Sitemap show last action

[antares2001]

Hello,

I would like to have an item in my sitemap that displays the last action that was performed. This could be for instance “Turned on light kitchen (8:04pm)” or "Scene turn off the lights (11:00pm).

Is it possible to somehow get such an information displayed on a sitemap? In the logs they usually show up as “LIGHT_kitchen changed from ON to OFF” with a prepended date and time, so I thought it should be possible to get this somehow done. However, I haven’t yet managed with reasonable effort.

Anybody an idea / a hint how to get this accomplished?

[rossko57]

Create a String Item and populate it from individual Rules. This is tedious, but you get to choose which events are of interest and what detail to include depending on event. You might for instance want to log “Motion detector activated” but not “Motion detector idle”

This might be of interest

Display history of events in app

I use the notifications for a number of things, but when they occur my phone dings… I would like to have a section of my sitemap (a page in the app) that shows a different history but I am not sure if there is an easy way to do it. The hard way is to have 10 or 20 (or N) items and when the top one changes move the last entry down one slot to make room for the new one (example below) Is there a way I can use Persistence (like mysql) instead? Tom // Example pseudo-code items Log_Current, Lo…

[antares2001]

Hello @rossko57,

thank you for your reply. That was not what I was looking for, as there is several issues with it and first and foremost: doesn’t that mean a rule for every single item? Or is there something easier than

rule "Change Detect"
when
Item a changed or
Item b changed or
Item c changed
then
logInfo(“FILE”, “Item " + … + " changed”)
end

How can I tell, which of those items changed?

Since I realized, the more rules I have, the slower OpenHAB gets on the Raspberry Pi, I wouldn’t want tens of rules declaring each item separately. I already thought of a changedItemGroup but unfortunately groups are no solution, as an “OR” only triggers for the first member and also they don’t seem to help when having mixed items like switches, door contacts and roller shutters.

Any idea?

[rossko57]

@antares2001

doesn’t that mean a rule for every single item?

Essentially, yes. It’s the method I use (although I am not constrained by Pi performance). But go back a step and think about what you want - do you really want ‘every single Item’? Or every single change? Say you are polling a temperature sensor or suchlike, that will almost always be the last thing to have changed.

I have very few rules that just update the “log” Item though - the stuff I am interested in is usually being dealt with in some rule already - doors being opened, switches switched etc. So the line to update the log just fits into an existing rule, and I have it say something meaningful rather than just note a change.
I’m logging events of interest, not temp change from 17.1 to 17.2

@antares2001

How can I tell, which of those items changed?

This is quite a common request, a typical solution here

Get the member of a Group that triggered the rule

Many run into a situation where they want to have a rule triggered by updates to a Group or have multiple Item triggers but want to know which Item triggered the rule. OH’s Rules DSL does not have this capability built in (I’m told the JSR233 Rules Engine does if you are on OH 1.x and good with JavaScript or Jython). There is a simple way to do this. Set up persistence on all the Items that can trigger the rule. If your rule is triggered by multiple Items instead of a Group, make sure the…

That does have limitations and will not work well here I think (multiple triggers).

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If you really want a global last item changed, It should I think be possible to write an external script that parses out the last line of openhab.log, examines it see if it was an Item change, and returns it. I do not know how to go about that.