Hi Leon,

I too use 1 minute intervals.

I wrote the code changes to automatically clear the history when it reaches 
x% full.  The current version has these changes in, so you should be OK for 
now.
But search through the list archives to find the threads about WMR300 
hanging - I have posted a patched driver that seem to fix those problems. 
For some users the WMR300 stops reporting but it has never been clear why 
this happens in the first place.

Warnings about the rain and the date mismatch would be great things to 
have, but I can't recall how far they have progressed.  I am not at home to 
check.

Cheers,
Cameron



On Sunday, 14 April 2019 06:13:33 UTC+1, Leon Shaner wrote:
>
> Hey, Cameron,
>
> You are absolutely right!  I did some digging and determined that my 
> WMR300 is set to 1 minute internal data logging interval, which is good 
> only for 22 days and has been full since 2016!  I confirmed this by moving 
> my SD card to a faster RPI and starting from a fresh weewx.sdb, and watched 
> as it pulled in less than a month's worth of data from July of 2016, then 
> said it was done processing the data from the unit.
>
> I found the right doc on how to clear the WMR300's internal data log.
> I'll set a reminder to do so every other Sunday.
>
> It would be nice if the WeeWX WMR300 driver could automatically do a 
> weekly purge of the oldest 1 week's worth of data.  That would keep it well 
> below the default 22 day limit.
>
> I saw mention in the comments in the driver that the protocol does support 
> purging of records after reading them.
> Of course what is unclear is if you do purge the oldest 1-week worth of 
> data does that actually free up space to allow the next week going forward?
> Probably deserves some experimentation.  :-/
>
> Anyway, thanks for the note.  =D
>
> Here's that doc.  Bear in mind the rain counter is reset separately by 
> touching the rain display a few times until it say "ACCUM" and then you can 
> hold the MEM button there to reset it.  If it's full it says HHH for the 
> total accumulation of rain.
>
> I think I will write a mod and submit it via github to have a warning when 
> the rain limit is at 90%.  =D
>
>

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