Template tool question

Configuration
1

I am trying to use the template tool in Developer Tools to learn more about using templates.
If I enter:
Office light is on? {{ is_state(‘switch.officelight’, ‘on’) }}

It correctly returns True or False.

If I enter:
{{ light.steve_desk_light }}

I get:
UndefinedError: ‘light’ is undefined

Likewise:
sensor.disk_use_percent = {{sensor.disk_use_percent}}

returns:
UndefinedError: ‘dict object’ has no attribute ‘freezer_temperature_c’

Am I doing something wrong or does the template tool not have scope to my states?

2

You can’t just supply the entity id and expect to get back the state. You need to ask for the state of the entity, like this:

{{ states('light.steve_desk_light') }}

Or ask for an attribute value, like this:

{{ state_attr('light.steve_desk_light', 'brightness') }}

Note that example will only work if the light is on.

3

Thanks. I’ll stumble through more tomorrow…

4

More here https://www.home-assistant.io/docs/configuration/templating/#states