" # Get local machine name
port = 12345                # port
s.connect((host, port))
x=0
for x in range(10):
    s.send('Message_'+str(x))
    print x
    time.sleep(2)
s.send('Exit')
s.close  

请注意，我在同一台机器 127.0.0.1 上同时使用服务器和客户端，并删除了 GPIO 位，因为我没有它们可用。