树莓派与PC端在局域网内运用python实现即时通讯

电脑和树莓派在同一局域网内，先在电脑和树莓派创建python运行环境，然后在树莓派中用python运行rpi.py；在电脑上运行computer.py；电脑上输入字符即可在树莓派上即时显示！

rpi.py

#coding:utf-8
#import necessary package
import socket
import time
import sys

HOST_IP = "192.168.31.151" #树莓派的IP地址
HOST_PORT = 8888
print("Starting socket: TCP...")
#1.create socket object:socket=socket.socket(family,type)
socket_tcp = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print("TCP server listen @ %s:%d!" %(HOST_IP, HOST_PORT) )
host_addr = (HOST_IP, HOST_PORT)
#2.bind socket to addr:socket.bind(address)
socket_tcp.bind(host_addr)
#3.listen connection request:socket.listen(backlog)
socket_tcp.listen(1)
#4.waite for client:connection,address=socket.accept()
socket_con, (client_ip, client_port) = socket_tcp.accept()
print("Connection accepted from %s." %client_ip)
socket_con.send("Welcome to RPi TCP server!")

print("Receiving package...")

###主循环
while True:
 try:
  data=socket_con.recv(512)
  if len(data)>0:
   print("Received:%s"%data)
   socket_con.send(data)
   time.sleep(1)
   continue
 except Exception:
   socket_tcp.close()
   sys.exit(1)

computer.py

import socket
import time
import sys

SERVER_IP = "192.168.31.151" #树莓派的IP地址
SERVER_PORT = 8888

print("Starting socket: TCP...")
server_addr = (SERVER_IP, SERVER_PORT)
socket_tcp = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

while True:
 try:
  print("Connecting to server @ %s:%d..." %(SERVER_IP, SERVER_PORT))
  socket_tcp.connect(server_addr)
  break
 except Exception:
  print("Can't connect to server,try it latter!")
  time.sleep(1)
  continue
print("Please input:")
while True:
 try:
  data = socket_tcp.recv(512)
  if len(data)>0:
   print("Received: %s" % data)
   command=raw_input()
   socket_tcp.send(command)
   time.sleep(1)
   continue
 except Exception:
  socket_tcp.close()
  socket_tcp=None
  sys.exit(1)

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