NRFSniffer python tools does not recognize NRF51422 dongle. No capture possible.

RE: NRFSniffer python tools does not recognize NRF51422 dongle. No capture possible.

Marte Myrvold — Tue, 01 Feb 2022 11:37:34 GMT

Hi Vincent,

Great to hear that you are able to run the sniffer now. I am happy to help.

Good luck with the lab, and I hope the students will find looking at the sniffer logs to be both interesting and educational!

Best regards,

Marte

RE: NRFSniffer python tools does not recognize NRF51422 dongle. No capture possible.

v.planat — Tue, 01 Feb 2022 10:51:30 GMT

Thanks a lot for your answer.

This helped us a lot. In particular the nrf_sniffer command below which helped us qualifying that the dongles were working correctly.

Once we saw that the FIFO file was containing a pcap format that we could opened with Wireskark we understood that the pb was on wireshark

In fact, the test PC that we used was configured by the IT department to prevent any cmd.exe to be executed ... Certainly for security reasons (we could run the nrf_sniffer.py from a powershell)

We tested the wireshark on other PC without this restriction and we were able to see the Nrf interface in wireshark !!

Thanks a lot for your help & support

Regards

Vincent

RE: NRFSniffer python tools does not recognize NRF51422 dongle. No capture possible.

Marte Myrvold — Mon, 31 Jan 2022 12:10:40 GMT

Hi Vincent Planat,

[quote user=""]An interface must be provided or the selection must be displayed[/quote]

You must add the interface as an argument with --extcap-interface. This is the interface you get from --extcap-interfaces, which in the output above is COM5-None. In addition to this, you need to add the --fifo option. So the command should be:

nrf_sniffer_ble.py --extcap-interface COM5-None --capture --fifo FIFO

This will dump the data in the file FIFO. You can read more about using the extcap interface in the Wireshark documentation, such as the chapter 8.2.1. Extcap command line interface.

[quote user=""]In Wireshark the Nrf is not recognized[/quote]

Have you tried refreshing the interfaces in Wireshark? You can do so by selecting Capture > Refresh Interfaces. It should show up under the Capture tab on the welcome page like this:

Best regards,

Marte