2026.6.3
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Display a chart

The Display a chart action plots a list of numbers as a small chart on your LaMetric device. It is handy for showing trends at a glance, such as recent energy usage, temperature, or any other numeric value from your home.

Using this action from the user interface

If you prefer building automations and scripts visually, Home Assistant walks you through this action step by step. You pick what to target, tweak a few options, and save. No YAML knowledge required.

To display a chart from an automation or a script:

  1. Go to Settings > Automations & scenes.
  2. Open an existing automation or script, or select Create automation > Create new automation.
  3. If you’re setting up a new automation, add a trigger in the When section. Scripts don’t need a trigger. They run when something else calls them.
  4. In the Then do section, select Add action.
  5. From the search box, search for and select LaMetric: Display a chart.
  6. Select the LaMetric device to display the chart on.
  7. Enter the data points to plot in the Data field.
  8. Optional: set a sound, the number of cycles, an icon type, and a priority.
  9. Select Save.

Options in the UI

Device

The LaMetric device to display the chart on.
Data

The list of data points to plot, as numbers. For example, [1, 2, 3, 2, 1].
Sound (Optional)

The notification sound to play. See Notification sounds for the full list.
Cycles (Optional)

How many times to display the chart. Set to 0 to keep it on screen until it is dismissed.
Icon type (Optional)

The type of icon to display, indicating the nature of the notification. One of none, info, or alert.
Priority (Optional)

The priority of the notification. When the device is running in screensaver or kiosk mode, only critical notifications are accepted. One of info, warning, or critical.

Using this action in YAML

If you work directly in YAML, or you want to know exactly what Home Assistant does under the hood, this section has the technical reference. It lists the field names you use in YAML, their types, and which ones are required.

In YAML, refer to this action as lametric.chart. A basic example looks like this:

ActionActions are used in several places in Home Assistant. As part of a script or automation, actions define what is going to happen once a trigger is activated. In scripts, an action is called *sequence*. [Learn more] 
action: lametric.chart
data:
  device_id: 1234567890abcdef1234567890abcdef
  data: [1, 2, 3, 2, 1]

This plots a five-point chart on the LaMetric device with the given ID.

Options in YAML

device_id string Required

The ID of the LaMetric device to display the chart on.

data list Required

The list of data points to plot, as numbers. For example, [1, 2, 3, 2, 1].

sound string

The notification sound to play. See Notification sounds for the full list.

cycles integer

How many times to display the chart. Set to 0 to keep it on screen until it is dismissed.

icon_type string

The type of icon to display, indicating the nature of the notification. One of none, info, or alert.

priority string

The priority of the notification. When the device is running in screensaver or kiosk mode, only critical notifications are accepted. One of info, warning, or critical.

Try it yourself

Ready to test this? Open Developer tools > Actions, search for this action, fill in the fields, and select Perform action. You see what happens on your actual entitiesAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more] without writing a line of YAML.

More examples

Real scenarios where this action shows up in automations and scripts. Copy any example and adapt it to your setup.

Tip

You don’t need to edit YAML to use these examples. Copy a YAML snippet from this page, open the automation editor in Home Assistant, and press Ctrl+V (or Cmd+V on Mac). Home Assistant automatically converts the pasted YAML into the visual editor format, whether it’s a full automation, a single trigger, a condition, or an action.

Automation: show a temperature chart every 10 minutes

Plot the last few temperature readings on the LaMetric device on a schedule.

  • Trigger: Time pattern: every 10 minutes
  • Action: LaMetric: Display a chart
    • Device: LaMetric TIME
    • Data: [18, 19, 20, 21, 20, 19]
    • Priority: info
YAML example for a temperature chart
AutomationAutomations in Home Assistant allow you to automatically respond to things that happen in and around your home. [Learn more] 
alias: "Show temperature chart on LaMetric"
triggers:
  - trigger: time_pattern
    minutes: "/10"
actions:
  - action: lametric.chart
    data:
      device_id: 1234567890abcdef1234567890abcdef
      data: [18, 19, 20, 21, 20, 19]
      priority: info

Still stuck?

The Home Assistant community is quick to help: join Discord for real-time chat, post on the community forum with the action you’re calling and what you expected to happen, or share on our subreddit /r/homeassistant.

Tip

AI assistants like ChatGPT or Claude can also explain actions or suggest the right one when you describe what you want in plain language.

Related actions

These actions work well alongside this one: