from machine import Pin, PWM, ADC
import utime

# Pin Setup
ldr = ADC(28)               # Pin AO dari LDR ke GP28
ldr_digital = Pin(0, Pin.IN)  # Pin DO dari LDR ke GP0 (tidak digunakan dalam kode)
led = Pin(6, Pin.OUT)       # LED di GP6
buzzer = PWM(Pin(15))       # Buzzer di GP15 dengan PWM

# Konfigurasi PWM Buzzer
buzzer.freq(1000)           # Frekuensi awal buzzer (1kHz)
buzzer.duty_u16(0)          # Mulai dengan buzzer mati

# Fungsi untuk mengonversi nilai ADC ke lux
def adc_to_lux(adc_value):
    return ((65535- adc_value) / 65535) * 900 + 10  # Rentang 10 - 910 lux

# Variabel untuk menyimpan kondisi normal awal
lux_normal = 0

# Variabel untuk kedip LED
last_blink_time = utime.ticks_ms()
led_state = False
led_should_blink = False  # hanya True saat mendeteksi perubahan cahaya signifikan

# Loop utama
while True:
    analog_value = ldr.read_u16()
    lux = adc_to_lux(analog_value)

    if lux_normal == 0:
        lux_normal = lux
        print(f"Lux Normal: {lux_normal}")

    print(f"LDR Value: {analog_value} | Lux: {lux}")

    if lux > lux_normal - 490.2289:
        led_should_blink = True      # Aktifkan mode kedip
        buzzer.duty_u16(29490)       # Nyalakan buzzer
        for i in range(500, 500):  # Variasi frekuensi buzzer
            buzzer.freq(i)
            utime.sleep(0.1)
    else:
        led_should_blink = False
        led.off()
        buzzer.duty_u16(0)

    # Kedip LED jika perlu 
#    if led_should_blink: 
#        current_time = utime.ticks_ms() 
#        if utime.ticks_diff(current_time, last_blink_time) >= 1000: 
#            led_state = not led_state 
#            led.value(led_state) 
#            last_blink_time = current_time 

    # Kedip LED jika perlu
    if led_should_blink:
        t = utime.time() % 8  # Ulangi setiap 8 detik
        if t < 4:
            led.toggle()
            utime.sleep(0.5)
        else:
            led.off()

    utime.sleep(0.1)  # Delay supaya tidak terlalu cepat membaca LDR