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DS3231M Precision RTC Real Time Clock Module

SKU: 018-DS3231-2

$7.99 AUD, inc GST
$7.26 AUD, exc GST

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DS3231M Precision RTC Real Time Clock Module

SKU: 018-DS3231-2

$7.99 AUD, inc GST
$7.26 AUD, exc GST
1 reviews 0 5 5


  • $6.95 Standard (2-4 days, tracked)
  • $8.95 Express (Overnight*, tracked)
  • $3 Economy Post* (3-7 days, no tracking)
  • FREE Pickup (Newcastle only)

Shipping costs may increase for heavy products or large orders.

Exact shipping can be calculated on the view cart page.

*Conditions apply, see shipping tab below.

This product has been retired and kept here for reference.

DS3231M is an extremely accurate I2C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator.

Save precious cycles on your micro as the RTC maintains seconds, minutes, hours, day, date, month and year information in easy to access registers. On top of that, the DS3231M manages leap years and has two configurable alarm clocks.


  • Size: 38mm (length) * 22mm (W) * 14mm (height)
  • Operating voltage: 3.3 - 5 .5 V
  • DS3231M at the core
  • Clock Accuracy: 5ppm 0-40 ºC
  • Two programmable alarms
  • Programmable square-wave output
  • DS3231M Datasheet
  • LIR2032 / CR2032 backup battery holder for uninterrupted time management (battery not included)

Wiring instructions (with Arduino Uno R3 for example):

  • SCL → A5
  • SDA → A4
  • VCC → 5V
  • GND → GND


This product is listed in:

Documentation and Resources:
  • The Maker Revolution
  • The Maker Revolution celebrates the creation of new devices and the modification of existing ones - the transition from a consumer buying goods to eventually having a major part in their creation. The Maker Revolution places strong emphasis on free (...

Product Comments

Customer Reviews

  1. Review by Michael verified purchaser

    Easy to use with the Arduino but remember to remove R5 (200R) if using a non rechargeable battery such as CR2032 (Posted on 14/01/2016)

Exact shipping can be calculated on the view cart page (no login required).

We deliver Australia-wide with these options:

  • $3 for Small Items (3-7 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.95 for Express Post (Overnight for Australia Post Next Day Network, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address:

Unit 18, 132 Garden Grove Parade
NSW, 2289

Please checkout our customer service page if you have other frequently asked questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.