I think this is a bug

[funkoid]

Here are 2 screenshots taken about 20min apart. The first illustrates the green shaded area (Heating on) correctly and the second shows the opposite with the Idle state as shaded green. At the bottom is the HVAC Heating state.

The yaml hasn't changed between the 2 snapshots. I can post if necessary. Has anyone seen this before and knows how to solve it?

For those interested what I'm showing there are 3 sensors; 2 that measure the rate of temperature change at the thermostat and the ground floor and the third is the HVAC Heating state. The HVAC Heating state sensor only reports if it is heating or idle, if the fan is running it reports it as idle.

If I've posted this in the incorrect forum please let me know.

[dbuezas]

Can you post the yaml?
I don't know how fill: tozeroy works with categorical (non numerical) axes.

[funkoid]

Here is the yaml.

type: custom:plotly-graph
entities:
  - entity: sensor.thermostat_temp_change_rate
    name: thermostat
    yaxis: y1
  - entity: sensor.home_temp_change_rate
    name: ground floor
    yaxis: y1
  - entity: sensor.hvac_heating_state
    name: Heat
    fill: tozeroy
    yaxis: y2
    ys:
      - idle
      - heating
    filters:
      - map_y_numbers: "state === 'heating' ? 1 : 0"
hours_to_show: 4
refresh_interval: 120
layout:
  yaxis:
    title: Temperature Change Rate
    zeroline: true
    zerolinecolor: white
    zerolinewidth: 2
  yaxis2:
    title: HVAC State
    overlaying: "y"
    side: right
    range:
      - -0.5
      - 1.5
    tickvals:
      - 0
      - 1
    ticktext:
      - idle
      - heating
    zeroline: true
    zerolinewidth: 2
    zerolinecolor: rgba(68, 68, 68, 0.7)

[dbuezas]

Try with

- map_y: "y === 'heating' ? 1 : 0"

[dbuezas]

By the way, instead of mapping to numbers and then changing the tick text, you can plot the text directly and lock the label ordering:

#424

[funkoid]

Thank you. I've made the change and will monitor the graph for the next 24 hours and report back if now consistently shows the data correctly.
I'll look into the other way of mapping the text.
I was also looking to have the y1 and y2 axis align with 0 on the left and idle on the right, is there an option\setting to achieve that?

[funkoid]

Looks like the problem has been resolved. Thanks.