#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#define DHTPIN 23          
#define DHTTYPE DHT22 

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);
float temperature;
float humidity;

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

void loop() {
  lcd.setCursor(0,0);
  temperature = dht.readTemperature();
  humidity = dht.readHumidity();

  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C"); 
  delay(1000); 

  lcd.setCursor(0, 1);
  lcd.print("Humi: ");
  lcd.print(humidity);
  delay(1000); 
  
  if (isnan(temperature)) {
    lcd.setCursor(0, 0);
    lcd.print("Error");
    return;
  }
  if (isnan(humidity)) {
    lcd.setCursor(0, 1);
    lcd.print("Error");
    return;
  }
}