from machine import *
from utime import *

signal_rot = Pin(4, Pin.OUT)
signal_gruen = Pin(5, Pin.OUT)

lkw_vorn = Pin(12, Pin.OUT)
lkw_hinten = Pin(15, Pin.OUT)
lkw_sirene = PWM(Pin(13), freq=1000)

eisenbahn = PWM(Pin(14), freq=1000)

taster = Pin(2, Pin.IN, Pin.PULL_UP)

lichtsensor = ADC(0)
sensorwert = 0

signal_rot.value(0)
signal_gruen.value(0)
lkw_vorn.value(0)
lkw_hinten.value(0)
lkw_sirene.duty(0)
eisenbahn.duty(0)


while True:
    signal_rot.value(1)
    sleep(1)
    signal_rot.value(0)
    signal_gruen.value(1)
    sleep(1)
    signal_gruen.value(0)
    sleep(1)
    sensorwert = lichtsensor.read_u16()
    print("Helligkeit: " + str(sensorwert))
    sleep(1)
    eisenbahn.duty(1023)
    sleep(1)
    eisenbahn.duty(0)
    lkw_vorn.value(1)
    lkw_hinten.value(1)
    sleep(1)
    lkw_vorn.value(0)
    lkw_hinten.value(0)
    for i in range(2):
        for hell in range(0,255):
            lkw_sirene.duty(hell)
            sleep(0.005)
        for hell in range(255,0,-1):
            lkw_sirene.duty(hell)
            sleep(0.005)
    lkw_sirene.duty(0)
    sleep(1)