import socket
import threading

HOST = '0.0.0.0'
PORT = 24081
BUFFER_SIZE = 1024

def udpServer():
  s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  s.bind((HOST, PORT))
  while True:
    data = s.recvfrom(BUFFER_SIZE)
    if data:
        print('Client to Server: ' , data)
        s.sendto(data[0].upper(), data[1])
  s.close()

thread = threading.Thread(target=udpServer)
thread.start()
print ("running...")