sudo apt install screen
.JLINK
. Make sure you can see this drive.nrf52840-dk.bin
file to the JLINK
drive.--clean
.JLINK
drive show up when you connect your nRF52840 DK you'll have to update the interface firmware.BOOTLOADER
.JLINK
.FAIL.txt
file might appear on the JLINK
drive) you can also flash using nrfjprog
.