How to get an average Value of an item (OH3)

Setup, Configuration and Use Items & Sitemaps
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1

Hi,
I have programmed a blinds control. In it I retrieve e.g. temperature, wind and brightness data from a weather station on the roof. In addition, other parameters from OpenWeather for cloud cover, etc…
Now I would like to intercept not only the brightness in Lux in the respective moment, but would like to have the average value of the last 15 minutes e.g.
How can I get this average value in Openhab?

2

A simple site search would have answered that

How to ask a good question / Help Us Help You - Tutorials & Examples - openHAB Community

3

I have searched but do not think I have found what I was looking for, so here is my question. So this answer was so unfortunately unhelpful. But thank you.

1 Like
4

Example

rrd4j is included by default in OH3

5

Thanks for the tip, I’ll take a closer look!

6

Is there a Javascript way of doing this?

7

Yes, the same persistence extensions are available on the same Items.
Examples