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

// Define pin connected to the DHT sensor
#define DHTPIN 2     // Digital pin connected to the DHT sensor

// Define DHT sensor type
#define DHTTYPE DHT22   // DHT 22  

// Define LCD
LiquidCrystal_I2C lcd(0x27, 16, 2);  // Set the LCD address to 0x27 for 16 chars and 2 lines

// Initialize DHT sensor
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
  lcd.init();                      // initialize the lcd 
  lcd.backlight();            // open the backlight
}

void loop() {
  // Wait a few seconds between measurements.
  delay(2000);

  // Reading temperature or humidity takes about 250 milliseconds!
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature(); 

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  // Print the values to the serial port
  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.println(F("°C "));

  // Print the values to the LCD
  lcd.setCursor(0, 0);
  lcd.print("Humidity: ");
  lcd.print(h);
  lcd.print("%");

  lcd.setCursor(0, 1);
  lcd.print("Temp: ");
  lcd.print(t);
  lcd.print("C");
}