import dht
from machine import Pin, ADC
from time import sleep

# DHT22 sensor
sensor = dht.DHT22(Pin(18))

# MQ2 smoke sensor (analog)
smoke_sensor = ADC(28)

# LEDs
red = Pin(13, Pin.OUT)
green = Pin(14, Pin.OUT)
amber = Pin(15, Pin.OUT)

while True:

    # Read temperature and humidity
    sensor.measure()

    temp = sensor.temperature()
    humidity = sensor.humidity()

    # Read gas sensor
    gas_value = smoke_sensor.read_u16()

    # Convert to voltage
    voltage = (gas_value / 65535) * 3.3

    # Print readings
    print("Temperature:", temp, "C")
    print("Humidity:", humidity, "%")

    print("Gas Analog Value:", gas_value)
    print("Voltage:", round(voltage, 2), "V")

    # Turn OFF LEDs
    red.off()
    green.off()
    amber.off()

    # Temperature status
    if temp < 30:
        green.on()
        print("Temperature Status: Normal Operating Condition")

    elif 30 <= temp <= 35:
        amber.on()
        print("Temperature Status: Warning / Getting Hot")

    else:
        red.on()
        print("Temperature Status: Critical Overheating")

    # Gas status
    if gas_value > 30000:
        
        print("Gas Status: DANGER! Smoke Detected!")

    elif 15000 <= gas_value <= 30000:
      
        print("Gas Status: Warning!")

    else:
       
        print("Gas Status: Normal")

    print("-----------------------------")

    sleep(2)