Weewx, Vantage Vue - without electricity

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kac...@gmail.com

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Jul 21, 2023, 1:11:57 AM7/21/23
to weewx-user
Vantage Vue sensors send data to its console. It works fine, I have data which are then used by Weewx and published on the website (every 15 minutes). 
In the last weeks, we have had many storms here and electricity is down. At that time, the Vantage Vue works with batteries. With WEE_DEVICE INFO I can see the interval is set to 10 (minutes?). 
After the electricity comes, I use WEE_DEVICE DUMP to get all data into the database. But while there was a really strong wind, the results are strange. Well, not strange, but it looks like there are only some records there and the wind gust are far from real. 

How do I get better results? The main problem is the wind. There are gusts and after some seconds/minutes everything can be different.
Changing interval? I know this uses more memory ... 

Greg Troxel

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Jul 21, 2023, 6:23:41 AM7/21/23
to kac...@gmail.com, weewx-user
My understanding is that the standard approach for archive interval is 5
minutes, but 10 minutes is also reasonable as you get twice the time
interval that the computer can be down wihtout data loss. IMHO there is
nothing wrong with 10. (But I am using 5 with a VP2.)

You said website 15 minutes and archive interval 10. This doesn't make
sense; weewx naturally generates reports every archive interval.

The driver should fetch the archive records and put them in the database
automatically. You should not have to run wee_device manually.

Be very careful that you have time synchronization ok on your computer.
<flame bait>If it's a toy computer like a PI :-) </> then make sure that
you either have bought and installed a RTC module or that you have
scripts to ensure that it has the correct time *before* you start weewx.


You describe the data, but you didn't provide it or a link. Measuring
wind seems tricky and it seems like quite a leap to conclude that the
hardware must have measured what you expected and that the data
processing and weewx is to blame.

My wind sensor is too close to the house, and I don't worry about it.
But I would expect that the archive record contains average wind for the
interval and the max speed over the interval. So 10 vs 5 should only
have less granular info, not miss gusts.

kac...@gmail.com

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Jul 24, 2023, 1:27:03 PM7/24/23
to weewx-user
Holly Shit. 
I wrote a long answer this morning but ... it looks like I made a mistake :-(

To be short - my main problem was because in the Weewx database wasn't a record of where the max speed was. I can see it on my console (66 km/h), but not in my database. 
I tried to correct this manually in the database, and now I have a new problem. 
It will be described in its own topic :-)
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