[SOLVED] Quick persistence (REST) question

Add-ons Persistence Services
,
1

All,

I am using influxdb for persistence successfully (I assume) on my RPi4 8GB with SSD and openhabian running OH 3.0.1 stable.

When I access the rest / persistence (http://homer:8080/rest/persistence/items/Ind_Temp) from a browser I can only see values of one day ago until now.

For the item above (Indoor Temperature), however, I can see graphs in habpanel many weeks back.

So my question is: Is there a limitation of the rest / persistence call by URL to a certain time period or should it theoretically reflect all the historic data?

2

Which is your default persistence service? I’m thinking you are looking at rrd4j data, which falsely appears to have limited history because of the way its stored.

3

My default is influxdb

grafik
grafik1280Ă—270 11.3 KB

and rrd4j is not installed (influxdb 3.1.0 is run from the addons directory)

grafik
grafik738Ă—236 8.61 KB

4

As it says in the REST API Docs:

Start time of the data to return. Will default to 1 day before endtime. [yyyy-MM-dd’T’HH:mm:ss.SSSZ]

Did you supply Start time in your query?

1 Like
5

Thanks, Rich - No, just called the url above.

And checked https://www.openhab.org/docs/configuration/restdocs.html beforehand, but did not find the hint you just sent.

Which (other) docs do you refer to?

6

Rich posted the sentence which is directly on the API Explorer (rest/persistence/items/itemname). No other docs needed!

7

image
image2754Ă—1622 301 KB

8

Thank you, @opus and @rlkoshak

I did not even know this function!
OH3 always suprises me :slight_smile:
That’s awesome.

I was talking about calling the url in the browser “normally” not with this great interface!

9

It’s mentioned in the docs as well. openHAB REST API | openHAB. In OH 2 it was a separately installable add-on.

10

Thanks, Rich.
There is obviously still a lot for me to learn about OH3 (which really contains massive improvements :slight_smile: