[SOLVED] Items: difference between "changed" and "received update"

Hello Community,
short question concerning rules:

What’s the difference between

when item xxxxx changed

and

when item xxxxx received update

?

Is there an explanation available somewhere in the documentation or here in the community threads?

Thanks and regards
Christoph

Take a look at

https://docs.openhab.org/configuration/rules-dsl.html#manipulating-item-states

There is a table, that has some explanation about it.
This should help you for a basic understanding. :slight_smile:

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The difference is, that “received update” will fire even if the status is the same. “Changed” only if really changed.

For example:
Temperatur sensors send value every 5min.

received update will trigger even if it is the same temperature, changed not.

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Thank you!