Need help creating a sensor after I confirm a template works in dev tools

[sfnetwork]

My Samsung washer and dryer only show completion time and no remaining time.
I found how to get this data and successfully tested in dev tools template:

Now, my stupid problem is that I have no clue how to add this correctly in the sensors.yaml, the syntax…

This was how I tried but isn’t right:

> #Template for washer and dryer
>   - platform: template
>     sensors:
>       remainingtime_laveuse:
>         value_template: {% set ct = states('sensor.laveuse_washer_completion_time') | as_datetime %}
>         {{ '00:00' if now() > ct else (ct - now()).total_seconds() | timestamp_custom('%H:%M', false) }}

Thanks in advance

[rossk]

Wrong formatting at a guess:

template:
  - sensor:
    - name: your sensors name
      state: >
        {% set ct = states('sensor.laveuse_washer_completion_time') | as_datetime %}
        {{ '00:00' if now() > ct else (ct - now()).total_seconds() | timestamp_custom('%H:%M', false) }}

Example can be found here:

Template

EDiT: adding missing colon from “state: >”

[sfnetwork]

Still is not valid when trying to add this in my sensors.yaml…

template:
  - sensor:
    - name: Laveuse temps restant
      state >
        {% set ct = states('sensor.laveuse_washer_completion_time') | as_datetime %}
        {{ '00:00' if now() > ct else (ct - now()).total_seconds() | timestamp_custom('%H:%M', false) }}

[123 (Taras)]

@sfnetwork

trying to add this in my sensors.yaml

You’re adding it to the wrong place.

If you have the following line in configuration.yaml

template: !include templates.yaml

then the suggested example goes in templates.yaml but without including the first line containing template:

If you do not have that line in configuration.yaml, then put the suggested example directly in configuration.yaml.

[sfnetwork]

@rossk

template:
  - sensor:
    - name: your sensors name
      state >
        {% set ct = states('sensor.laveuse_washer_completion_time') | as_datetime %}
        {{ '00:00' if now() > ct else (ct - now()).total_seconds() | timestamp_custom('%H:%M', false) }}

ok tried adding this directly in configuration.yaml (I don’t have the templates.yaml link) but HA showing me this error:

My lines in configuration.yaml:

[123 (Taras)]

The error message says it was expecting to find a colon but it was missing.

You’re missing a colon here:

      state >

Change it to this:

      state: >

[sfnetwork]

Thank you so much for this it works!
Very sorry, I always mess up in yaml syntax when I need to jump back in it after months…