Raspberry Pi蓝牙连接拒绝Err111

Question

我试图在两个树莓派之间获得套接字连接。一个是客户端，另一个将返回客户端发送回客户端的任何内容。但是，当我执行它时，它返回客户端无法连接到服务器并在线路上停止＆＃34; s.connect（（serverMACAddress，port））＆＃34;。

在这一天工作了一整天，没有任何地方，任何帮助表示赞赏。

这是客户端代码

import os
import platform
import socket
import sys
import json

def errorinput():
    print("Server.py:")
    print("       python3 ./client.py -a pull <query expressions>")
    sys.exit(1)

def main():
    #check if the arg is in right format
    if len(sys.argv)<=1:
        errorinput()
    elif sys.argv[1] != "-a" :
        errorinput()
    elif len(sys.argv) >= 3:
        if sys.argv[2] != "pull":
            if sys.argv[3] != "-s" or sys.argv[5] != "-m":
                errorinput()
        else:
            if len(sys.argv) !=4:
                errorinput()
    else:
        errorinput()

    #establish connection via bluetooth
    serverMACAddress = 'xx:xx:xx:xx:xx:xx'
    port = 3
    size = 1024
    s = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_STREAM, socket.BTPROTO_RFCOMM)
    s.connect((serverMACAddress,port))
    data = "100"     #send "100" to the server side as a test string
    s.send (data)
    receiveddata = s.recv(size)
    s.close()
    print (receiveddata)        

if __name__ == "__main__":
    main()

这里是服务器端代码（返回收到回客户端的任何消息）

import socket
import sys
import time

def main():
    hostMACAddress = 'B8:27:EB:AA:49:DF'
    port = 3
    backlog = 5
    size = 1024
    s = None

    try:
        # Create a Bluetooth socket
        s = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_STREAM, socket.BTPROTO_RFCOMM)
        # Bind the socket to the port
        server_address = (hostMACAddress, port)
        s.bind(server_address)
        s.listen(backlog)

    except s.error as e:
        if s:
            s.close()
        print("Error: Cannot open socket: " + str(e))
        sys.exit(1)
    while True:
        print('waiting for message')
        client, client_address = s.accept()
        data = s.recv(size)
        if data:
            client.send(data)
            client.close()

if __name__ == "__main__":
    main()