nRF Sniffer Capturing all 3 Advertising Channels with 3 seperate Dongles

[Muftx]

Hello,

is there a way to record Advertising Packets on all three channels (37,38,39) simultaneously using 3 individual nRF52840-Dongles and piping the output to a stream. I tried solving this with Tshark but i don't know how to set the Dongles to record only on each channel without using the GUI from the Wireshark Plugin.

Would be nice if someone had an idea on how to solve this obstacle.

Thanks

[Joakim Andersson]

I have never used tshark before, but since you have started it with an output pipe I'm guessing you can figure it out.

You need to set up the input pipe and send the command over that.
The command format is explained here: https://www.wireshark.org/docs/wsdg_html_chunked/ChCaptureExtcap.html
Look at 8.2.3.2.1. Control Protocol.

The control number is 3 (CTRL_ARG_ADVHOP = 3 in nrf_sniffer_ble.py) and the command byte is 2 for "SET" I think, since the type is string. The payload should be the channel map, with comma as separator. So for a single channel it just the string representation of a single channel (utf-8).