import asyncio
import socket
import logging
logging.basicConfig(level=logging.DEBUG)

class Prot(asyncio.DatagramProtocol):
    def __init__(self):
        super().__init__()
    def error_received(self, exc):
        logging.exception('error_received', exc_info=exc)
    def datagram_received(self, data, addr):
        print(f'{addr=} {data=}')

async def amain():
    loop = asyncio.get_event_loop()
    trsp, _ = await loop.create_datagram_endpoint(
        Prot, local_addr=('::', 11111),
        family=socket.AF_INET6, proto=socket.IPPROTO_UDP)

    while True:
        sender_sock = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
        sender_sock.sendto(b'test', ('::1', 11111, 0, 0))
        await asyncio.sleep(1)

def main():
    asyncio.run(amain(), debug=True)

if __name__ == '__main__':
    main()