from machine import Pin, PWM, ADC
import utime

# Inisialisasi komponen
ldr_sensor = ADC(28)           # Sensor LDR di pin GP28
led_merah = Pin(6, Pin.OUT)    # LED di pin GP6
buzzer = PWM(Pin(15))          # Buzzer di pin GP15

# Set awal buzzer
buzzer.freq(1000)
buzzer.duty_u16(0)             # Buzzer mati di awal

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

# Fungsi untuk ambil rata-rata lux normal
def ambil_lux_normal():
    data_lux = []
    waktu_awal = utime.ticks_ms()
    while utime.ticks_diff(utime.ticks_ms(), waktu_awal) < 2000:
        nilai = ldr_sensor.read_u16()
        lux = konversi_ke_lux(nilai)
        data_lux.append(lux)
        utime.sleep_ms(50)
    rata2 = sum(data_lux) / len(data_lux)
    return rata2

# Program utama
print("Mengambil data lux normal...")
lux_normal = ambil_lux_normal()
print("Lux normal didapat:", lux_normal)

# Variabel kontrol
buzzer_duty = 0
sudah_blinking = False  # Supaya LED hanya kedip sekali

while True:
    nilai_adc = ldr_sensor.read_u16()
    lux_sekarang = konversi_ke_lux(nilai_adc)
    print("ADC:", nilai_adc, "| Lux:", lux_sekarang)

    if (lux_sekarang - lux_normal) >= 300:
        buzzer_duty = int(0.25 * 65535)
        buzzer.duty_u16(buzzer_duty)

        if not sudah_blinking:
            # Mulai blinking 2 detik
            waktu_mulai = utime.ticks_ms()
            led_status = False
            waktu_terakhir = waktu_mulai

            while utime.ticks_diff(utime.ticks_ms(), waktu_mulai) < 2000:
                sekarang = utime.ticks_ms()
                if utime.ticks_diff(sekarang, waktu_terakhir) >= 300:
                    led_status = not led_status
                    led_merah.value(led_status)
                    waktu_terakhir = sekarang
                utime.sleep_ms(50)

            led_merah.off()  # Pastikan LED mati setelah 2 detik
            sudah_blinking = True  # Jangan blinking lagi

    else:
        # Kalau lux <= 300, buzzer mati dan reset blinking
        if buzzer_duty > 0:
            buzzer_duty = 0
            buzzer.duty_u16(0)

        led_merah.off()
        sudah_blinking = False  # Reset supaya bisa blinking lagi kalau ada perubahan

    utime.sleep_ms(100)