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

#define DHT_PIN 4
#define DHTTYPE DHT22
DHT dht(DHT_PIN,DHTTYPE);

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup()
{
  Wire.begin(21,22);
  lcd.init();
  lcd.backlight();

  dht.begin();
  delay(2000);
}

void loop()
{
  float t=dht.readTemperature();
  float h=dht.readHumidity();

  lcd.clear();

  if (isnan(t) || isnan(h)) {
    lcd.setCursor(0, 0);
    lcd.print("DHT Error");
  } else {
    lcd.setCursor(0, 0);
    lcd.print("Temp:");
    lcd.print(t);
    lcd.print("°C");

    lcd.setCursor(0, 1);
    lcd.print("Humi:");
    lcd.print(h);
    lcd.print("%");
  }
  delay(2000);
}