#include <Wire.h>
#include <RTClib.h>
#include <LiquidCrystal_I2C.h>
int val;
int tempPin = 0;


RTC_DS1307 rtc;

LiquidCrystal_I2C lcd(0x27, 16, 2); // Change the address if necessary


void setup() {
  Serial.begin(9600);
  lcd.init(); // Initialize the LCD display
  lcd.backlight(); // Turn on the backlight
  //lcd.noBacklight();//Turn off the backlight

  Wire.begin(); // Initialize I2C bus

  if (!rtc.begin()) {
    Serial.println("RTC is not running!");
    while (1);
  }

  if (!rtc.isrunning()) {
    Serial.println("RTC is not initialized, setting time...");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

  
}

void loop() {
  DateTime now = rtc.now();

  char date[11];
  char time[9];

 

  int sec = now.second();

  if (sec == 0 || sec == 1 || sec == 2 || sec == 3 ){
    tone(12,5000,100);
    delay(100);

  }


  sprintf(date, "%02d-%02d-%04d", now.month(), now.day(), now.year());
  sprintf(time, "%02d:%02d:%02d", now.hour(), now.minute(), now.second());

  Serial.print(date);
  Serial.print(" ");
  Serial.print(time);


  Serial.println();

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print(date);
  lcd.setCursor(0, 1);
  lcd.print(time);

  //const float BETA = 3950;
  //int analogValue = analogRead(A0);
  //float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  
  val = analogRead(tempPin);
  float mv = (val/1023.0)*5000; 
  float cel = mv/10;


  lcd.setCursor(12, 0);
  lcd.print("TEMP");
  lcd.setCursor(12, 1);
  lcd.print(cel);
  lcd.setCursor(14, 1);
  lcd.print("*C");

  delay(1000);
}