core On a Helper Sensor: Entities no longer have a state class

The problem

Splitted issue from #127363 on request

After upgrading to 2024.10.1 I get "Entities no longer have a state class" messages. To be precise I've 8 of those messages and those 8 sensors are made by hand as helpers.

The messages

The helpers

Four sensors get their data pushed from a small python script on a raspberry pi's. The other four from two pi zero's with a little script.

What I observed is that after a reboot, before a RPi pushed a new value, there are no errors. After a push the error apears.

If I open the settings of such a sensor I see a State class "meting" (Measure in dutch). Resending/updating doesn't make any difference.

What version of Home Assistant Core has the issue?

2024.10.1

What was the last working version of Home Assistant Core?

2024.9.3

What type of installation are you running?

Home Assistant OS

Integration causing the issue

Helper template sensors

Link to integration documentation on our website

https://www.home-assistant.io/integrations/template/

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response

Oct 05 '24 19:10 M4RCCR4FT

Hey there @phracturedblue, @tetienne, @home-assistant/core, mind taking a look at this issue as it has been labeled with an integration (template) you are listed as a code owner for? Thanks!

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Oct 05 '24 19:10 home-assistant[bot]

How does your device push new state?

Oct 05 '24 19:10 joostlek

headers  = {"Authorization": f"Bearer {bearertoken}", "content-type": "application/json"}
url      = f"http://{ip}:{port}/api/states/{tempsensor}"
data     = {"state": dhttemp, "attributes": {"unit_of_measurement": "C", "icon": "mdi:thermometer"}}
response = post(url, headers=headers, json=data)

url      = f"http://{ip}:{port}/api/states/{vochtsensor}"
data     = {"state": dhtvocht, "attributes":
{"unit_of_measurement": "%", "icon": "mdi:water-percent"}}
response = post(url, headers=headers, json=data)

Oct 05 '24 19:10 M4RCCR4FT

I think that one of the attributes you have to send is the state class as well, can you maybe give that a shot to add as well?

Oct 05 '24 19:10 joostlek

I have this same issue as of 2024.10.1 (I had skipped 2024.10). The error is reported on a sensor group that I created through the Helper UI earlier this year. It consists of a set of battery level sensors.

I have not tried to delete it although it appears I could delete it (assuming 127363 doesn't interfere) and recreate it with YAML and explicitly specify a state class but as this is being tracked as an issue I'm inclined to watch this thread to see what its resolution will be.

Oct 05 '24 20:10 NateEaton

That sounds like the bug with the group integration, I think there is an issue open for that one as well which is more interesting to follow

Oct 05 '24 20:10 joostlek

I think that one of the attributes you have to send is the state class as well, can you maybe give that a shot to add as well?

Thank you for your swift respons! Could you give me another pointer on how to do that, as I implemented the exact example in the API Docs here https://developers.home-assistant.io/docs/api/rest/ (See post api/states)

Oct 06 '24 07:10 M4RCCR4FT

I have no clue how the rest API works. But my current suspicion is that the measurement you post makes the state class dissapear

Oct 06 '24 07:10 joostlek

The data needs to include the state class also as you have created template sensors with a state_class but since you're updating it's state from "outside" you also need to include that in the data you send in. data = {"state": dhttemp, "attributes": {"unit_of_measurement": "C", "icon": "mdi:thermometer", "device_class": "temperature", "state_class": "measurement"}}

I think we should close this issue as it's not an issue with the repairs (as they are actually correct).

Oct 15 '24 20:10 gjohansson-ST

Thank you, it's indeed working with that change! I agree to close this ticket.

Oct 16 '24 10:10 M4RCCR4FT

(maybe the API documentation should be updated...)

Oct 16 '24 10:10 M4RCCR4FT