#!/usr/bin/env python3
# Control relay using WiFi.
#  (c) 2018 Bradley Knockel

# Usage:  ./relayWiFi.py 1   <-- warning: will leave pin in output mode!
#         ./relayWiFi.py 0
# Either SSH into the Pi and call this function,
#   or have /var/www/html/index.php run this according to $_GET["state"]
#   using http://raspberrypi.local/?state=true



relayPin = 21
# or pin that controls the transistor that controls a relay


import sys
if len(sys.argv)>1 and sys.argv[1]=="1":
  state = True
else:
  state = False

import RPi.GPIO as IO
IO.setmode(IO.BCM)
IO.setup(relayPin, IO.OUT)
if state:
  IO.output(relayPin, 1)
  print("LED on")
else:
  IO.output(relayPin, 0)
  IO.cleanup()
  print("LED off")