Can't flash firmware on nrf52840 dongle, the error is "Unsupported device. The detected device could not be recognized as neither JLink device nor Nordic USB device. "

[renkai-zeku]

Hi,

I had used nRF Connect Programmer to flash nRF Sniffer firmware on my nRF52840 Dongle, but after that, when I tried to flash the firmware again, I found that there was always an error, "Unsupported device. The detected device could not be recognized as neither JLink device nor Nordic USB device" when I tried to connect with my dongle via nRF Connect Programmer. 

nRF connect is v3.6.1

programmer, v1.4.8

Jlink, v6.96

# nRFConnect System Report - 2021-03-01T06-21-53.952Z

- System: HP HP EliteBook 840 G6
- BIOS: HP HPQOEM - 0
- CPU: 1 x Intel Core i7-8565U 1.80 GHz 8 cores (4 physical)
- Memory: 8.9 GB free of 15.8 GB total
- Filesystem: C: (NTFS) 110 GB 56.8% used

- OS: Microsoft Windows 10 Pro (10.0.18362) win32 ia32

- Versions
- kernel: 10.0.18362
- git: 2.27.0.windows.1
- node: 12.13.0
- python: 3.8.4
- python3:

- Connected devices:
- COM12: 1BAF6BEF05F5DC01

[Simonr]

This is after you have flashed the nRF Sniffer firmware onto the Dongle, correct? This will only be found as a supported device by Wireshark, and in order to be recognized by nRFConnect you will need to enter the "standard" bootloader by pressing the reset button on the Dongle (the one mounted sideways). You can check out the Dongle Programming tutorial here on DevZone for details.

Best regards,

Simon

[renkai-zeku]

Thanks, Simon, it works. 

One question I'd like to double-check. For nRF52840 Dongle, it has bootloader. On nRF Connect Programmer, if I perform “Erase all”, does it erase bootloader of the dongle?