#"Something went wrong" or "Unable to add the device to Home Assistant (error code 1)"

1 messages · Page 1 of 1 (latest)

peak badger
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When trying to add a door/window sensor to Home Assistant with Matter over Thread I get:
-Adding device, generating encryption key, testing connection to Thread network, WORK.
-Then when attempting to add the device to Home Assistant I get either: "Something went wrong" or "Unable to add the device to Home Assistant (error code 1). Would you like to try again?"
Any assistance would be appreciated. I'm looking for instructions on how to 'manually' add a Matter/Thread device using JSON requests.

I have many other Matter over Thread devices (all mains power, none battery if that matters) all working well

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This is using Home Assistant, OpenThread Border Router, Matter Server

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I have Unifi wifi, I have seen people mention this is a problem, but not sure this affects things given it is Matter over** Thread** not wifi

peak badger
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LLM output:

Based on the logs, your Matter server is failing to commission the battery door/window sensor due to device attestation failure. Here's the analysis and solution:

Root Cause Analysis
The key error occurs during the device attestation phase:

CHIP_ERROR [chip.native.-] Unable to find PAA, err: src/credentials/attestation_verifier/FileAttestationTrustStore.cpp:177: CHIP Error 0x0000004A: CA certificate not found, PAI's AKID: [HEX HERE - NOT SURE IF SENSITIVE TO REVEAL]
This indicates:

Missing Product Attestation Authority (PAA) certificate
The device's Product Attestation Intermediate (PAI) certificate chain cannot be verified
Commissioning fails at the Attestation Verification step

radiant apex
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is that a test device? enabling this option for Matter Server Add-on would ignore some certification issues

Screenshot_2025-12-23_at_23.59.14.png
peak badger
radiant apex
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I don’t think it’s even allowed to sell uncertified Matter devicesmindblown