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

// Define the pins
#define DHTPIN 2     // Pin where the DHT22 is connected
#define DHTTYPE DHT22   // DHT 22 (AM2302)

float currentTemp = 0.0;
float desiredTemp = 25.0; // Default desired temperature

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

// Initialize the LCD (address 0x27, 16 columns and 2 rows)
LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
  // Start the DHT sensor
  dht.begin();

  // Initialize the LCD
  lcd.clear();
  lcd.init();
  lcd.backlight(); // Turn on the backlight

  // Print initial message on the LCD
  lcd.setCursor(4, 0);
  lcd.print("PV");
  lcd.setCursor(12, 0);
  lcd.print("SV");
  //lcd.setCursor(2,03);
  //lcd.print("Temp & Humidity");
}

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

  // Read temperature as Celsius
  float humidity = dht.readHumidity();
  currentTemp = dht.readTemperature(); // Celsius

  // Check if any reads failed and exit early (to try again).
  if (isnan(humidity) || isnan(currentTemp)) {
    lcd.setCursor(0, 1);
    lcd.print("Error reading!");
    return;
  }

  // Display the temperature and humidity on the LCD
  lcd.setCursor(0, 1);
  lcd.print("T: ");
  lcd.print(currentTemp);
  lcd.setCursor(17, 1);
  lcd.print("'C");

  lcd.setCursor(0, 2);
  lcd.print("H: ");
  lcd.print(humidity);
  lcd.setCursor(17, 2);
  lcd.print(" %");


}