Question regarding non-Pro th0temp-delta24h

[saratogaWX]

Looking at the docs in the wiki indicates that th0temp-delta24h should return the difference between th0temp-act and the value 24 hours ago (in Celsius)

I'm definitely not getting the expected values when compared to other weather software (CumulusMX, WeatherCat, Weather-Display).

Is this -delta24h selector not usable with temperature and/or Pro models??

Can Boris please explain.

Regards,
Ken

[admin]

In order to calculate the difference the data from exactly 24h in the past needs to be there. This could only be achieved by logging the data for at least 24h which needs storage Meteobridge on router platforms (mainly TP-link) do not provide.
To make use of this you need a PRO/PRO2/NANO SD or RPI running Meteobridge.

[Mattk]

What are the sorts of differences being noted from what is expected?

On a Pro (red) I see a diff of maybe 0.1°C "at times" using -delta24h which one might put down to not being able to actually be exactly 24 hours on the dot to the second etc between current/act and 1 decimal, 1 minute Temp data archive which would include some averaging or rounding (depending) relative to irregular and inconsistent variable rates of change?

Also I believe the -delta24h is quite different to say comparing (th0temp-act] to th0temp-val@h24] where @h24 is the average of the encompassing whole hour 24 hours behind which can be quite different to any minute comparison within the hour.