"""
THIS CODE HAS BEEN TESTED ON RASPBERRY PI 3B AND IS FULLY OPERATIONAL.

Problem Statement: Understanding the connectivity of Raspberry-Pi / Arduino with IR sensor. Write an application to detect obstacle and notify user using LEDs.

Code from InternetOfThingsAndEmbeddedSystems (SPPU - Third Year - Computer Engineering - Content) repository on KSKA Git: https://git.kska.io/sppu-te-comp-content/InternetOfThingsAndEmbeddedSystems
"""

# BEGINNING OF CODE
# SINGLE LED ON/OFF
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO setwarnings(False)
GPIO.setup(12,GPIO.OUT)
try:
  while True:
      print(“LED ON”)
      GPIO.output(12,GPIO.HIGH)
      time.sleep(1)
      print(“LED OFF”)
      GPIO.output(12,GPIO.LOW)
      time.sleep(1)
except:
  GPIO.cleanup()

##########

# TWO LEDs ON/OFF
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO setwarnings(False)
GPIO.setup(12,GPIO.OUT)
GPIO.setup(19,GPIO.OUT)
try:
  while True:
      print(“LED ON”)
      GPIO.output(12,GPIO.HIGH)
      GPIO.output(19,GPIO.HIGH)
      time.sleep(1)
      print(“LED OFF”)
      GPIO.output(12,GPIO.LOW)
      GPIO.output(19,GPIO.LOW)
      time.sleep(1)
except:
  GPIO.cleanup()

##########

# BUZZER WITH ONE LED ON/OFF
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(12,GPIO.OUT)
GPIO.setup(19,GPIO.OUT)
try:
  while True:
    print("LED Buzzer ON")
    GPIO.output(12,GPIO.HIGH)
    GPIO.output(19,GPIO.HIGH)
    time.sleep(1)
    print("LED & Buzzer OFF")
    GPIO.output(12,GPIO.LOW)
    GPIO.output(19,GPIO.LOW)
    time.sleep(1)
except:
  GPIO.cleanup()

##########
# END OF CODE