Templating a sensor from a switch - no luck so far

[M-Punkt (Michael Rösgen)]

Hi all,

could do with some help in creating a sensor from a switch attribute.

setup:

• Fritz!DECT 210 socket connected to a Fritzbox 7490
• Fritzbox 7490 integration in HA configured + running
• lovelace entity card shows the correct value for attribute Current Power W

Up to this point everything works as designed

Now I would like to access the “Current Power W” attribute via a sensor object.
To achieve this, I built a template sensor:

template:
  sensor:
    - name: fritz_dect_210_1_watt
      unique_id: fritz_dect_210_1_watt
      state: "{{ state_attr('switch.fritz.dect_210_1', 'current_power_w') | float }}"
      icon: mdi:chart-bell-curve
      unit_of_measurement: "W"

This sensor will stubbornly report 0W, regardless of the real value of the attribute.

Where did I go wrong?

Any help is very appreciated.
Thank you

Michael

[tom_l]

What does this return in the Developer Tools Template Editor,

{{ state_attr('switch.fritz.dect_210_1', 'current_power_w') }}

[M-Punkt (Michael Rösgen)]

Thanks for the pointer - I haven’t used this yet.

Template Editor returns an error message:

“Dieses Template überwacht keine Ereignisse und wird nicht automatisch aktualisiert”
basically translates to
“This template does not monitor any events + will not be updated automatically”

Unfortunately, I’m none the wiser yet…

[tom_l]

Can you take a screenshot of the switch entity and the attribute column in Developer Tools States?

[M-Punkt (Michael Rösgen)]

This one?

[tom_l]

Yep. That one.

The template editor should return 0 according to that, when you enter this:

{{ state_attr('switch.fritz.dect_210_1', 'current_power_w') }}

[ardysusilo (Ardy)]

Hello, can you try this?

template:
  - sensor:
      - name: "fritz_dect_210_1_watt"
        unique_id: fritz_dect_210_1_watt
        state: "{{ state_attr('switch.fritz_dect_210_1', 'current_power_w') | float }}"
        icon: mdi:chart-bell-curve
        unit_of_measurement: "W"

I think you misspelled switch.fritz_dect_210_1 by writing switch.fritz.dect_210_1.

[tom_l]

And I copied it.

Well spotted.

[M-Punkt (Michael Rösgen)]

OMG!

Thanks @ardysusilo for spotting this f…<<<ine typo.
Honestly, I rerererechecked that and didn’t see it.

Now it works like a charm.

Again, thank you (and @tom_l as well) for saving my soul.
Michael