Python Code

import subprocess
import time
from Adafruit_CharLCDPlate import Adafruit_CharLCDPlate

lcd = Adafruit_CharLCDPlate()

while 1:
    lcd.clear()
    p = subprocess.Popen("ping -c 1 64.114.87.90", shell=True, stdout=subprocess.PIPE)
    out, err = p.communicate()
    if not err:
        r = out.split('\n') [4].split(', ')[2]
        if r == '0% packet loss':
            msg = "NAS Online\n"
        else:
            msg = 'NAS Offline\n'
    p = subprocess.Popen("df -h | awk 'NR==9{print $5}'", shell=True, stdout=subprocess.PIPE)
    out, err = p.communicate()
    if not err:
        msg += out.strip() + " space used"
    lcd.message(msg)
    lcd.backlight(lcd.TEAL)
    n = time.time()
while time.time() - n < 60:
    continue