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nRF52840 SoftDevice problem

Hello, I am trying to load some example on my nRF52840 dongle. I am developing without using a board but only the dongle, SEGGER and nRF Connect 3.6.0 .

Following this guide https://devzone.nordicsemi.com/nordic/short-range-guides/b/getting-started/posts/nrf52840-dongle-programming-tutorial , I am loading the blinky hex file example from ble_peripheral/ble_app_blinky/pca10059 on the dongle. But when I try to write it, Programmer asks me for the SoftDevice ID version for the firmware on the dongle.

In the list are present only two version for this dongle ( 0xA9 and 0xAE) and with both I get the error:

DFU failed: Error message for known extended error code from DFU target: The array of supported SoftDevices for the update does not contain the FWID of the current SoftDevice.

I also tried with custom versions taken from here https://github.com/NordicSemiconductor/pc-nrfutil/blob/master/nordicsemi/__main__.py#L501 , but every version for my dongle seems to be incorrect.

How should I proceed in order to load the example correctly on the dongle? 

Thanks everyone in advance for the help

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