Description
This is a module containing an I2C DS3231 Real Time Clock, AT24C32 I2C EEPROM.
Battery is optional and not included, you can use a standard CR2032 battery to keep the clock running when the board is powered off.
I have written a very simple to use Arduino LIbrary to make using this module very easy indeed: DS3231_Simple ( https://tinyurl.com/28b3a7fh )
Using my library you can:
Set the time/date
Read the time/date
Set up to 2 alarms (one at seconds precision, one at minutes)
Read the temperature with up to 0.25 Degree precision
Write arbitrary data in log entries to the EEPROM together with the timestamp.
Read said log entries.
The logging works as a "circular buffer", so if it fills up it over-writes older entries, and extends the lifetime of the EEPROM.
**Note: **These boards have been modified to disable battery charging so you can use a standard CR2032 battery in them for battery backup.
See all my listings: https://tinyurl.com/26tzbx6d
Details
Shipping & pick-up options
| Destination & description | Price | |
|---|---|---|
| Nationwide 1-2 days, Express Urban | $5.70 | |
| Nationwide 2-4 days, Rural | $11.70 | |
| Combine with another item you've paid shipping on | $0.00 | |
| Shipping more than one item | No extra charge | |
Estimated delivery times in business days
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Questions & Answers (3)
FAQs: All stock is in Christchurch. Express Urban and Rural Standard is with Courier Post (NZ Post Courier), PO Box welcome. Pickup is not possible sorry. Tracking and GST Invoice links are emailed when shipped - CHECK YOUR SPAM. Combined shipping means you pay shipping on one item, and choose "Combine with another" on the rest. Seller comment Monday, 23 March 2026 HOW TO SAVE WITH COMBINED SHIPPING: Use the Trade Me cart or purchase each separately - choose Urban or Rural shipping option (not Economy) on one item, and choose "Combine with another" on the rest - NO LIMIT! Seller comment Monday, 23 March 2026 RURAL DELIVERY: Rural dwellers, if you have a Woolworths or NZ Post nearby did you know you can use a Parcel Collect address with NZ Post so you only have to pay urban shipping? Google NZ Post Parcel Collect to register. Seller comment Monday, 23 March 2026
Real Time Clock + EEPROM with Easy Arduino Library
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