import socket


TCP_IP = '0.0.0.0'
TCP_PORT = 1720
BUFFER_SIZE = 20  # Normally 1024, but we want fast response

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print('starting Server at port 1720')
s.bind((TCP_IP, TCP_PORT))
s.listen(1)

while 1:
	conn, addr = s.accept()
	print ('Connection address:', addr)
	while 1:
		data = conn.recv(BUFFER_SIZE)
		if not data: break
		print ("received data:", data.decode())
		conn.send(data)  # echo

	conn.close()
	print( address, disconnnected)