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

// Initialize the LCD with the I2C address (usually 0x27)
LiquidCrystal_I2C lcd(0x27, 16, 2);

// DHT11 sensor
#define DHTPIN 2     // Pin which is connected to the DHT sensor
#define DHTTYPE DHT11   // DHT 11

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  // Initialize the LCD with 16 columns and 2 rows
  lcd.begin(16, 2);
  lcd.backlight();

  // Initialize Serial communication
  Serial.begin(9600);

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

  // Print a message to the LCD.
  lcd.setCursor(0, 0);
  lcd.print("DHT11 Sensor");
  lcd.setCursor(0, 1);
  lcd.print("Initializing...");
  delay(2000);  // Wait for 2 seconds
}

void loop() {
  // Read humidity
  float h = dht.readHumidity();
  // Read temperature as Celsius
  float t = dht.readTemperature();

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

  // Print the readings on the LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(t);
  lcd.print(" C");

  lcd.setCursor(0, 1);
  lcd.print(" Hum: ");
  lcd.print(h);
  lcd.print(" %");

  // Print the readings to Serial Monitor
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.print(" °C, Humidity: ");
  Serial.print(h);
  Serial.println(" %");

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