from machine import Pin, Timer
print ("Programm gestartet")
led = Pin(14, Pin.OUT, value=0)
kontakt1 = Pin(5, Pin.IN, Pin.PULL_UP)
kontakt2 = Pin(9, Pin.IN, Pin.PULL_DOWN)
timer = Timer()

# Funktion zur Alarmkontakt-Auswertung
while True:
    if kontakt1.value() == 0:
        led.on()
    elif kontakt2.value() == 0:
        led.on()

def blink(timer):
    led.toggle()

timer.init(freq=2.5, mode=Timer.PERIODIC, callback=blink)