from machine import Pin, ADC
from esp32_gpio_lcd import GpioLcd
from utime import sleep
import math

# 1. Inisialisasi LCD
lcd = GpioLcd(rs_pin=Pin(13),
              enable_pin=Pin(12),
              d4_pin=Pin(25),
              d5_pin=Pin(26),
              d6_pin=Pin(27),
              d7_pin=Pin(14),
              num_lines=2, num_columns=16)

# 2. Inisialisasi Sensor
ldr_pin = ADC(Pin(34))
temp_pin_setup = Pin(35, Pin.IN, Pin.PULL_UP)
temp_pin = ADC(temp_pin_setup)
ldr_pin.atten(ADC.ATTN_11DB)
temp_pin.atten(ADC.ATTN_11DB)

lcd.putstr("Sistem Fire IoT\nStarting...")
sleep(2)
lcd.clear()

while True:
    # Membaca nilai analog
    val_ldr = ldr_pin.read()
    val_temp = temp_pin.read()

    # --- Rumus Lux (Wokwi Compatible) ---
    voltage_ldr = val_ldr / 4095 * 3.3
    if 0 < voltage_ldr < 3.3:
        # Gunakan rumus ini jika angka terbalik: 10000 * (3.3 - voltage_ldr) / voltage_ldr
        resistance = 10000 * voltage_ldr / (3.3 - voltage_ldr)
        lux = pow(50000 * pow(10, 0.7) / resistance, (1 / 0.7))
    else:
        lux = 0
    
    if lux > 1000: lux = 1000

    # --- Rumus Suhu (NTC Steinhart-Hart) ---
    if val_temp > 0 and val_temp < 4095:
        # 3950 adalah nilai Beta standar NTC Wokwi
        celsius = 1 / (math.log(1 / (4095 / val_temp - 1)) / 3950 + 1 / 298.15) - 273.15
    else:
        celsius = 0
    
    suhu = celsius
    
    # --- Penentuan Status ---
    if 1 <= lux <= 200 and 0 <= suhu <= 60:
        status = "AMAN"
    elif 200 < lux <= 600 and 61 <= suhu <= 100:
        status = "WASPADA"
    elif lux > 600 and suhu > 100:
        status = "KEBAKARAN !!"
    else:
        status = "NORMAL"

    # --- Update Tampilan LCD (BAGIAN PERBAIKAN) ---
    lcd.move_to(0, 0)
    lcd.putstr("L:{:.0f} S:{:.1f}C   ".format(lux, suhu)) # Spasi di akhir untuk hapus sisa angka
    
    lcd.move_to(0, 1)
    lcd.putstr(status + "                ") # Spasi panjang untuk hapus status sebelumnya

    # Debugging
    print("Lux: {:.1f}, Suhu: {:.1f} -> {}".format(lux, suhu, status))
    
    sleep(1)