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

#define DHT22_PIN 13

LiquidCrystal_I2C lcd(0x27, 16, 2);
DHT dht22(DHT22_PIN, DHT22);

void setup () {
  dht22.begin();
  lcd.init();
  lcd.backlight();
}

void loop () {
  float humi = dht22.readHumidity();
  float tempC = dht22.readTemperature();

  lcd.clear();

  if (isnan(tempC)|| isnan(humi)) {
    lcd.setCursor(0, 0);
    lcd.print("Error");
  } else {
     lcd.setCursor(0, 0);
     lcd.print("Temp: ");
     lcd.print(tempC);
     lcd.print(" C ");

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