from machine import Pin, PWM, ADC
import utime

# Setup pin
ldr = ADC(28)          # Pin AO dari LDR ke GP28
led = Pin(6, Pin.OUT)  # LED di GP6
buzzer = PWM(Pin(15))  # Buzzer di GP15 dengan PWM

# Konfigurasi PWM buzzer
buzzer.freq(1000)
buzzer.duty_u16(0)

# Fungsi sederhana ADC ke Lux
def adc_to_lux(adc_value):
    # ADC 65535 (terang sekali), ADC 0 (gelap total)
    # Buat mapping sederhana dari pengamatan eksperimen
    return (65535 - adc_value) / 65535 * 1000  # Lux range 0-1000 (disesuaikan)

# Tentukan nilai normal 200 lux
lux_normal = 200

while True:
    analog_value = ldr.read_u16()
    lux = adc_to_lux(analog_value)
    print(f"LDR Value: {analog_value} | Lux: {lux:.2f}")

    if lux < lux_normal:
        print("Cahaya lebih gelap dari 200 lux! Menyalakan LED & Buzzer...")

        # Buzzer ON 55%
        buzzer.duty_u16(int(0.55 * 65535))
        
        start_time = utime.ticks_ms()
        while utime.ticks_diff(utime.ticks_ms(), start_time) < 5000:  # selama 5 detik
            led.toggle()
            utime.sleep(0.5)  # LED kedip tiap 0.5 detik

        # Matikan semua setelah 5 detik
        buzzer.duty_u16(0)
        led.off()

    else:
        buzzer.duty_u16(0)
        led.off()

    utime.sleep(0.2)