anyone have luck with these DS3231 modules?

Using Arduino Project Guidance
1

I like that these are so small, and of course they can be had even cheaper from Ali-express.

https://www.ebay.com/itm/172791484279

But what am I missing out on compared to the bigger boards with multiple chips some of you have been using, like these...

https://www.ebay.com/p/IIC-Precision-RTC-Real-Time-Clock-Memory-Module-for-Arduino-Ds3231-At24c32/551142621

If its just extras like eeprom memory or frequency outputs brought out to pins, the smaller ones would be better for a lot of projects. But if its something more important (like no I2C support), well... thats why I'm asking! :slight_smile:

2

I thought they were the same, but no pin duplication and a smaller battery.

3