Add-ons

How to add battery to keep rtc time

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neoe replied at Apr 12, 2016 20:27
Why not just add a ds3231 module, it works good for me.
https://n101n.xyz/n/apps.blog?id=32372

I can not connect to this link

Who can help?


I know this is an old thread, but is there a way to monitor the RTC backup battery voltage via i2C?

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