DS3231 RTC Module Precise Real Time Clock I2C AT24C32

The DS3231 RTC Module Precise Real Time Clock with AT24C32 is the high-accuracy upgrade to the DS1307 real time clock module — where the DS1307 relies on an external 32.768kHz crystal that drifts with temperature changes, the DS3231 has a Temperature Compensated Crystal Oscillator (TCXO) built directly into the chip that automatically corrects for temperature-induced frequency variations and maintains timekeeping accuracy to ±2 parts per million from 0°C to 40°C. In practical terms, ±2 ppm translates to approximately one second of drift per month — compared to a DS1307 which can drift by a minute or more per month under the same conditions — making the DS3231 the correct choice for any project where the clock must remain accurate over weeks and months without manual correction.

The ds3231 rtc module operates from 3.3V to 5V DC, directly compatible with both 5V Arduino boards and 3.3V boards such as ESP32 and Raspberry Pi without a level shifter on the I2C lines — an advantage over the DS1307 which requires 5V. The rtc module arduino board also includes an onboard temperature sensor that the DS3231 chip reads internally to perform its compensation, and this temperature value is accessible to the Arduino through the I2C interface as a useful secondary reading for the project. The AT24C32 32Kbit EEPROM chip on the same board provides non-volatile data storage on a separate I2C address (0x50) alongside the DS3231’s I2C address (0x68).

The ds3231 real time clock module’s CR2032 battery backup maintains timekeeping through power interruptions for months on a single cell. Available from StemVolt. This rtc module real time clock ds3231 is ideal for high-accuracy Arduino ESP32 data logging alarm and precision timekeeping project builds in India.

Related Product:

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Features:

• 2ppm TCXO accuracy — approximately one second drift per month
• 3.3V to 5V — works with Arduino ESP32 and Raspberry Pi directly
• Onboard temperature sensor readable alongside clock data via I2C
• AT24C32 32Kbit EEPROM on separate I2C address for data storage
• CR2032 backup maintains time through power interruptions for months

Technical Specifications:

Applications:

• High-accuracy Arduino clock display with month-long drift-free timekeeping
• STEM project for rtc module arduino temperature-compensated clock demo
• Long-term unattended sensor station needing months of accurate timestamps
• ds3231 real time clock for TCXO precision timekeeping experiment

Package Includes:

• 1 x DS3231 RTC Module Precise Real Time Clock I2C AT24C32

NOTE: A CR2032 coin cell battery is not included with this DS3231 RTC Module