Persistent notification

The persistent_notification can be used to show a message on the frontend that has to be dismissed by the user.

Service

The service persistent_notification/create takes in message, title, and notification_id.

Service data attribute	Optional	Description
`message`	no	Body of the notification.
`title`	yes	Title of the notification.
`notification_id`	yes	If `notification_id` is given, it will overwrite the notification if there already was a notification with that ID.

The persistent_notification component supports specifying templates for both the message and the title. This will allow you to use the current state of Home Assistant in your notifications.

In an action of your automation setup it could look like this with a customized subject.

action:
  service: persistent_notification.create
  data:
    message: "Your message goes here"
    title: "Custom subject"

The service persistent_notification/dismiss requires a notification_id.

Service data attribute	Optional	Description
`notification_id`	no	the `notification_id` is required to identify the notification that should be removed.

This service allows you to remove a notifications by script or automation.

action:
  service: persistent_notification.dismiss
  data:
    notification_id: "1234"

Create a persistent notification

Choose Services from the Developer Tools to call the persistent_notification service. Select persistent_notification/create from the list of Available services: and enter something like the sample below into the Service Data field and hit CALL SERVICE.

{
  "notification_id": "1234",
  "title": "Sample notification",
  "message": "This is a sample text"
}

This will create the notification entry shown above.