#!/usr/bin/env python
import serial
while 1:
	a=raw_input('enter command: ')
	if a=='on':
		a='1'
	elif a=='off':
		a='0'
	elif a=='end':
		break
	com=serial.Serial('/dev/tty.iap',baudrate=9600,bytesize=8,parity='N',stopbits=1,timeout=1)
	com.write(a)
	print com.readline()
	com.close()