Scale on Stat Graph cards

Configuration Frontend
1

Any way to force this card to always be 0-255 (I have some devices that vary 200-255 and they should not go from the top to the bottom, I only want things under 100 to have that dramatic of a swing).

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image1226×580 80.1 KB

2

Untested:

  1. Create a Zero sensor with “state_class: management” (since you are talking about Statistics graph).
  2. Add this sensor on the same card - it will show you a zero lower bound.
  3. Ether hide the whole legend (by a corr. option) or just zero sensor’s label (by card-mod).
3

How to set a 0 lower bound for Y-axis in statistics-graph:

Assume we have two “humidity” values:

  - type: statistics-graph
    entities:
      - sensor.home_openweathermap_humidity
      - sensor.moscow_openweathermap_humidity
    stat_types:
      - mean
      - min
      - max
    chart_type: line
    period: hour
    days_to_show: 1

изображение

Create a zero sensor with same UoM:

template:
  - sensor:
      - name:zero_value_humidity
        unit_of_measurement: "%"
        state_class: measurement
        state: 0

Add this sensor on the graph:

  - type: statistics-graph
    entities:
      - sensor.home_openweathermap_humidity
      - sensor.moscow_openweathermap_humidity
      - sensor.zero_value_humidity
    stat_types:
      - mean
      - min
      - max
    chart_type: line
    period: hour
    days_to_show: 1

изображение

Now hide a legend for this zero sensor & make it’s line less vivid:

  - type: statistics-graph
    entities:
      - sensor.home_openweathermap_humidity
      - sensor.moscow_openweathermap_humidity
      - sensor.zero_value_humidity
    stat_types:
      - mean
      - min
      - max
    chart_type: line
    period: hour
    days_to_show: 1
    card_mod:
      style:
        .content statistics-chart $:
          ha-chart-base $: |
            .chartLegend li:nth-child(n+7) {
              display: none;
            }
        .: |
          ha-card {
            --graph-color-3: #c5c5c5;
          }

изображение
Unfortunately, cannot make it transparent…

If only one humidity graph is displayed, the whole legend may be hidden:

  - type: statistics-graph
    entities:
      - sensor.home_openweathermap_humidity
      - sensor.zero_value_humidity
    stat_types:
      - mean
      - min
      - max
    chart_type: line
    period: hour
    days_to_show: 1
    hide_legend: true
    card_mod:
      style: |
          ha-card {
            --graph-color-2: #c5c5c5;
          }

изображение

Here an undesired glitch may be seen - a hidden line may be selected:
изображение
Do not select it then )))

Similar for history-graph

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