Interfacing DS1307 RTC Module With Arduino

Hello friends, welcome to this tutorial, in this tutorial we are going to discuss how to use DS1307 RTC module in your Arduino project. You can also follow this tutorial for other RTC modules such as DS2301. 

What is DS1307 RTC module?

RTC – Real Time Clock – As is clear from the name itself, DS1307 RTC module is used as a module to remember TIME and DATE and, as I told you earlier, it has an inbuilt battery that keeps the RTC module running. Due to the battery being included, the module remains on and gives precise timing information whenever asked. 

Features of DS1307 RTC Module

• Two-wire I2C interface
• Hour: Minutes: Seconds AM/PM
• Leap year compensation Accurate calendar up to the year 2100
• Consumes Less than 500nA in Battery-Backup
• 1Hz output pin
• 56 Bytes of Non-volatile memory available to the user 4KB of serial electrically erasable and programmable read-only memory (EEPROM)
• Embed DS18B20 temperature sensor interface with the pull-up resistor.

Interfacing DS1307 with Arduino

Hardware Components

• Arduino
• USB Cable
• Power Supply 
• Dupont cable
• Bread-board
• lipo or Liion Battery
• DS1307 RTC Module

Software Component

Arduino IDE

As mentioned in the features, this module uses I2C communication to communicate with the master (microcontroller). So, to communicate with this module, you have to establish I2C communication between DS1130 RTC and Arduino. 

/*
  DS1307 RTC (Real-Time-Clock) Example

  Uno       A4 (SDA), A5 (SCL)
  Mega      20 (SDA), 21 (SCL)
  Leonardo   2 (SDA),  3 (SCL)
 */

#include <Wire.h>
#include <DS1307.h>


DS1307 rtc;


void setup()
{
  /*init Serial port*/
  Serial.begin(9600);
  while(!Serial); /*wait for serial port to connect - needed for Leonardo only*/

  /*init RTC*/
  Serial.println("Init RTC...");

  /*only set the date+time one time*/
  rtc.set(0, 0, 8, 24, 12, 2014); /*08:00:00 24.12.2014 //sec, min, hour, day, month, year*/

  /*stop/pause RTC*/
  // rtc.stop();

  /*start RTC*/
  rtc.start();
}


void loop()
{
  uint8_t sec, min, hour, day, month;
  uint16_t year;

  /*get time from RTC*/
  rtc.get(&sec, &min, &hour, &day, &month, &year);

  /*serial output*/
  Serial.print("\nTime: ");
  Serial.print(hour, DEC);
  Serial.print(":");
  Serial.print(min, DEC);
  Serial.print(":");
  Serial.print(sec, DEC);

  Serial.print("\nDate: ");
  Serial.print(day, DEC);
  Serial.print(".");
  Serial.print(month, DEC);
  Serial.print(".");
  Serial.print(year, DEC);

  /*wait a second*/
  delay(1000);
}

/*
  DS1307 RTC (Real-Time-Clock) Example

  Uno       A4 (SDA), A5 (SCL)
  Mega      20 (SDA), 21 (SCL)
  Leonardo   2 (SDA),  3 (SCL)
 */

#include <Wire.h>
#include <DS1307.h>


DS1307 rtc;


void setup()
{
  /*init Serial port*/
  Serial.begin(9600);
  while(!Serial); /*wait for serial port to connect - needed for Leonardo only*/

  /*init RTC*/
  Serial.println("Init RTC...");

  /*only set the date+time one time*/
  rtc.set(0, 0, 8, 24, 12, 2014); /*08:00:00 24.12.2014 //sec, min, hour, day, month, year*/

  /*stop/pause RTC*/
  // rtc.stop();

  /*start RTC*/
  rtc.start();
}


void loop()
{
  uint8_t sec, min, hour, day, month;
  uint16_t year;

  /*get time from RTC*/
  rtc.get(&sec, &min, &hour, &day, &month, &year);

  /*serial output*/
  Serial.print("\nTime: ");
  Serial.print(hour, DEC);
  Serial.print(":");
  Serial.print(min, DEC);
  Serial.print(":");
  Serial.print(sec, DEC);

  Serial.print("\nDate: ");
  Serial.print(day, DEC);
  Serial.print(".");
  Serial.print(month, DEC);
  Serial.print(".");
  Serial.print(year, DEC);

  /*wait a second*/
  delay(1000);
}

/*
  DS1307 RTC (Real-Time-Clock) Example

  Uno       A4 (SDA), A5 (SCL)
  Mega      20 (SDA), 21 (SCL)
  Leonardo   2 (SDA),  3 (SCL)
 */

#include <Wire.h>
#include <DS1307.h>
#include<LiquidCrystal.h>
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);


DS1307 rtc;


void setup()
{
  /*init Serial port*/
  Serial.begin(9600);
  lcd.begin(16,2);
  while(!Serial); /*wait for serial port to connect - needed for Leonardo only*/

  /*init RTC*/
  Serial.println("Init RTC...");

  /*only set the date+time one time*/
  //rtc.set(10, 20, 4, 4, 2, 2019); /*10:20:04 4.2.2019 //sec, min, hour, day, month, year*/

  /*stop/pause RTC*/
  // rtc.stop();

  /*start RTC*/
  rtc.start();
}


void loop()
{
  uint8_t sec, min, hour, day, month;
  uint16_t year;

  /*get time from RTC*/
  rtc.get(&sec, &min, &hour, &day, &month, &year);

  /*serial output*/
   lcd.setCursor(0,0);
   lcd.print("Time:");
  Serial.print("\nTime: ");
   lcd.setCursor(6,0);
   lcd.print(hour);
  Serial.print(hour, DEC);
   lcd.setCursor(9,0);
   lcd.print(":");
  Serial.print(":");
   lcd.setCursor(10,0);
   lcd.print(min);
  Serial.print(min, DEC);
   lcd.setCursor(12,0);
   lcd.print(":");
  Serial.print(":");
   lcd.setCursor(13,0);
   lcd.print(sec);
  Serial.print(sec, DEC);

  
   lcd.setCursor(0,1);
   lcd.print("Date:");
  Serial.print("\nDate: ");
   lcd.setCursor(6,0);
   lcd.print(day);
  Serial.print(day, DEC);
   lcd.setCursor(9,0);
   lcd.print(".");
  Serial.print(".");
   lcd.setCursor(10,0);
   lcd.print(month);
  Serial.print(month, DEC);
   lcd.setCursor(11,0);
   lcd.print(".");
  Serial.print(".");
   lcd.setCursor(12,0);
   lcd.print(year);
  Serial.print(year, DEC);

  /*wait a second*/
  delay(1000);
}