from machine import Pin
import utime
pir_pin = Pin(16, Pin.IN)
buzzer_pin = Pin(17, Pin.OUT)
def motion_detected(pin):
    print("Motion detected!")
    buzzer_pin.on() 
    utime.sleep(2)  
    buzzer_pin.off()  

pir_pin.irq(trigger=Pin.IRQ_RISING, handler=motion_detected)


try:
    while True:
        print("Waiting for motion...")
        utime.sleep(1)

except KeyboardInterrupt:
    pir_pin.irq(handler=None) 
    buzzer_pin.off()  
    print("Exiting...")