from machine import Pin
import utime

# Define the PIR sensor input and buzzer output pins
pir_pin = Pin(18, Pin.IN)
buzzer_pin = Pin(27, Pin.OUT)

# Function to activate the buzzer when motion is detected
def motion_detected(pin):
    print("Motion detected!")
    buzzer_pin.on()  # Turn on the buzzer
    utime.sleep(2)  # Keep the buzzer on for 2 seconds
    buzzer_pin.off()  # Turn off the buzzer

# Configure the PIR sensor to trigger an interrupt on motion
pir_pin.irq(trigger=Pin.IRQ_RISING, handler=motion_detected)

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

except KeyboardInterrupt:
    # Clean up and exit on Ctrl+C
    pir_pin.irq(handler=None)  # Disable the PIR interrupt
    buzzer_pin.off()  # Turn off the buzzer
    print("Exiting...")