from machine import Pin, PWM, ADC
import utime

# Inisialisasi sensor dan aktuator
ldr = ADC(28)  # Pin ADC LDR
led = Pin(6, Pin.OUT)  # LED Merah
buzzer = PWM(Pin(15))  # Buzzer
buzzer.freq(1000)
buzzer.duty_u16(0)

# Fungsi konversi ADC ke Lux
def adc_to_lux(adc_value):
    return (adc_value / 65535) * 900 + 10

# Kalibrasi Lux Normal selama 2 detik
print("Kalibrasi Lux Normal...")
sampel = []
start = utime.ticks_ms()
while utime.ticks_diff(utime.ticks_ms(), start) < 2000:
    sampel.append(adc_to_lux(ldr.read_u16()))
    utime.sleep(0.05)

lux_normal = sum(sampel) / len(sampel)
print(f"Lux Normal = {lux_normal:.2f} Lux")

# Variabel status
led_blinking = False
blink_start = 0
last_toggle = 0
led_state = False
alarm_triggered = False

# Loop utama
while True:
    nilai_adc = ldr.read_u16()
    lux = adc_to_lux(nilai_adc)
    print(f"Lux Sekarang: {lux:.2f} Lux")

    # Cek apakah lebih terang dari normal + 300 LUX
    if not alarm_triggered and (lux - lux_normal) >= 300:
        buzzer.duty_u16(int(0.25 * 65535))  # Buzzer duty cycle 25%
        led_blinking = True
        blink_start = utime.ticks_ms()
        last_toggle = blink_start
        alarm_triggered = True
        print(">>> Alarm Aktif <<<")

    # Proses kedip LED selama 2 detik
    if led_blinking:
        now = utime.ticks_ms()
        
        # Toggle LED setiap 300ms
        if utime.ticks_diff(now, last_toggle) >= 300:
            led_state = not led_state
            led.value(led_state)
            last_toggle = now

        # Hentikan blinking setelah 2 detik
        if utime.ticks_diff(now, blink_start) >= 2000:
            led_blinking = False
            led.value(0)
            buzzer.duty_u16(0)  # Matikan buzzer setelah 2 detik
            print(">>> Alarm Selesai <<<")

    utime.sleep(0.1)