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

// Define the LCD address and size (16 columns and 2 rows)
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Define the DHT sensor type and pin
#define DHTPIN 2
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  // Initialize the LCD
  lcd.init();
  lcd.backlight();

  // Initialize the DHT sensor
  dht.begin();

  // Print a welcome message on the LCD
  lcd.setCursor(0, 0);
  lcd.print("DHT22 Sensor");
  lcd.setCursor(0, 1);
  lcd.print("Initializing...");
  delay(2000);
}

void loop() {
  // Read the temperature and humidity from the DHT22 sensor
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // Check if any reads failed and exit early (to try again)
  if (isnan(humidity) || isnan(temperature)) {
    lcd.setCursor(0, 0);
    lcd.print("Failed to read");
    lcd.setCursor(0, 1);
    lcd.print("from sensor!");
    return;
  }

  // Clear the LCD and print the temperature and humidity
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C");

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

  // Wait a few seconds between measurements
  delay(2000);
}