nRF Sniffer for 802.15.4 based on nRF52840 with Wireshark: What does the blue led signfify?

[Jan_Erik]

I am using the 802.15.4 sniffer to troubleshoot the development of an openthread  application based on the nrf connect sdk. The sniffer has a green led that flashes steadily and a blue led that lights up irregularly. I assume the green led is just to indicate that the sniffer is running. What does the blue led signify?  

Thank you,
Jan Erik

[Simonr]

Hi

What kind of nRF52840 board are you using as an nRF Sniffer for 802.15.4 here? The nRF52840 DK doesn't have any blue LEDs, and the nRF52840 Dongle doesn't have any standard for blinking a blue LED in the Sniffer firmware, and only blinks steadily green on my end. How can we reproduce this blue LED blinking on our end?

Best regards,

Simon

[Jan_Erik]

Hi Simon,

The sniffer is on an nRF52840 dongle. I set it up using these instructions: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_sniffer_802154%2FUG%2Fsniffer_802154%2Fintro_802154.html.

I used the  nRF Connect Programmer to flash the image.  When writing a hex file with the nRF Connect Programmer, I don't get an option to erase the dongle, only to write the hex files. Am I correct in assuming that the programmer fully erases as part of the write process?  I had a devil of a time with the nrf52840dk using west flash until I discovered that I needed to include the --erase flag.

If use of the blue LED isn't included in the sniffer source code (closed source so can't check myself) then I propose re-doing the setup process to see if it is repeatable. I won't have a chance to try it until the end of the week but will report back once I've had a go with it.

Jan Erik