Jinja (Templating) help needed

Configuration
1

Hello all

I need some help with Templating. Tried a few things but not getting anywhere.

Basically, I have an entity called somebody, that is my family. If somebody is away, I want to find out the difference between time - now and time somebody left home.

{{ (now()) - (states.binary_sensor.somebody.last_changed) }}

if the time is greater than 1 hour, then I want to perform some action.

Ca somebody help me please.

Thank you

2

Do the math in seconds, and check the state.

{{ is_state('tracker.somebody', 'not_home') and ( now()|as_timestamp - as_timestamp(states.binary_sensor.somebody.last_changed) > 3600 ) }}
3

Side-note: Both now() and an entity’s last_changed produce datetime objects. That means both have built-in timestamp() methods. We can leverage that to shrink the template a little bit:

{{ is_state('tracker.somebody', 'not_home') and
  (now().timestamp() - states.binary_sensor.somebody.last_changed.timestamp() > 3600 ) }}
1 Like
4

Ugh. I was messing with that earlier today and could not get it to work because I was using now().timestamp i.e. without the (). Thank you, it makes sense now.

5

Hi

Excellent, Thank you for your quick replies.

6

Sorry, just one more thing. Would you compare value like this?

{{ is_state('binary_sensor.somebody', 'off') and
  (now().timestamp() - states.binary_sensor.somebody.last_changed.timestamp() > 3600 ), 'True' }}

I want to arm the alarm automatically if no one is home for more than 1 hour. Above will be my trigger, and in action I will arm the alarm.

7

No. That is not a valid template. The template I posted and 123’s improved version will both resolve to true or false.