from machine import Pin, ADC, I2C
from time import sleep
from i2c_lcd import I2cLcd

# Inisialisasi LCD
i2c = I2C(0, scl=Pin(22), sda=Pin(21), freq=400000)
lcd = I2cLcd(i2c, 0x27, 2, 16)

# Sensor MQ2
mq2 = ADC(Pin(34))
mq2.atten(ADC.ATTN_11DB)

# Buzzer
buzzer = Pin(27, Pin.OUT)

while True:
    
    gas = mq2.read()
    
    lcd.clear()
    lcd.move_to(0,0)
    lcd.putstr("Gas Level:")
    
    lcd.move_to(0,1)
    lcd.putstr(str(gas))
    
    # Jika gas tinggi
    if gas > 2000:
        buzzer.on()
    else:
        buzzer.off()
    
    sleep(1)