Matter TH failing CDOCONC-2.1

RE: Matter TH failing CDOCONC-2.1

Elfving — Fri, 12 Sep 2025 10:32:35 GMT

Got help from the relevant team here:

This steps are defined as the following:

    - label: "Step 4: TH reads from the DUT the MeasuredValue attribute."
      PICS: CDOCONC.S.A0000
      command: "readAttribute"
      attribute: "MeasuredValue"
      response:
          constraints:
              type: single
              minValue: MinMeasuredValueValue
              maxValue: MaxMeasuredValueValue

Looking at the error:

Test Step Error: Error occurred during execution of test case TC-CDOCONC-2.1. '>=' not supported between instances of 'float' and 'NoneType'

This indicates that MeaseuredValue was not set NoneType. Alternatively one of the MinMeasuredValueValue or MaxMeasuredValueValue was of the NoneType. Have you set the MeasuredValue ?

Another thing: By default, this test case expects the Carbon Dioxide Concentration device type to be in Endpoint 1. Maybe this is the problem, as customer has this cluster on endpoint 2 and didn't configure Harness correctly? https://github.com/nrfconnect/sdk-connectedhomeip/blob/v3.0-branch/src/app/tests/suites/certification/Test_TC_CDOCONC_2_1.yaml#L23

https://github.com/project-chip/certification-tool/blob/main/docs/Matter_TH_User_Guide/Matter_TH_User_Guide.adoc#92-test-parameters

Regards,

Elfving

RE: Matter TH failing CDOCONC-2.1

Elfving — Fri, 12 Sep 2025 08:29:04 GMT

Hi again,

Which chip-tool command did you use to obtain value of MaxMeasuredValue? And what is then returned?

Regards,

Elfving

RE: Matter TH failing CDOCONC-2.1

Tiit — Wed, 10 Sep 2025 10:57:37 GMT

Hi Elfving,

It is related in that I'm working on the same device. But the previous issue was resolved as a user posted a snippet of JSON i have to add to the TH conf that makes the tests run on the correct endpoint. I have also discussed this with the lab that will certify the device and they agree that this is how they would also do that.

I will also reach out to CSA and hope they have some input on this issue as well. But I think it wouldn't hurt to have the issue here in Devzone as well since this will be the most likely place the next person running into this will look for the solution.

Still using 3.0.1. But if you think it would change anything I can try the newest version as well.

TIit

RE: Matter TH failing CDOCONC-2.1

Elfving — Wed, 10 Sep 2025 10:52:58 GMT

Hi Tiit,

Is this related to this previous case of yours? Was that problem solved?

I agree that it doesn't look like a Nordic issue but I'll forward this to the relevant team and see if they have any ideas.

Still using 3.0.1?

Regards,

Elfving