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

// Set the LCD address to 0x27 for a 16x2 display
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Define the DHT sensor type and pin
#define DHTPIN 2     // Pin connected to the DHT22 sensor
#define DHTTYPE DHT22   // DHT22 (AM2302) sensor

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  // Initialize the LCD
  lcd.begin(16, 2);
  lcd.backlight();
  
  // Initialize the DHT sensor
  dht.begin();

  // Print a welcome message
  lcd.setCursor(0, 0);
  lcd.print("Temp & Humidity");
  delay(2000);
}

void loop() {
  // Read temperature as Celsius and Fahrenheit
  float temperatureC = dht.readTemperature();
  float temperatureF = dht.readTemperature(true);

  // Read humidity
  float humidity = dht.readHumidity();

  // Check if any readings failed
  if (isnan(temperatureC) || isnan(humidity)) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Failed to read");
    delay(2000);
    return;
  }

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

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

  // Wait 2 seconds before next read
  delay(2000);
}