KL720 Dongle Error = -7 (USB: Operation timed out)

shao-xuan linshao-xuan lin
in KL720 related discussion

I built the get start example in the Windows 10 environment according to the document center, but it happened

error = 103 (Device waits inference results timeout) or error = -7 (USB: Operation timed out) occurred

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Below is the scanned information:

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Where could this be wrong?

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Comments

  • Otis HsiehOtis Hsieh

    Hi shao-xuan lin,

    Is there any part you changed, including model, image, or code?

    And can you provide your plus version?

    Thanks.

  • shao-xuan linshao-xuan lin
    edited January 2022

    Otis Hsieh

    I did not change any code

    plus version = 1.2.1

    Because my dongle firmware is already KDP2, and there is no KL720 firmware in Kneron_DFUT_v1.2.1, so I did not perform that step

    Thanks.

  • Otis HsiehOtis Hsieh
    edited January 2022

    Hi shao-xuan lin,

    It seems that you need to update firmware again because your plus version is 1.2.1.

    Firmware can be found in ${PLUS_FOLDER}/res/firmware/KL720/, not in DFUT files.

    You can use DFUT to update firmware and retry it.

    Thanks.

  • shao-xuan linshao-xuan lin

    Otis Hsieh

    Thank you very much for successfully solving the problem

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