Define custom data upload

[spoetnik]

I would like to define a custom data upload, just like a custom defined graph, would this be possible?

I would like to upload a data file every minute that has a reading per second of the following sensors:
Wind-Direction,
Wind-Speed,
Wind-Gusts,
Temperature,
Pressure,
Humidity

So this file would have 60 readings of each of these sonsors, 60 times the wind-direction, then 60 times wind-speed etc.

This way I could build a script that looks like a real-time measurement of the data, with a 1 second interval, but only a one minute delay.

Any suggestions on how to realize this??

Thanks

[wfpost]

no weather station does deliver sensor values every second?
Not even the best - the Davis VP2 - does that.
Wind sensors fire data every 2.5s
Temp sensors every 40s

You can´t get more realtime than your weather station.

[spoetnik]

You have got a point there.

There are stations that does 1 second udates :http://www.windmeting.nl/

Mine does a gust interval of 11 seconds, so a 15 second update would be a nice interval.

I think I will have to look into the live http datalogging protocol with a 15 send interval.

[wfpost]

yes, that Dutch site looks very good, but I could not figure out which hardware is there behind the webinterface. Do you know?

BTW: The rapidfire concept of wunderground isn´t bad either: meteohub supports the nearly realtime upload of sensor data to the Michigan-based weathernetwork.
Here´s one of my sites working with rapidfire:
http://wetterstation-buch.de/rapidfire.htm

If only wunderground was to allow creating your own instruments it would be top!

[spoetnik]

is a WXT510, and that script is a custom build.
It is AJAX-powered, and askes the data of the last 10 seconds. So an update every second, with a delay of 10 seconds.

[wfpost]

nice gadget, but this Finnish product seems to have some serious design problems with wind velocity.
In areas with snowfall the accurancy of the wind measurement seems to deliver fantasy values.
All discussed with that German meteo-forum:
http://www.wetterstationen.info/phpBB/v ... c&start=30

Really bad, if one pays nearly 2000€ and getting very wrong wind results.

[skyewright]

no weather station does deliver sensor values every second?
Not even the best - the Davis VP2 - does that

I don't feed meteohub every second but I am checking wind every second with a custom meteohub plugin reading a 1-wire system.
I poll the anemometer counter every second and calculate the speed over the previous 3 seconds, i.e. a 'rolling' 3 second time frame.

Once a minute I send a wind sensor record to Meteohub with the average speed over the whole minute and the highest 3 second gust (& direction).

<off topic, but...>
Actually, as this is still in an experimental phase I'm having the plug-in send 4 wind sensor records (i.e. wind5, wind6, wind7 & wind8) based on the same data with gusts viewed over different time frames! The average wind
is the same for all 4 'sensors'. The gust speeds are the max for the minute in a 14 sec fixed frame (like my OS anemometers), 3 second fixed frame, 3 second rolling frame (as described above) and 1 second.

The 3 second gusts are often 25% or more above the 14 sec. The rolling 3 second is often a fraction higher than the fixed 3 second. The 1 second gust (too short to be properly called a gust) can easily be 10% higher still.
My gust maxima this month are:
14s fixed => 70.2 mph
3s fixed => 75.2 mph
3s rolling => 77.2 mph
1s => 84.1 mph
All 2008-08-15 19:31 BST
The 14 s managed pretty well on that ocassion but is was a very sustained squall; the average speed over the whole minute was 64.6 mph. Pretty breezy for August!
</off topic>

As for updating my website, I'm quite happy with a 5 minute interval for that! :laugh: