# Waveshare Precision RTC Module for Raspberry Pi Pico (DS3231)

**Type:** Product page · **SKU:** WS-19426 · **Brand:** [Waveshare](https://core-electronics.com.au/brands/waveshare-in-australia)
**Page:** https://core-electronics.com.au/waveshare-precision-rtc-module-for-raspberry-pi-pico-ds3231.html ([markdown](https://core-electronics.com.au/waveshare-precision-rtc-module-for-raspberry-pi-pico-ds3231.html.md))

The Pico-RTC-DS3231 is a RTC expansion module specialized for Raspberry Pi Pico. It incorporates high precision RTC chip DS3231 and uses I2C bus for communication. More external sensors are allowed to be connected thanks to the stackable design.

## Pricing

- **Price:** $14.80 (inc GST) — $13.45 AUD, exc GST
- **Quantity discounts:** 10+ $12.92 (exc GST) · 25+ $12.51 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 24 and Aug 31.

## Restrictions

Restrictions apply to this equipment as it uses button/coin cell batteries:

- The equipment is intended to be used in trades, professions or industries
- The equipment is not intended for sale to the general public
- The equipment is not intended to be used where children are present
- You are aware that this equipment may not meet child safety testing requirements as it is not intended to be used by consumers or general public, but rather, is intended to be used in trades, professions or industries in conjunction with the limitations and restrictions listed above
- You are aware that these restrictions are due to a change in [A](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence)[ustralian legislation in 2022](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence) for button/coin cell batteries
 
![Button Battery Warning](https://core-electronics.com.au/attachments/uploads/iec-button-battery.png)

A declaration of use will need to be submitted during checkout.

## Description

The Pico-RTC-DS3231 is a RTC expansion module specialised for Raspberry Pi Pico. It incorporates a high precision DS3231 RTC chip and uses I2C bus for communication. More external sensors are able to be connected thanks to the stackable design.

## Specifications

- Operating Voltage: 3.3v
- Backup Battery Voltage: 2.3v ~ 5.5v
- Operating Temperature: -40°c ~ +85°c
- Power Consumption: 100na (Sustains Data And Clock Information)

## Dimensions

![](https://core-electronics.com.au/media/wysiwyg/product_images/Pico-RTC-desc-img-3.jpg)

## Pinout

![](https://core-electronics.com.au/attachments/localcontent/Pico-RTC-DS3231-details-inter_10241aaa3c5.jpg)

## What's On Board

![](https://core-electronics.com.au/media/wysiwyg/product_images/Pico-RTC-desc-img-1.jpg)

1. **DS3231:** high precision RTC chip, I2C bus
2. **RTC backup battery:** supports CR1220 button cell
3. ****Power indicator: E****nabled by soldering a 0O resistor on the jumper, disabled by default
4. **Raspberry Pi Pico header**: For attaching to Raspberry Pi Pico, stackable design

## Documents

- [Wiki](https://www.waveshare.com/wiki/Pico-RTC-DS3231)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/p/i/pico-rtc-ds3231-1.jpg)