Difference in seconds between input_datetime and now()

Configuration
1

Hi
in my template I want to compare my input_datetime with now() and I want:
TRUE → if input_datetime - now() < 60 seconds.

This not works

{{ now() - (states.input_datetime.volume_night_alexas.state)}}

input
input1621×183 38.6 KB

Could you help me?
Thanks

1 Like
2
  • now() reports the current date and time as a datetime object.
  • Your input_datetime entity reports time as a string.

You can’t subtract a string from a datetime object.

You have to ensure both are datetime objects or integers representing their respective Unix timestamps.

Try this version which converts the input_datetime’s value to a datetime object.

{{ now() - now().replace(hour=state_attr('input_datetime.volume_night_alexas', 'hour'), minute=state_attr('input_datetime.volume_night_alexas', 'minute')) < timedelta(seconds=60) }}
1 Like
3

I convert to timestamps so I can deal with the math in integers and not mess with timedelta objects and all the additional backend math required to process it

{%- set ts_event = as_timestamp(states.[[entity]].state) %}
{%- set ts_now = as_timestamp(now())|round(0) %}
{%- set ts_delta = (ts_now - ts_event) %}

I usually use this to deal with events in the past, so past times get positive deltas, and future times are negative, they can be reversed

4

In the example you posted, the first line will produce None because, in this case, the input_datetime’s value is merely a time string (see screenshot in first post: 23:00:00). That will cause the third line to fail.

unsupported operand type(s) for -: ‘int’ and ‘NoneType’

5

Correct, I am using datetime with a full date, which is needed to get a true UNIX timestamp

In this case, if Now is 24 hours and 10s away from the datetime… will it report only 10s?

6

My mistake; I assumed you were providing Reinqusito a functional solution.