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  • Case ID: 289463
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hi, i am getting this error "Failed to write: Timeout while waiting for device EDD22E0E4294 to be attached and enumerated", when i flash the nrf52840 dongle using programmer app given in nordic sdk connect app.

user116376

this error shows after the 100% completion of memory flash as shown in the screenshot below. after showing the error , nrf52840 pulsing led turns off automatically.

Note: i am using segger embedded studio as the ide and uploaded zephyr.hex file in the programmer application of network coordinator demo code given in the samples folder of sdk.

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  • +1

    Hi,

    Have you checked if the program runs as expected on the dongle after this?

    This error does not mean that the dongle was not programmed successfully. After the upload is finished, the dongle will reset. When this happens, the Programmer app will no longer be able to find the dongle, since it is no longer in bootloader mode, and will therefore give an error that it could not enumerate the device. In other words, you can ignore this error. The firmware has been uploaded successfully, which can be seen from the "all dfu images have been written to the target device" log message, and if you make the dongle enter bootloader mode again later, the Programmer will be able to find it again.

    Best regards,

    Marte

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  • +1

    Hi,

    Have you checked if the program runs as expected on the dongle after this?

    This error does not mean that the dongle was not programmed successfully. After the upload is finished, the dongle will reset. When this happens, the Programmer app will no longer be able to find the dongle, since it is no longer in bootloader mode, and will therefore give an error that it could not enumerate the device. In other words, you can ignore this error. The firmware has been uploaded successfully, which can be seen from the "all dfu images have been written to the target device" log message, and if you make the dongle enter bootloader mode again later, the Programmer will be able to find it again.

    Best regards,

    Marte

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