Displaying Items' lastupdate in sitemap?

Setup, Configuration and Use Items & Sitemaps
1

Hello!

I’m using OpenHAB and everything is working very well. Now I would like to display the lastupdate property for my items in my sitemap, but I can’t seem to find any information about how to do it without creating a new DateTime Item and updating it’s value with a rule based on changes to the original Item.

However, if I look at the Items tab on my.openhab.org/items, each item already has the last update timestamp. I would like to be able to display this on my sitemap and especially for groups.

As an example, I have a hue light:

Dimmer hueFrontPorch "Front Porch [%d %%]" (gAllLights,gDusk) {hue="4;brightness"}

and a corresponding group:

Group:Switch:AND(OFF,ON) gDusk "Dusk"

In my.openhab.org/items page, it says:

gDusk 		OFF	Today at 7:14 AM
hueFrontPorch	0	Today at 7:14 AM

I’d like to put that timestamp in my sitemap as an easy way to make sure the lights are going on and off when I expect.

So, do I need to create a rule and track these separately even though OpenHAB clearly already has them somewhere since it’s displaying them on the my.openhab?

Thanks for any pointers
Paul

2

Yes, you will need a rule to update a time. Something like this:

rule “Motion alarm Garage”

when Item Arduino_Motion01 received update

then
if (Arduino_Motion01.state == ON && Home_Alarm.state == ON) {
     	pushover("Motion in garage detected", 1)
     	postUpdate(Arduino_Motion01_Time, new DateTimeType())  }

end

item:

DateTime	Arduino_Motion01_Time	"Last Motion [%1$td %1$tb at %1$tR]"```
3

Yup, a rule and separate item is the only way I have seen how to do it…

4

That’s actually kind of surprising. you can’t pull from the persist db for the last change?

5

That is correct. The sitemap only can see Items and their current states.

6

That’s interesting. Does someone have an example for how this is being done? Thank you in advance!

7

http://docs.openhab.org/features/sitemap.html

8

Just checking if this is a feature on a todo list for future ?
ie extracting last changed date of item and make it available to sitemap

9

I don’t think it’s on anyone’s list. If it is it is a really low priority. As shown above, there is a very simple work around using Rules to make this possible.