BLE Sniffer Firmware on NRF52840DK

[jbrent87]

My NRF52840DK does not seem to be working correctly after programming the nrf sniffer firmware.

I am using the instructions for setting up the sniffer provided here: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_sniffer_ble%2FUG%2Fsniffer_ble%2Fintro.html

I downloaded the sniffer firmware from the following page and have attempted 4.1.1, 4.1.0, and 4.0.0 with the same outcome: https://www.nordicsemi.com/Products/Development-tools/nrf-sniffer-for-bluetooth-le/download#infotabs

Screenshot of nrf connect programmer used for flashing the dev kit for reference:

After programming the firmware I see the jlink connection continuously cycle. I have tried this with two different dev boards and see the same result. I also occasionally see the jlink run in bootloader mode as shown below.

Within wireshark I see the nrf com port intermittently available under interfaces, but am unable to establish a connection and successfully sniff packets. Either the port will disappear or attempting to connect will fail. 

Any help with troubleshooting this issue would be appreciated!

[drselim]

Hi, I remember a similar ticket about this issue:

 RE: In wireshark I'm not able to see the interface of Nrf52840DK 

In that discussion, this was mentioned:

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Hello,

Yes there is known issue with nRF52840DK rev3.0.0 and nRF sniffer firmware, the issue seems to be in  UART connection. So as a workaround try to connect your other USB port (nRF USB) in DK to the PC. Now flash the nRF sniffer firmware via the programmer app (Erase and write). Please let me know the update.

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Maybe that discussion may help you.

[Marte Myrvold]

Hi,

Can you try reprogramming the interface MCU? You can download the firmware from https://www.nordicsemi.com/Products/Development-hardware/nRF52840-DK/Download under "Interface MCU Firmware". Make sure to download the J-LINK version.

To put the interface MCU into bootloader mode, press and hold the reset button while turning on the DK until LED5 blinks. The device should show up as a directory named BOOTLOADER in your filesystem:

Drag and drop the interface MCU firmware you downloaded earlier into BOOTLOADER. The device should disconnect automatically when it is done. Power cycle the device, and it should be back to normal again.

Best regards,
Marte