Real Time Clock DS1307 RTC I2C Module AT24C32 without battery
Review: 5 - "A masterpiece of literature" by John Doe, written onMay 4, 20020

Real Time Clock DS1307 RTC I2C Module AT24C32 without battery

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  • Product SKU: KG070
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The Real Time Clock DS1307 RTC I2C Module with AT24C32 EEPROM   is a versatile module commonly used for accurate timekeeping and data storage in electronic systems.

Here's an overview of the DS1307 RTC I2C module with the AT24C32 EEPROM:

Purpose: The DS1307 RTC I2C module with AT24C32 EEPROM is designed to provide accurate real-time clock functionality while also offering EEPROM data storage capabilities.

Functionality: It offers real-time clock features, including time and date keeping, and utilizes an I2C communication protocol for easy integration. The AT24C32 EEPROM provides non-volatile data storage.


Real-Time Clock: The DS1307 RTC provides accurate timekeeping with hours, minutes, seconds, and date information.

I2C Communication: The module uses the I2C (Inter-Integrated Circuit) protocol for communication with microcontrollers.

EEPROM Storage: The AT24C32 EEPROM provides non-volatile storage for data that needs to be retained even when power is off.

Backup Battery: Some versions of the module include a backup battery (often a CR2032 coin cell battery) to ensure timekeeping during power disruptions.

Alarms: The DS1307 often supports alarm settings for triggering specific actions at designated times.


Timekeeping: Used in various applications requiring accurate timekeeping, such as digital clocks, timers, and event scheduling.

Data Logging: Employed in data logging systems to timestamp recorded data while also storing additional information in the EEPROM.

Automation: Integrated into automation systems where time-sensitive actions are scheduled.

Embedded Systems: Suitable for embedded systems that need real-time clock functionality and non-volatile data storage.

Using the DS1307 RTC I2C Module with AT24C32:

Wiring: Connect the module's pins to the appropriate pins on your microcontroller or development board.

Powering the Module: Provide the module with the required power supply (often 5V) and ground connection. If applicable, insert the backup battery (CR2032).

I2C Communication: Use I2C libraries for your microcontroller to communicate with the module for both reading time and date data and accessing the EEPROM.


Backup Battery: If the module includes a backup battery, ensure that it is installed correctly and has sufficient charge for maintaining time during power interruptions.

EEPROM Data: Use the AT24C32 EEPROM for storing data that needs to be retained even when power is off.

Accuracy: The DS1307 provides basic accuracy suitable for most applications, but for higher precision requirements, more advanced RTC modules might be preferable. When integrating the Real Time Clock DS1307 RTC I2C Module with AT24C32 into a project, understanding its real-time clock and EEPROM features, I2C communication, backup battery usage, and programming considerations are essential for achieving reliable timekeeping and data storage functionality.

NOTE: Here we do not provide a Battery with a Module.

Technical Details

  • Battery: IR2032

Physical Attributes

  • PCB Size ( L x W ) mm : 28 x 28
  • Weight (gm): 7

Integration with Arduino

DS1307 RTC I2C Module

Sample Code

Additional Details

  • This is the DS1307 Real Time Clock developed by one of our designers.
  • Two-wire I2C interface.
  • Hour: Minutes: Seconds AM/PM.
  • Day Month, Date – Year.
  • DS1307-based RTC with LIR2032 battery (Battery include).
  • 1Hz output pin.
  • Consumes less than 500nA in battery backup mode with oscillator running
  • Available in 8-pin DIP or SOIC
  • Underwriters Laboratory (UL) recognized
  • Real-time clock (RTC) counts seconds, minutes, hours, dates of the month, month, day of the week, and year with leap-year compensation valid up to 2100
  • 56-byte non-volatile RAM for data storage
  • 56 Bytes of Non-volatile memory available to the user.
  • The DS1307 is accessed via the I2C protocol.
  • The module comes fully assembled and pre-programmed with the current time.

Product Video


Package Includes

  • 1 x Real Time Clock DS1307 RTC I2C Module AT24C32 without battery

Customer Reviews

Based on 5 reviews
manoj kumar
Battery included.

Battery included.

Nothing, its good

Order received earlier than the deadline. thank you for this seller.

Wayne Morgan
arduino support

does it work with arduino uno

Good piece of kit

I have been using these RTC modules for a while and, whilst they are not the most stable time keepers, they are perfectly suitable for my needs - remote monitoring of various values using Arduinos and ESP32s (temperature, pressure etc.)

dal chand
serves requirement

serves requirement