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  • Hello,

    I tried to flash AkosLukacs's hex file from this page to my nrf52840 dongle using nrfutil:

    nrfutil pkg generate --hw-version 52 --sd-req 0 --application espruino_2v04.160_nrf52840_dongle.hex --application-version-string "2.4.0"
    nrfutil dfu usb-serial -pkg -p COM5 -b 115200

    it says that the device was programmed succesfully, but I can't connect to it (I do not see any BT device nor any COM port I can connect. the only port I see is the one I used for programming showing nRF52 SDFU USB (COM5))

    any hint what can be wrong ?

    thank your any advice...

  • I don't think you need to create a DFU package. I just used the nRF Connect application's programmer. AFAIK that just calls nrfjprog.
    I think you should try nRF Connect's gui, or just flash the hex with nrfjprog.

  • @k.zabloudil

    I am at the same step. Flashing bootloader seems fine. I think windows probably needs a driver. Will look a bit more.

    Just occurred to me that the problem is probably that I have never ran an official Espruino device. The driver that would normally install on first run is probably not installing. Will try that.


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