Simple Micropython UDP echo server

_threaded-reply-to-empty-udp.py

import socket, _thread

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

server_address = '0.0.0.0'
server_port = 31337

sock_addr = socket.getaddrinfo(server_address, server_port)[0][-1]
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(sock_addr)

print(f'Listening on {server_address}:{server_port}')

def handle_client(payload, client_address):
  port = int.from_bytes(client_address[2:4], 'big')
  ip = '.'.join(str(b) for b in client_address[4:8])

  print(f"Received: '{payload.decode()}' from: {ip}:{port}")

  sock.sendto(payload, client_address)

while True:
  _thread.start_new_thread(handle_client, (sock.recvfrom(1024)))

reply-to-empty-udp.py

import socket

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

server_address = '0.0.0.0'
server_port = 31337

sock_addr = socket.getaddrinfo(server_address, server_port)[0][-1]
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(sock_addr)

print(f'Listening on {server_address}:{server_port}')

while True:
  payload, client_address = sock.recvfrom(1024)

  #This is for ipv4 (INET) only
  port = int.from_bytes(client_address[2:4], 'big')
  ip = '.'.join(str(b) for b in client_address[4:8])
  print(f"Received from: {ip}:{port}")

  sock.sendto(payload, client_address)