首先约定好socket通信的端口号：7000
通过阿里服务器控制台打开对应端口

注意：端口必须要在控制台打开，在服务器里打开端口无效！！

服务器端：

ip地址要写为服务器的内网ip
收到的数据是byte数组，所以要用decode解码，也可以指定字符集解码，默认是utf-8

import socket
HOST = '服务器的内网ip'
PORT = 7000
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
#绑定socket
s.bind((HOST, PORT))
#开始监听
s.listen(1)
print('Listening at port:',PORT)
conn, addr = s.accept()
print('Connected by', addr)
while True:data = conn.recv(1024)data = data.decode()if not data:breakprint('Received message:', data)
conn.close()
s.close()

树莓派端：
注意ip地址写服务器公网ip

import socketHOST = '服务器公网ip' 
PORT = 7000
BUFSIZ =1024
ADDR = (HOST,PORT)tcpCliSock = socket(AF_INET,SOCK_STREAM)
tcpCliSock.connect(ADDR)
while True:data1 = input('>')#data = str(data)if not data1:breaktcpCliSock.send(data1.encode())data1 = tcpCliSock.recv(BUFSIZ)if not data1:breakprint(data1.decode('utf-8'))
tcpCliSock.close()