DS3231 Alarm

// DS3231_Serial_Hard
// Copyright (C)2015 Rinky-Dink Electronics, Henning Karlsen. All right reserved
// web: http://www.RinkyDinkElectronics.com/
//
// A quick demo of how to use my DS3231-library to
// retrieve time- and date-data for you to manipulate.
//
// To use the hardware I2C (TWI) interface of the Arduino you must connect
// the pins as follows:
//
// Arduino Uno/2009:
// ----------------------
// DS3231:  SDA pin   -> Arduino Analog 4 or the dedicated SDA pin
//          SCL pin   -> Arduino Analog 5 or the dedicated SCL pin
//
// Arduino Leonardo:
// ----------------------
// DS3231:  SDA pin   -> Arduino Digital 2 or the dedicated SDA pin
//          SCL pin   -> Arduino Digital 3 or the dedicated SCL pin
//
// Arduino Mega:
// ----------------------
// DS3231:  SDA pin   -> Arduino Digital 20 (SDA) or the dedicated SDA pin
//          SCL pin   -> Arduino Digital 21 (SCL) or the dedicated SCL pin
//
// Arduino Due:
// ----------------------
// DS3231:  SDA pin   -> Arduino Digital 20 (SDA) or the dedicated SDA1 (Digital 70) pin
//          SCL pin   -> Arduino Digital 21 (SCL) or the dedicated SCL1 (Digital 71) pin
//
// The internal pull-up resistors will be activated when using the
// hardware I2C interfaces.
//
// You can connect the DS3231 to any available pin but if you use any
// other than what is described above the library will fall back to
// a software-based, TWI-like protocol which will require exclusive access
// to the pins used, and you will also have to use appropriate, external
// pull-up resistors on the data and clock signals.
//

#include <DS3231.h>

// Init the DS3231 using the hardware interface
DS3231  rtc(SDA, SCL);

// Init a Time-data structure
Time  t;

void setup()
{
  // Setup Serial connection
  Serial.begin(115200);
  // Uncomment the next line if you are using an Arduino Leonardo
  //while (!Serial) {}

  // Initialize the rtc object
  rtc.begin();

  // The following lines can be uncommented to set the date and time
  rtc.setDOW(SUNDAY);     // Set Day-of-Week to SUNDAY
  rtc.setTime(12, 0, 0);     // Set the time to 12:00:00 (24hr format)
  rtc.setDate(1, 1, 2016);   // Set the date to DD/MM/YYYY
}

void loop()
{

  t = rtc.getTime();   // Get data from the DS3231

  // Send date over serial connection
  Serial.print("Date: ");
  Serial.print(t.date, DEC);
  Serial.print("/");
  Serial.print(t.mon, DEC);
  Serial.print("/");
  Serial.print(t.year, DEC);
  Serial.println();

  // Send Day-of-Week and time
  Serial.print("Day of Week: ");
  Serial.print(t.dow, DEC);
  Serial.println();
  Serial.print("Time: ");
  Serial.print(t.hour, DEC);
  Serial.print(":");
  Serial.print(t.min, DEC);
  Serial.print(":");
  Serial.print(t.sec, DEC);
  Serial.println();
  Serial.println("--------------------------------");

  delay(1000); //Delay is for displaying the time in 1 second interval.

  if (t.hour == 14 && t.min == 32 && t.sec == 53) //Setting alarm/timer at every 2:32:53pm, in other words you can insert t.dow for every Thursday?, t.date for specific date?
  { digitalWrite(9,HIGH); //Lets say that your component is wired to pin 9
}
}