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The High Accuracy Pi RTC is based on the clock chip DS3231, the DS3231 is a low-cost, extremely accurate I2C realtime clock (RTC). It can provide a real-time clock(RTC) for raspberry pi via the I2C interface. With the clock source from the TCXO(temperaturecompensated crystal oscillator), the RTC provides seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year.The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator.

The clock provides two programmable time-of-day alarms and a programmable square-wave output. The INT/SQW pin either generates an interrupt due to alarm condition or outputs a square-wave signal and the selection is controlled by the bit INTCN.

If you want to keep this module timing when the Raspberry Pi is powered off, you need to put a 3-Volt CR1225 lithium cell in the battery-holder.


  • Support Raspberry Pi 2/ 3 B/B+ Zero

  • Suport seconds,minuutes,hours,day of week,month, year

  • Support 24-hour or 12-hour format with AM/PM indicator

  • Low-Power Consumption

  • Two Time-of-Day Alarms

  • Fast (400kHz) I2C Interface

Typical Applications

  • Any applications need Real Time on Raspberry.

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Technical details

Dimensions 25mm x25mm x15mm
Weight G.W 13.9g
Battery Exclude

Part List

High Accuracy Pi RTC (DS3231) 1
2pin Header 1


HSCODE 8473309000
UPC 841454121831

High Accuracy Pi (RTC-DS3231)

This is the wiki page for this product, which will show you how to use the product, as well as details about the software and hardware.

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