Meteohub Update 2.6f (experimental)

[admin]

DEUTSCH

Nach wie vor gibt es viele kleinere Änderungen an der WD Live Schnittstelle von Meteohub. Daher folgen zur Zeit Updates in kurzer Folge, um hier den Feldtest zu ermöglichen.

Link: http://www.meteohub.de/joomla/index.php ... &Itemid=29

Änderungen gegenüber V2.6e:

* Ergänzt WD-Live Daten zu Temperatur, Luftdruck und Feuchte um Trendinformationen. Der aktuelle Wert wird gegen das Mittel der letzten 60 Minuten verglichen. Wenn die Differenz größer als 2% (Feuchtigkeit), 0.5° (Temperatur) oder 1 hPa (Luftdruck) ist, wird eine fallende oder steigende Tendez angezeigt.
* Ergänzt WD-Live Daten bei Wind- und Böen-Maxima um Informationen um die Windrichtung.
* Hinweis: Bitte "Speichern" auf der "WD-Live" Seite drücken, um die Änderungen wirksam werden zu lassen.

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ENGLISH

There are still quite a few changes regarding Meteohub's WD live interface. I punch out updates in a fast frequency to give you a chance to test these.

Link: http://www.meteohub.de/joomla/index.php ... &Itemid=29

Changes since V2.6e:
* Adds information about trend of temperature, humidity and pressure to WD Live data feed. Actual value is compared to the average of the last 60 minutes. If the difference is more than 2% (Humidity), 0.5°C (Temperature) or 1 hPa (Pressure) a falling or rising trend is signaled.
* Adds information about direction of wind and gust maximum to WD Live data feed.
* Remark: Please press "save" on "WD Live" page to make these changes reality.

[wfpost]

Thanks for that.
However pressure trend doesn´t seem to work.
TEMP and HUM do, but pressure trend is Zero when using the known clientraw parser.

At the moment at my location pressure is falling with the trigger values mentioned and the baro trend arrow on my VP2 displays it.

raw data from sensor:
last24h_thb0_press_trend -1
day1_thb0_press_trend -1
hour1_thb0_press_trend 0

[admin]

pressure trend detection will be more reactive in the next update (0.5 hPa in one hour). As I don't have a 3 hour look-back but just a 1 hour look-back and some weather stations only report full hPa, I was reluctant on setting the threshold too low.

We 'll see if 0.5 hPa per hour is a good approach for pressure tendency detection.

[sevenless]

Although Meteohub lacks three-hour history as a defined wildcard, there is easily accessed historical data in the form of [seqhour1_thb0_sealevel_hpa], which I already parse via php to provide my own approximation of three-hour barometric trend similar to the VantagePro2 console.

Can that data be utilized to provide a longer time frame for generating trend data?

[wfpost]

with the data exported from meteohub to wswin, wswin calculates the barometric trend for 1h/2h/3h/6h/12h periods.
What´s the reason meteohub hasn´t that info available as well?

[admin]

all the truth is in the raw data, and one can generate nearly everything from that... so in general everything is possible, no doubt :-)

At the moment Meteohub doesn't take care of detailed baro trend analysis and the processing streams are simply not focusing on that. I have realized a simple trend analysis for the given time resolutions, but these doesn't seem to map too well for baro trends, as a one hour period with changes in the decimals will not work well for detection of trends with weather stations just reporting full hPa.

I will think of this during my holidays, I don't see a quick hack for that. Until then the slightly squeezed analysis of coming 2.6g might already bring a slight improvement.

[wfpost]

Hallo Boris,

what´s the current status on the barotrend front?
Today with my Davis VP2 pressure is in a steep fall, but barotrend data in WDL isn´t reflecting that situation.
Arrow shows pressure unchanged.

Do you plan to improve the feature in future updates?

Cheers,
Wolfgang