#!/usr/bin/env python
import RPi.GPIO as GPIO
import sys
import os
import time
import glob

GPIO.setmode(GPIO.BCM)
GPIO.setup(4, GPIO.OUT)

def relayon():
        GPIO.output(4, GPIO.HIGH)
       # time.sleep(60)
        #GPIO.output(4, GPIO.HIGH)
def relayoff():
        GPIO.output(4, GPIO.LOW)

def getRecentFile():
        if os.environ.get('OS','') == 'Windows_NT':
        ## Windows OS try min to find most recent
            return min(glob.iglob('/var/spool/gammu/inbox/*.txt'), key=os.path.getctime)
        else: return max(glob.iglob('/var/spool/gammu/inbox/*.txt'), key=os.path.getctime)
        ## will try and use linux max which should find most recent file
        ## both examples will search for in theory most recent file created in that directory
        ## /var/spool/gammu/inbox/
try:
    complete_filename=str(getRecentFile())
    ## complete_filename="/home/pi/proc1.py"
    sms_file=open(complete_filename,"r")
    message=sms_file.read(160)
    if (message.find("poweron")!= -1): (relayon)
    elif (message.find("poweroff") != -1): (relayoff)
        # GPIO.output(4, GPIO.LOW)
except KeyboardInterupt:
    print "\n"
finally: GPIO.cleanup()