#include <DHT.h>
#include <LiquidCrystal.h>

// DHT setup
#define DHTPIN 2
#define DHTTYPE DHT22   // Using DHT22
DHT dht(DHTPIN, DHTTYPE);

// LCD setup (RS, E, D4, D5, D6, D7)
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);

void setup() {
  lcd.begin(16, 2);
  dht.begin();

  lcd.setCursor(0, 0);
  lcd.print("DHT22 Sensor");
  lcd.setCursor(0, 1);
  lcd.print("Initializing...");
  delay(2000);
  lcd.clear();
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Check if reading failed
  if (isnan(temperature) || isnan(humidity)) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Sensor Error!");
    delay(2000);
    return;
  }

  // Display Temperature
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print((char)223); // Degree symbol
  lcd.print("C");

  // Display Humidity
  lcd.setCursor(0, 1);
  lcd.print("Hum: ");
  lcd.print(humidity);
  lcd.print(" %");

  delay(2000);
}