Detect previous last_changed value?

[magic prism]

When my tv turn on I need to check if it was off to at least 15s due to the fact that the integration is not super stable and sometime the sensor randomly switch on => off => on, re-triggering some automations, which is quite annoying.

The template condition {{ as_timestamp(now()) - as_timestamp(states.media_player.smart_tv_salotto.last_changed) >= 15 }} won't work as the automation is triggered when the tv switched from off to on, so it always return false.
Is there a way to check the previous last_changed value?

[umbral notch]

you could template a binary sensor in the configuration file which follows the on/off entity state but has delay_off setting which means it wont switch to "off" until a set time has passed. then you can automate off of that entity instead.

documentation on this here - https://www.home-assistant.io/integrations/template/#binary_sensor

[magic prism]

This is quite an elegant solution, worked flawlessly.
Thank you!

[umbral notch]

awesome, happy automating 🙂

[magic prism]

I'm facing a similar problem with a non boolean entity, and I don't understand how to write the template condition.
I want the binary_sensor to be true if the camera return state streaming, else false, but it always return false: can you give it a look?

- platform: template
  sensors:
    tizen_led_delayed_state:
      friendly_name: first_led_hardware_instance_delayed_state
      value_template: >
        "{{ states('camera.first_led_hardware_instance') == 'streaming' }}"
      delay_off:
        minutes: 2

[umbral notch]

can you show me the other one you mind that does work?, its been a minute since i have actually played with this stuff

[magic prism]

- platform: template
  sensors:
    smart_tv_salotto_delayed_state:
      friendly_name: smart_tv_salotto_delayed_state
      value_template: "{{ states('media_player.smart_tv_salotto') }}"
      delay_off:
        seconds: 15

[umbral notch]

try this

  sensors:
    tizen_led_delayed_state:
      friendly_name: first_led_hardware_instance_delayed_state
      value_template: >-
        {{ states('camera.first_led_hardware_instance') == 'streaming' }}
      delay_off:
        minutes: 2```

i think it might just be a formatting issue. i remember that being a bit strange sometimes

[magic prism]

Yep, that seems to be the case, it's working in the template editor.
Thanks a lot!

[umbral notch]

no worries, as you play with this stuff you learn about the little random things that cause issues.
you had the right idea, just needed tiny adjustment