OH4 Chart Page shows wrong data

[Chriss89 (Christian Nordheider)]

Hello everybody,

I have an issue with the visualiztion of the data from my persistance.
I’m running OH 4.0.4 as a VM
Hardware: QNAP TS451+ 16 GB Ram, Intel Celeron J1900
VM: CPU Passthrough 2 cores and 4 GB Ram 250GB Storage (18GB in use) Debian 10 buster
Java: openjdk full version 17.0.8+.-LTS

I have got an Item (Strom_heute) which is upated every 5 minutes by a rule. Thsi item is configured as a Number:Energy.
This item shows the current consumption of electric energy of the present day.

This value will be set to 0 by a second rule every day at 0:00.
If I analyse this item via the integrated item analyzer of a lable list item I get 28.742 as last value.
This is also the value which I can find directly in the rrd4j file when I open it with the rrd4j inspector.

If I visualize the same item in a chart page as an aggregat series with the aggregation function “Last”, I receive 28.503 as last value.
I receive the same value if I change the aggregate function to “Maximum”.

Where is my mistake or why is the aggregate series showing the wrong (in my eyes) last value?

Christian Nordheider

[Tuny (Sebastian)]

@Chriss89

If I visualize the same item in a chart page as an aggregat series with the aggregation function “Last”, I receive 28.503 as last value.
I receive the same value if I change the aggregate function to “Maximum”.

Can you please share the code of your aggregate page?
Can you explain a little what you expect the page should look like in your opinion?

Maybe this is a thopic that might be interesting for you:

Displaying delta-values in charts?

I do have classical items, which just add consumption of energy, water, … Is there a way to display delta-values from one item? What I’d like to achieve is: daily consumption perhaps weekly and monthly consumption based on just on value-increasing item. Or do I need a virtual proxy item, which gets filled daily/weekly/monthly…?

[STSC]

What is the last value of Nov 17th in the Inspector.

[Chriss89 (Christian Nordheider)]

Code of my aggregate page:

config:
  chartType: month
  label: Stromverbrauch
slots:
  grid:
    - component: oh-chart-grid
      config:
        height: "450"
        show: false
        top: "100"
  legend:
    - component: oh-chart-legend
      config:
        orient: horizontal
        top: "50"
        type: scroll
  series:
    - component: oh-aggregate-series
      config:
        aggregationFunction: last
        dimension1: date
        gridIndex: 0
        item: Strom_heute
        name: Stromverbrauch
        transpose: false
        type: bar
        xAxisIndex: 0
        yAxisIndex: 0
        markLine:
          data:
            - type: average
  tooltip:
    - component: oh-chart-tooltip
      config:
        confine: true
  xAxis:
    - component: oh-category-axis
      config:
        categoryType: month
        gridIndex: 0
        monthFormat: short
        name: Tag
        nameGap: 30
        nameLocation: center
        weekdayFormat: short
  yAxis:
    - component: oh-value-axis
      config:
        gridIndex: 0
        name: kWh
  dataZoom: []
  toolbox:
    - component: oh-chart-toolbox
      config:
        show: true
        presetFeatures:
          - saveAsImage
          - restore
          - dataZoom
        left: Left

Last value in the inspector for Nov 17 is 21.053 the same as the analyzer.
The aggregation page shows 20.9