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Frequently Asked Questions and Troubleshooting for Matter over Wi-Fi

Troubleshooting


1. Bluetooth connection fails when trying to commission the system through the ChipTool:


Command leading to error:

$ out/standalone/chip-tool pairing ble-wifi 1122 mySSID myPassword 20202021 3840

Where mySSID is your AP's SSID and mypassword is your AP's password.


Error example:

[1659464425.856025][34818:34823] CHIP:DL: HandlePlatformSpecificBLEEvent 16386

[1659464425.856035][34818:34823] CHIP:IN: Clearing BLE pending packets.

[1659464425.856055][34818:34823] CHIP:IN: BleConnection Error: ../../examples/chip-tool/third_party/connectedhomeip/src/platform/Linux/bluez/Helper.cpp:1775: CHIP Error 0x000000AC: Internal error

This error indicates that the Bluetooth connection between your system and laptop is failing. Follow the given procedure and then retry the ChipTool commissioning command.


Procedure:

  1. Stop Bluetooth service: $ systemctl stop bluetooth.service

  2. Wait 20 seconds

  3. Restart Bluetooth service: $ sudo service bluetooth restart

  4. Unblock Bluetooth service: $ rfkill unblock all

  5. Enable Bluetooth service: $ sudo systemctl enable bluetooth

  6. Issue the pairing command: $ out/standalone/chip-tool pairing ble-wifi 1122 mySSID mypassword 20202021 3840

    Where mySSID is your AP's SSID and mypassword is your AP's password.



2. Unsupported certificate format Error:


When trying to commission the system, if an Unsupported certificate format error (example below) is encountered, follow the procedure stated below.


Error example:

[1659631352.672826][5076:5076] CHIP:TOO: Run command failure: ../../examples/chip-tool/third_party/connectedhomeip/src/controller/CHIPDeviceController.cpp:1275: CHIP Error 0x00000050: Unsupported certificate format

Procedure:

  • Delete the existing certificates on your laptop with the following command run from the /connectedhomeip directory:

    $ /bin/rm/tmp/chip_*

  • Issue the commissioning command


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