Luxtronik Broadcast detection

broadcast.py

import struct
import socket
import time

def searchHeatpumps(own_ip, brdcast):
    """Multicast shout out for luxtronik heatpumps."""

    for p in (4444, 47808):
        server = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
        server.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
        server.bind(("", p))
        server.settimeout(2)

        # send wired brodcast packet
        data = "2000;111;1;\u0000".encode()
        server.sendto(data, (brdcast, p))

        while True:
            try:
                res, con = server.recvfrom(1024)
                # if we receive what we just sent, continue
                if con[0] == own_ip:
                    continue
                # if the response starts with the magic nonsense
                if res.startswith(b"2500;111"):
                    res = res.split(b";")
                    return (con[0], int(res[2]))
                # if not, continue
                else:
                    continue
            # if the timout triggers, go on an use the other broadcast port
            except socket.timeout:
                break

IP = "192.168.178.15"
BROADCAST = "192.168.178.255"
                
print(searchHeatpumps(IP, BROADCAST))