Hi, The answer depends. If and only if your driver supports backfilling from the station then on startup WeeWX will try to backfill any records timestamped after the latest record in the WeeWX archive. So if the last record in your archive is time stamped 9:20am 11 October 2018, WeeWX would try to download any records from your station that at time stamped after 9:20am 11 October 2018. If WeeWX cannot get any records after this timestamp nothing is changed, if WeeWX can only get some records after 9:20am 11 October 2018 then only those records that were downloaded are saved to archive.
So if you want to re-download records from your station for a given time onwards you should delete all records from your archive from that given time onwards and then restart WeeWX. You can monitor what WeeWX does (did) by monitoring the log during startup. There are some caveats. If you want to re-download records from too far in the past there is the possibility that your station may not have all those records in memory and you may end up with a gap in your data. Also note that the backfill occurs from the last timestamp in the WeeWX archive, so if you want to re-download a specific period you must delete delete all records from the start of that period onwards, not just those in the period concerned. As you will be performing some destructive actions on your data I would make sure you backup your database first so you can revert to your old data if things go wrong. Gary -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
