Send UDP broadcast and read replies from all clients

broadcaster.py

# Send UDP broadcast and read reply
# Edited from
# https://gist.github.com/ninedraft/7c47282f8b53ac015c1e326fffb664b5

import socket
import time
import binascii
import _thread as thread


PORT = 37020

server = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
server.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
server.settimeout(1)

def receive():
    while True:
        try:
            data, addr = server.recvfrom(1024)
            print(f'GET {data} FROM {addr}')
        except Exception:
            pass


thread.start_new_thread(receive, ())

iid = 0
while True:
    msg = f'{iid}'.encode()
    iid += 1
    print(f'SEND {msg}')
    try:
        server.sendto(msg, ('<broadcast>', PORT))
    except Exception as e:
        print(f'Ignore send error {e}')

    time.sleep(1)

Clients are actually UDP server listening on the broadcasting port:

import socket
import time
import binascii

UDP_IP = "0.0.0.0"
UDP_PORT = 37020

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind((UDP_IP, UDP_PORT))


while True:
    data, addr = sock.recvfrom(1024) # buffer size is 1024 bytes
    msg = data.decode('utf8')
    # msg = binascii.hexlify(data)
    print(f"RECV {msg} FROM {addr}")
    sent = sock.sendto(msg.encode(), addr)