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" dfu.zip
nrfutil dfu usb-serial -pkg dfu.zip -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...