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

#define DHTPIN 2 // DHT22 sensor pin
#define DHTTYPE DHT22 // DHT22 sensor type

DHT dht(DHTPIN, DHTTYPE);
RTC_DS1307 rtc;
LiquidCrystal_I2C lcd(0x27, 16, 2); // Initialize with 16 columns and 2 rows
float t = -999;
void setup() {
  Serial.begin(9600);
  dht.begin();
  rtc.begin();
  lcd.begin(20, 4); // Specify the number of columns and rows
  lcd.backlight();
}

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

  // Convert float temperature to integer
  int intTemperature = static_cast<int>(temperature);  // Casting float to int to get the integer part

  // Read current time and date from DS1307 RTC sensor
  DateTime now = rtc.now();

  // Update the display only if the temperature changes
  if(intTemperature != static_cast<int>(t)){  // Compare the integer part only
    t = temperature;  // Store the last temperature (float for comparison on next loop)
    lcd.clear();
    lcd.setCursor(0, 0); // Set cursor to the first line
    lcd.print("Tem: ");
    lcd.print(intTemperature);  // Display the integer part only
    lcd.print("C");

    // Display the date on the second line of the LCD
    lcd.setCursor(0, 1); // Set cursor to the second line
    lcd.print("Date: ");
    lcd.print(now.day(), DEC);
    lcd.print('/');
    lcd.print(now.month(), DEC);
    lcd.print('/');
    lcd.print(now.year(), DEC);

    // Set cursor to the third line for time
    lcd.setCursor(0, 2);
    lcd.print("Time: ");
    lcd.print(now.hour(), DEC);
    lcd.print(':');
    lcd.print(now.minute(), DEC);
    lcd.print(':');
    lcd.print(now.second(), DEC);
  }
  delay(500);  // Delay a bit before the next read
}