sniffer missing packets

RE: sniffer missing packets

Vala — Fri, 17 Mar 2017 23:09:19 GMT

Thanks run_ar!

RE: sniffer missing packets

run_ar — Thu, 09 Mar 2017 08:57:35 GMT

See the trouble shooting section of this blog post. Go to Downgrade all your nRF5x boards to segger jlink firmware version 5.10n For instructions how to downgrade the board.

RE: sniffer missing packets

Vala — Fri, 03 Mar 2017 16:42:56 GMT

Sure. I added the PCAP file. I am not sure how I can get the Segger jlink firmware version. Could you guide me through that? Can I do it by jlink commander? It gives me the following information when I connect to the dongle that is used as sniffer: Firmware: J-Link OB-SAM3U128-V2-NordicSemi

RE: sniffer missing packets

run_ar — Fri, 03 Mar 2017 16:00:09 GMT

Which segger firmware are you using? For the sniffer you should downgrade to segger jlink firmware version 5.10n. ref: the troubleshooting part of this blog. The firmware can be found in the blog post.

RE: sniffer missing packets

run_ar — Fri, 03 Mar 2017 15:42:24 GMT

Would you mind uploading the pcap file as well? It could be interesting to see this for debugging purposes. Also, which SDK version are you using? and what is the peer device in this case? Thanks

RE: sniffer missing packets

Vala — Fri, 03 Mar 2017 15:25:25 GMT

Thanks run_ar. I added an image as you suggested.

RE: sniffer missing packets

run_ar — Fri, 03 Mar 2017 09:42:20 GMT

I would say that yes, it's normal that you miss some packets using this sniffer. Remember that a commerzial sniffer use very expensive broadband radios, so you cannot really compare the performance betweent them and the nrf sniffer which is a very cheap development tool.

You can see if there are missing packets by looking at the connection event counter in the sniffer. Note that it would be easier to comment on this if you upload an example trace to your question.