On Thu, 14 Jun 2018 06:04:04 +0000, A. Dumas wrote:

> Martin Gregorie  wrote:
>> Agreed - you only need a hardware RTC if your RPi isn't usually
>> connected to the 'net.
>
> He gave a reason.

Fair enough - I'd have put a delay in the WeeWX startup.

To the OP - if the RPi + weather station is normally run 24x7, then the
RTC battery will probably die of old age rather than because it got
drained. I see that AdaFruit say it should last 5 years, which looks as
though that's its shelf life. Don't forget that the RTC uses little power
and that the coin cell only powers the RTC when the RPi is powered off.

Given that the RTC you've chosen isn't temperature compensated, whether
its driver will periodically sync it to Internet time would concern me
more than monitoring its backup battery, but of course ymmv.


--
Martin    | martin at
Gregorie  | gregorie dot org

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