import machine
import utime

k=0

sensor_pir = machine.Pin(28, machine.Pin.IN, machine.Pin.PULL_DOWN)
led = machine.Pin(15, machine.Pin.OUT)

def pir_handler(pin):
    global k
    utime.sleep_ms(100)
    if pin.value():
        print("ALARM! Motion detected!")
        for i in range(20):
            led.toggle()
            utime.sleep_ms(100)
        k=0
        
sensor_pir.irq(trigger=machine.Pin.IRQ_RISING, handler=pir_handler)

while True:
    print(k,"kein Interrupt")
    k=k+1
    utime.sleep(.2)