Help writing automation for brightness trigger

Configuration
, ,
1

I’m new to Homeassistant and am not comfortable yet with how templates, triggers, and conditions all fit together. Here is what I want to do in pseudocode:

  • Trigger on change of brightness level of light.art

  • If brightness level of light.art is > 40 take action light.lamp.turn_on

  • Else if brightness level of light.art <= 40 take action light.lamp.turn_off

How would I write this for a Homeassistant automation?

2

Hi. I found help in this video:

Tell us if you still need help after this video

3

Thanks, I rewatched it to make sure I didn’t miss something. I am still not sure how to get a brightness level to trigger the automation. Here is the most recent automation.yaml section that I have tried:

  • action:
    • data:
      entity_id: switch.n_dining_lamp_switch
      service: light.turn_on
    • data:
      entity_id: switch.s_dining_lamp_switch
      service: light.turn_on
      alias: Painting Lamps on
      condition: []
      id: ‘1514940240049’
      trigger:
    • above: ‘126’
      entity_id: light.painting_light_level
      platform: numeric_state
      value_template: ‘{ “brightness” }’

This compiles fine but never triggers. I suspect that there is nothing to cause a “query” to the z-wave control (light.painting_light_level), so it never sees a value to act on. In my previous ISY994iz controller I had to set up a polling loop to read and save the current brightness to act on.

Will this automation do it’s own polling/query of the control or do I need to first create some sort of sensor to do that and then trigger off of the sensor?

Thanks in advance for any help.

4

You can test your value template on the front end, under dev tools, on the “templates” tab.

I think it actually needs to be value_template: ‘{{ state.attributes.brightness }}’

When testing the template, you’ll have to specify the entity_id, so on the templating page you’ll have to try {{ state.light.painting_light_level.attributes.brightness }}

1 Like