{"id":27399,"date":"2016-10-14T09:30:20","date_gmt":"2016-10-14T09:30:20","guid":{"rendered":"http:\/\/randomnerdtutorials.com\/?p=27399"},"modified":"2019-04-02T10:23:31","modified_gmt":"2019-04-02T10:23:31","slug":"guide-for-real-time-clock-rtc-module-with-arduino-ds1307-and-ds3231","status":"publish","type":"post","link":"https:\/\/randomnerdtutorials.com\/guide-for-real-time-clock-rtc-module-with-arduino-ds1307-and-ds3231\/","title":{"rendered":"Guide for Real Time Clock (RTC) Module with Arduino (DS1307 and DS3231)"},"content":{"rendered":"

This post is about how to use the DS1307 Real Time Clock (RTC) module with the Arduino. You can also follow this guide for other similar modules\u00a0like the DS3231 RTC.<\/p>\n

Introducing the Real Time Clock module<\/h2>\n

The real time clock module is the one in the figure below (front and back view).<\/p>\n

\"rtc-front-and-back-view\"<\/p>\n

When you first use this module, you need to solder some header pins.<\/p>\n

As you can see in the picture above, the module has a backup battery installed. This allows the module to retain the time, even when it\u2019s not being powered up by the Arduino. This way, every time you turn on and off your module,\u00a0the time doesn’t reset.<\/p>\n

This module uses I2C communication. This means that it communicates with the Arduino using just 2 pins.<\/p>\n

Where to buy?<\/h2>\n

The Real Time Clock is an affordable module. You can check the DS1307 Real Time Clock module on Maker Advisor<\/a> and find the best price.<\/p>\n

Pin Wiring<\/h2>\n

Wiring the RTC module is pretty straightforward!<\/p>\n\n\n\n\n\n\n\n
Pin<\/strong><\/td>\nWiring to Arduino Uno<\/strong><\/td>\n<\/tr>\n
SCL<\/td>\nA5<\/td>\n<\/tr>\n
SDA<\/td>\nA4<\/td>\n<\/tr>\n
VCC<\/td>\n5V<\/td>\n<\/tr>\n
GND<\/td>\nGND<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

If you\u2019re using other Arduino board rather than the uno, chek out what are their SCL and SDA pins.<\/p>\n