from machine import Pin
from time import sleep

pir_pin = Pin(7, Pin.IN)
buzz_pin = Pin(12, Pin.OUT)

motion_detected = False
motion_stopped_printed = False

def pir_interrupt(pin):
    global motion_detected
    
    if pin.value() == 1:
        motion_detected = True
        buzz_pin.value(1)
        
    else:
        motion_detected = False
        buzz_pin.value(0)

pir_pin.irq(trigger=(Pin.IRQ_RISING | Pin.IRQ_FALLING), handler=pir_interrupt)

try:
    while True:
        if motion_detected and not motion_stopped_printed:
            print("Motion detected!")
            motion_stopped_printed = True
            
        elif not motion_detected and motion_stopped_printed:
            print("Motion stopped.")
            motion_stopped_printed = False
            
        sleep(0.1)

except KeyboardInterrupt:
    print("Keyboard interrupt.")
    pir_pin.irq(trigger=0)
    buzz_pin.value(0)