Using number selector to generate numbered entity id

Configuration Blueprints
1

Hi!
I am trying to build an automation blueprint to map functions on LEDs on a self built device. The LEDs have numbered entity IDs in the form of light.led_xx

I now want to generate a template that takes just the number as an input and generates the entity id from that and I can’t figure out, how I would do that.

My input looks like this:

blueprint:
  [...]
  input:
    led:
      name: LED
      description: LED on Statusdisplay
      selector:
        number:
          min: 0
          max: 15
[...]

How do I use that in the template so I get the following:

[...]
      - service: light.turn_on
        target:
          entity_id: {{ light.led_<led> }}
[...]

So… if I select 12 in the blueprint I want the entity id to be light.led_12

2

I would image it would be something like:

  input:
    led:
      name: LED
      description: LED on Statusdisplay
      selector:
        number:
          min: 0
          max: 15

variables:
  led: !input led
  led_light:  "{{ 'light.led_' + led }}"

action:
  - service: light.turn_on
    target:
      entity_id: '{{ led_light }}'

But i’m new to blueprinting as well.
https://www.home-assistant.io/docs/scripts/#variables
https://www.home-assistant.io/integrations/script/#configuration-variables

3

Nope… that also didnt do it unfortunately. I tried several versions I could think of but got the weirdest error messages up to having to restart HA because I couldnt add automations anymore. I gave up and just use an entity selector with filters now…

4

What error’s did you get?
What code editor are you using? (I Recommend “Studio Code Server” integration, it helps finding the errors).
Quote people, or Tag them in your responses, otherwise they don’t know you have replied to them.
I notice another error in that code I submitted, that would cause it not to work, I have edited my OP.
People often use the Logs to test there variable output results like

  input:
    led:
      name: LED
      description: LED on Statusdisplay
      selector:
        number:
          min: 0
          max: 15

variables:
  led: !input led
  led_light:  "{{ 'light.led_' + led }}"

action:
  service: logbook.log
  data:
    name: "{{led}}"
    message: "{{led_light}}"