#include<Wire.h>
#include<LiquidCrystal_I2C.h>
#include<DHT.h>

#define DHT_PIN 2
#define MQ2_PIN A0
#define DHT_TYPE DHT22

LiquidCrystal_I2C lcd(0x27,16,2);
DHT dht(DHT_PIN,DHT_TYPE);

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  dht.begin();
  pinMode(MQ2_PIN, INPUT);

}

void loop() {
  //static unsigned long lastSensorRead =0;

  // if(millis() - lastSensorRead >2000)
  // {
    float humidity=dht.readHumidity();
    float temperature=dht.readTemperature();
    int gasValue= analogRead(MQ2_PIN);

    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("T:");
    lcd.print(temperature);
    lcd.print("C,H:");
    lcd.print( humidity);
    lcd.setCursor(0,1);
    lcd.print("%");
    lcd.print(", GAS:");
    lcd.print(gasValue);
     lcd.print("ppm");

    Serial.print("Temperature:");
    Serial.print(temperature);
    Serial.print("°C, Humidity:");
    Serial.print( humidity);
    Serial.print("%, Gas Level: ");
    Serial.print( gasValue);
    Serial.print(",");

    // lastSensorRead=millis();
    delay(2000);

  //}

}