I am using WeeWx V4 but my brain was stuck in V3-land - I didn't realise 
the --from and --to options existed.
Moral - always read the appropriate docuementation.
Thanks everyone.
Susan

On Wednesday, 12 January 2022 at 1:18:26 pm UTC+11 gjr80 wrote:

> Perhaps I'm not understanding the issue properly but if the console/driver 
> is not emitting records then I would expect that WeeWX should not be adding 
> any records to database (archive or daily summaries).
>
> Also, not a solution to the underlying problem but if you only need 
> rebuild part of your daily summaries (which it sounds is the case) then if 
> you are using WeeWX v4.0 or later you should be able to use --date or 
> --from/--to with wee_database 
> <http://weewx.com/docs/utilities.htm#wee_database_utility> to rebuild a 
> single day only or a number of days. 
>
> Gary
> On Wednesday, 12 January 2022 at 12:01:04 UTC+10 [email protected] wrote:
>
>> Sometimes when we get a power failure, by WeeWx system recovers but the 
>> HP1000 console doesn't. This means that the WeeWx app carries on trying to 
>> access the console and also producing other reports, summary items etc., 
>> especially if the console is not recovered until after midnight. (At least 
>> this is how I interpret the situation.)
>> What this means is that there is a gap in the data in the data base: when 
>> access to the console is restored, WeeWx thinks that it records have been 
>> added even when they have not.
>> The solution is to delete all records after the last valid one before the 
>> power failure occurred but this also requires that all daily summary 
>> records be deleted (a la the various instructors such as at 
>> https://groups.google.com/g/weewx-user/c/ZXjuqhLz0UY). In y case I have 
>> 4 years worth of data in the database and therefore the '--rebuild-daily' 
>> takes forever.
>> Is there a faster way so that I can:
>> - delete the latest records after the gap
>> - do some magic step here that resets a date to say when the last valid 
>> record was 
>> - have WeeWx recover from there
>> (By the way, my HP1000 driver looks at the last entry in the database for 
>> the date from which to recover, even if the last record is 'junk' - while 
>> this may the the root cause of my problem, I don't know of a better way.)
>> Susan
>>
>

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