from machine import Pin 
from time import sleep, ticks_ms

button = Pin(14, Pin.IN, Pin.PULL_UP)
pir =  Pin(25, Pin.IN)
led = Pin(32, Pin.OUT)
siren = Pin(18, Pin.OUT)

button_before = 0
button_now = 0

state_alarm_led = 0
timestamp = 0
alarm_state = 0
sirene_state = 0
timer_sirene = 0

SIREN_ON_TIME = 10000 # 10000 ms sirene ( blauwe led)  ON

print("Alarmsystem started!")

while True:

    button_now = button.value()

    if button_now != button_before:
        button_before = button_now

        if button_now == 0:
            alarm_state = not alarm_state
            print("alarm_state=", alarm_state)
            if alarm_state == False:
                led.value(0)

        sleep(0.01)

    if alarm_state:

        if ticks_ms() - timestamp > 500:
            timestamp = ticks_ms()
            state_alarm_led = not state_alarm_led
            led.value(state_alarm_led)

        if pir.value():
            print("PIR triggered!")
            if sirene_state == 0 :
                print("start sirene")
                siren.value(1)
                sirene_state = 1
                timer_sirene = ticks_ms()

        if sirene_state:
            if ticks_ms() - timer_sirene > SIREN_ON_TIME:
                print("start sirene")
                siren.value(0)
                sirene_state = 0


# oefening : als je het alarm uitschakelt terwijl de sirene loeit, wat gebeurt er dan? Hoe los je dat op?