ComTool.py

import socket
import os
import sys
from threading import Thread

class MessagePrinter(Thread):
    def __init__(self, sock):
        Thread.__init__(self)
        self._sock = sock

    def run(self):
        while(True):
            data, sender = sock.recvfrom(1024)
            print (data)

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
sock.bind(("0.0.0.0", 5000))

printer = MessagePrinter(sock)
printer.start()

while(True):
    msg = input("Introduceti mesajul: ")
    if msg == "ST":
        start_mesaj= [0x03, 0x01, 0xAA, 0x04, 0x31, 0x32, 0x43, 0x72, 0x02, 0xAB, 0x04, 0x31, 0x32, 0x43, 0x72, 0x03, 0xAC, 0x05, 0x31, 0x34, 0x11, 0x24, 0x54 ,0x04, 0xFF, 0x04, 0x31, 0x32, 0x43, 0x72, 0x07, 0xFF, 0x04, 0x13, 0x14, 0x41, 0x31, 0x08, 0xFF, 0x05, 0x31, 0x34, 0x11, 0x24, 0x54]
        sock.sendto(bytes(start_mesaj), ('255.255.255.255',5001))
    elif msg == "S":
        stop_mesaj = [0x02, 0xAA, 0xBB, 0xCC, 0xDD, 0x00]
        sock.sendto(bytes(stop_mesaj), ('255.255.255.255', 5001))
    else:
        sock.sendto(bytes(msg,"ascii"), ('255.255.255.255', 5001))