import telnetlib
import time
import sys

HOST = "localhost"
PORT = "6571"

tn = telnetlib.Telnet(HOST, PORT)

tn.read_until("READY")
#while True:
tn.write("H\n\r")
time.sleep(1)
tn.write("L\n\r")
time.sleep(1)
tn.close
exit()