Plot from 2 databases

peter

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Nov 21, 2019, 2:58:28 PM11/21/19

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I managed to run 2 weewx instances taking data from the WeatherFlow and Davis stations. Data is stored to 2 database files.

Is there a (simple) way to generate a plot (e.g. temperature, wind) that combines the data from both database files? I would like to show how well the data from both stations match.

I could do it off-line by converting to csv and plot that but would prefer to have plots in realtime.

Thanks!

Thomas Keffer

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Nov 21, 2019, 6:41:50 PM11/21/19

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There's a whole section in the Customizing Guide dedicated to the topic. See Using multiple bindings.

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vince

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Nov 21, 2019, 8:04:14 PM11/21/19

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On Thursday, November 21, 2019 at 3:41:50 PM UTC-8, Thomas Keffer wrote:

There's a whole section in the Customizing Guide dedicated to the topic. See Using multiple bindings.

On Thu, Nov 21, 2019 at 11:58 AM peter <pete...@gmail.com> wrote:
I managed to run 2 weewx instances taking data from the WeatherFlow and Davis stations. Data is stored to 2 database files.
Is there a (simple) way to generate a plot (e.g. temperature, wind) that combines the data from both database files? I would like to show how well the data from both stations match.

I might add that the popular Belchertown skin does 'not' support multiple databases on one chart if I remember correctly from email with Pat a number of weeks ago.

So it might depend a little on which skin(s) you are fiddling with.

FWIW, it's easy to do in grafana over influxdb :-)

This is rain measured on a VP2 and two WF Sky units, one mounted low, one mounted high.

Screen Shot 2019-11-21 at 5.03.03 PM.png

peter

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Nov 21, 2019, 11:59:22 PM11/21/19

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Thank you both, this is awesome!
I use NeoWX but customized it a little. I’ll add the binding part (wasn’t familiar what exactly it does). If I have further question I’ll ask. Thanks for now.

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