History_stats configuration unexpected value

Configuration
1

I have setup a history_stats sensor but the value its returning is making me think I may not understand the documentation on this correctly.

I setup my history_stat sensor based on the starts today at 6, lasts 5 hours.

sensor:
  - platform: history_stats
    name: Foo
    entity_id: binary_sensor.bar
    state: "on"
    start: "{{ now().replace(hour=17, minute=0, second=0) }}"
    duration:
      hours: 12

My understanding that this would apply starting at 5 PM for 12 hours.

I didn’t see any errors in the log and I have the information in the recorder (purge_keep_days is 28)

Where I am confused is that the where as checking the history for binary_sensor.bar I see it was on from 8:58 PM until 5:12 AM but the history_stat (sensor.foo) the value reaches 3.03 hours at 11:59 PM. I am guessing the issue might be related to the day change or maybe I don’t understand the history_stat sensor correctly.

Thanks!

2

Yes. What you have will only measure from 5pm to midnight. As soon as the date changes at midnight it will no longer be collecting data as it is before 17:00 on that day.

Instead of a start and duration you could try this:

    end: "{{ now().replace(hour=5, minute=0, second=0) }}"
    duration:
      hours: 12

So from 5AM back 12 hours. I think that will work.

3

FYI, you can use {{ today_at("05:00") }} for easier reading.

4

if what tom said doesn’t work, you can do this:

sensor:
  - platform: history_stats
    name: Foo
    entity_id: binary_sensor.bar
    state: "on"
    start: >
      {% set start = today_at('17:00') %}
      {% if start > now() %}
        {{ start - timedelta(days=1) }}
      {% else %}
        {{ start }}
      {% endif %}
    duration:
      hours: 12
5

This is doing my head in. :confused:

At and before 5pm the start time is 5PM today. Yet after 5pm the start time is 5pm yesterday. As it only records after 5PM why not just do:

    start: >
      {{ today_at('17:00')  - timedelta(days=1) }}

This will always start at 5pm yesterday.

6

Yah sure, that works too. Just change the 17 to 05

7

But that would be the end time?

I don’t get it. Will have a bit more of a think.

8

yah, brain fart

1 Like
9

Thanks! I will test this out and mark the solution. Really appreciate the explanation