Automation not working - getting friendly_name from trigger.entity_id

1

I have the following automation

- id: '1600800443864'
  alias: Canon Printer needs attention
  description: ''
  trigger:
  - platform: numeric_state
    entity_id: sensor.cnlbp622c_623c_canon_cartridge_054_black_toner
    below: '10'
  - platform: numeric_state
    entity_id: sensor.cnlbp622c_623c_canon_cartridge_054_cyan_toner
    below: '10'
    for: 0:05:00
  - platform: numeric_state
    entity_id: sensor.cnlbp622c_623c_canon_cartridge_054_magenta_to
    below: '10'
    for: 0:05:00
  - platform: numeric_state
    entity_id: sensor.cnlbp622c_623c_canon_cartridge_054_yellow_ton
    below: '10'
    for: 0:05:00
  condition: []
  action:
  - service: notify.glenn_telegram
    data:
      message: '"{{ trigger.entity_id.attributes.friendly_name }} toner on the Canon
        Laser Printer is running low."'
  mode: single

In the message of the action, if I have it as shown, nothing at all happens and I get the following error.

homeassistant.exceptions.HomeAssistantError: Error rendering data template: UndefinedError: 'trigger' is undefined

If I change the template to

{{ state_attr('trigger.entity_id', 'friendly_name') }}

then the notification goes out, but is says “none toner on the Canon Laser Printer is running low.”

Below is an example of the attributes of the sensors being triggered against

marker_low_level: 7
marker_type: toner
unit_of_measurement: %
friendly_name: Black
icon: mdi:water

I have searched the forums and only found older messages that recommend the 2 methods I have tried, but these appear to no longer work. How does this now work?

2

Hi !!
I had just the same need as you, and the solution is:

{{ state_attr(trigger.entity_id, 'friendly_name') }}

You need to remove quotes around the Trigger

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