I would like to have some temperature values in my charts and although I´ve added everything and also set the persistance, no values are displayed in the chart.
The chart item itself is shown well, but apart from hours on the x-line and “0” on the y-line, there is nothing.
I´ve setup several charts in the same manner for other temperature sensors, they work fine.
Could someone kindly tell me what I´m doing wrong here?
Item: Number Sauna_Temperatur "Sauna Temperatur [%.1f C]" { channel="zwave:device:95123ab1:node38:sensor_temperature3" }
I you have the REST Documentation installed, you could check the actual entries in the database. If you haven’t installed, it can be found on PaperUI under Addons-Misc.
Go to http://YourOpenHAB_IP:8080/start/index
and select the REST Api
Open the Persistence GET /persistence/ items/{itemname} page
On that page insert “rrd4j” as serviceID and the item name in question. Hit the " Try it out" button and you should get a response with all values stored for the last 24 hours.
If you get no values, the setup probably needs a stop of openhab, delete the rrd file and start openhab.
You haved other itemes that are persisted and that do show in a chart. Assuming that those items use rrd4j as well the failure can’t be the missing setting for the querried persistence service (Could either be set in the Chart line or the Default as set in PaperUI could be used).
The actual values of the item shows on the sitemap, so you are using the correct channel.
You have a rrd file, hence the items at least has been persited once, hence the problem is NOT to be found in the rrd4j.cfg.
You did stopp openhab, delete .rrd file in question and restarted openhab. After that the .rrd file was recreated. Agian the problem is NOT to be found in the rrd4j.cfg.
What was the result on the check via the REST API?
As a LAST try I would delete the item and recreate it, either via the .tems file or via PaperUI (depending on how you create items).