print("Hello, ESP32!")
print("This program integrates PIR sensor with ESP32")
 
# Credits to https://RandomNerdTutorials.com & program edited accordingly
# 1.import all necessary module / library 
from machine import Pin # to declare Pin 14 & 12
from utime import sleep

# 2. INITIALIZE THE MOTION 
motion = False  #initialize there is no movement

# 3. create function interrupt handling
# THIS FUNC WILL BE CALL EVERY TIME A MOTION IS DETECTED
def handle_interrupt(pin):  #def = function
  global motion
  motion = True
  global interrupt_pin  
  interrupt_pin = pin 
 
 # 4. declare input output pin
 # LED as output and PIR sensor as input
led_yellow = Pin(14, Pin.OUT) # OUT = output
pir = Pin(12, Pin.IN) # IN = input
 
# 5. set interrupt pin on PIR sensor by using irq() method
pir.irq(trigger=Pin.IRQ_RISING, handler=handle_interrupt)

# 6. time to test how we can compare the output of LED when there is motion or no motion 
while True: # forever loop
  if motion == True:  # a motion has been detected
    print('Motion detected! Interrupt caused by:', interrupt_pin, 'LED Red = ON' )
    for i in range (10):  # akan blinking for 10 times
      led_yellow.on()
      sleep(0.5)
      led_yellow.off()
      sleep(0.5)
    
    print('Motion stopped! LED Red = OFF') # no motion
    motion = False