Loop not occurring using python socket

Question

I am using my server code on a raspberry pi and my client code on my laptop. I also off the firewall on my computer. After connecting to the server, I manage to run the loop for once from the client side by keying the word "data" and when I keyed in another command it just came out of the loop. If i key in Quit it says that it have an OS error98 address already in used. May I know how to keep the loop on going ? Below I is my client.py and server.py code.

Server.py code:

import socket
import numpy as np
import encodings

HOST = '192.168.1.65'  
PORT = 65432        # Port to listen on (non-privileged ports are > 1023)
def random_data():          # ANY DATA YOU WANT TO SEND WRITE YOUR SENSOR CODE HERE

    x1 = np.random.randint(0, 55, None)         # Dummy temperature
    y1 = np.random.randint(0, 45, None)         # Dummy humidigy
    my_sensor = "{},{}".format(x1,y1)
    return my_sensor                            # return data seperated by comma
def my_server():

    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        print("Server Started waiting for client to connect ")
        s.bind((HOST, PORT))
        s.listen(5)
        conn, addr = s.accept()

        with conn:
            print('Connected by', addr)
            while True:

                data = conn.recv(1024).decode('utf-8')

                if str(data) == "Data":

                    print("Ok Sending data ")

                    my_data = random_data()

                    x_encoded_data = my_data.encode('utf-8')

                    conn.sendall(x_encoded_data)

                elif  str(data) == "Quit":
                    print("shutting down server ")
                    break

                else:
                    pass


if __name__ == '__main__':
    while 1:
        my_server()

Client.py Code:

import socket
import threading
import time


HOST = '192.168.1.65'  # The server's hostname or IP address
PORT = 65432       # The port used by the server


def process_data_from_server(x):
    x1, y1 = x.split(",")
    return x1,y1

def my_client():
    threading.Timer(11, my_client).start()

    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        s.connect((HOST, PORT))

        my = input("Enter command ")

        my_inp = my.encode('utf-8')

        s.sendall(my_inp)

        data = s.recv(1024).decode('utf-8')

        x_temperature,y_humidity = process_data_from_server(data)

        print("Temperature {}".format(x_temperature))
        print("Humidity {}".format(y_humidity))

        s.close()
        time.sleep(5)


if __name__ == "__main__":
    while 1:
        my_client()

if it's not "DATA" try printing what you do get, regardless. Might help debug. — Paul Collingwood
– Paul Collingwood, Commented Sep 28, 2021 at 10:09
I tried other input and it shows me an error s.bind((HOST, PORT)) OSError: [Errno 98] Address already in use — Hello
– Hello, Commented Sep 28, 2021 at 10:28

Aiden Choi · Accepted Answer · 2021-09-28 12:17:58Z

1

    address already used

you need to use socket.setsockopt to set socket.SO_REUSEADDR in i think both client and server.py

 def my_server():
    
        # with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        print("Server Started waiting for client to connect ")
        s.bind((HOST, PORT))
        s.listen(5)
        conn, addr = s.accept()
    
        with conn:
            print('Connected by', addr)
            while True:
    
                data = conn.recv(1024).decode('utf-8')
                if str(data) == "Data":
                    ...

answered Sep 28, 2021 at 12:17

Aiden Choi

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