Hangar door simulator

import socket
import time

'''
This simulates the operations of the hangar door TCP PLC actuator by listening to 127.0.0.1:5000 and replying to 
incoming queries with `opened` or `closed`
'''


def main():
    address = "127.0.0.1"
    port = 5000
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.bind((address, port))
    print("Simulating hangar TCP server on %s:%d" % (address, port))
    sock.listen()
    while True:
        conn, addr = sock.accept()
        print("connection established from", addr)
        while True:
            try:
                rx = conn.recv(512)
                if len(rx) > 0:
                    print(" ->", rx)
                    time.sleep(5)
                    response = b"OK"
                    if 'open' in str(rx).lower():
                        response = b"opened"
                    elif 'close' in str(rx).lower():
                        response = b"closed"
                    print(" <- " + response.decode("utf-8"))
                    conn.send(response)
                    conn.close()
                    print("Connection closed")
                    break
            except ConnectionAbortedError:
                print("Connection aborted")
                break


if __name__ == '__main__':
    main()