Automation half an hour before alarm

Configuration
1

I want my automation to start half an hour before my alarm. I have googled and tried different suggestions that were given in the forum, but have not been able to get my automation to trigger. Right now I am using this template trigger:

trigger:

  • platform: template
    value_template: >
    {{ states(‘sensor.time’) == (as_timestamp(states(‘input_datetime.alarm’)) - 1800) | timestamp_custom(‘%H:%M’, False) }}

Any suggestions on how to improve?

2

https://community.home-assistant.io/t/how-to-help-us-help-you-or-how-to-ask-a-good-question/114371#oneone-format-it-properly-16

Does your input_datetime contain just a time or a date and time?

Time only:

{{ now() > today_at(states('input_datetime.alarm')) - timedelta(minutes = 30) }}

Time and Date:

{{ now() > state_attr('input_datetime.alarm','timestamp')|as_datetime|as_local - timedelta(minutes = 30) }}
3

It only has time. I have updated the YAML to this, but it still does not work:

trigger:

  • platform: template
    value_template: >
    {{ now() > today_at(states(‘input_datetime.alarm’)) - timedelta(minutes = 30) }}
4

Usually it doesn’t require repeating, but (again), please follow the guidelines for posting code.

1 Like
5

You need to format your code, as we can’t see, if it is correct…

Please take a look at the link Tom already posted, or read up on that here:

We can’t help you, if you don’t do that, sorry! :slight_smile:

Please, take the time and read these posts. The second thing: if it doesn’t work, provide us with more information. In short: you’re making it really hard to help you. :slight_smile:

Thanks for your understanding!

EDIT: @CO_4X4 beat me to it… :laughing: :laughing:

1 Like
6 
trigger:
  - platform: template
    value_template: >
    {{ now() > today_at(states('input_datetime.alarm')) - timedelta(minutes = 30) }}

Do you see any errors in the code?

7

Try your code in the developer tools, there you get an error message, that will help you further.

In your case, it’s the incorrect format of “states(…”, as this is a string of the state, and not the corresponding (datetime) object. You would compare a string against a datetime object…

There are a few ways, I’d do it like this:

{{ now() > (state_attr('input_datetime.alarm', 'timestamp') | as_datetime - timedelta(minutes=30)) }}
8

I tried it with your line, still nothing. In the developer tools, it only says:

This template updates at the start of each minute.

This template listens for the following state changed events:

Entity: input_datetime.alarm

9

This is the code from @paddy0174 when used against one of my existing date/time helpers:

image
image1141×218 29.8 KB

It works.

11

That’s the same as what I see, but the automation does not trigger.

12

If your code is PRECISELY as you pasted it, then the indent is wrong (and should have prevented you from saving it I think):

trigger:
  - platform: template
    value_template: >-
      {{ now() > today_at(states('input_datetime.alarm')) - timedelta(minutes = 30) }}

or

trigger:
  - platform: template
    value_template: "{{ now() > today_at(states('input_datetime.alarm')) - timedelta(minutes = 30) }}"
13

Please post the complete automation and how you set it up. The template is working, so it must be something else. :slight_smile: