Unable to capture BLE packets using nrf52840 dongle in Wireshark

RE: Unable to capture BLE packets using nrf52840 dongle in Wireshark

JONATHAN LL — Thu, 03 Jun 2021 10:15:57 GMT

Thanks for updating, glad you figured it out.
Regards,
Jonathan

RE: Unable to capture BLE packets using nrf52840 dongle in Wireshark

Thomas — Thu, 03 Jun 2021 08:52:42 GMT

I have solved the problem by upgrading wireshark to the latest version.

Now it is working with nrf_sniffer_for_bluetooth_le_3.1.0_7cc811f and wireshark 3.4.2.

Thanks for your time, you can close the topic.

Regards,

Thomas

RE: Unable to capture BLE packets using nrf52840 dongle in Wireshark

JONATHAN LL — Thu, 03 Jun 2021 08:13:35 GMT

Can you provide a screenshot of Wireshark app. and a basic question to get it out of the way, are you sending any BLE packets ?

Regards,
Jonathan

RE: Unable to capture BLE packets using nrf52840 dongle in Wireshark

Thomas — Wed, 02 Jun 2021 16:12:36 GMT

I have also tried to run the python script in command line (both as root and simple user):

$ python nrf_sniffer_ble.py --capture  --extcap-interface /dev/ttyACM0 --fifo /tmp/wireshark_extcap_-dev-ttyACM0_20210602174315_hpRj0k --extcap-control-out /tmp/wireshark_control_ext_to_ws_-dev-ttyACM0_20210602174315_XPBNJb --extcap-control-in /tmp/wireshark_control_ws_to_ext_-dev-ttyACM0_20210602174315_JUy3mL

I could not see any log output and the file generated in /tmp empty.

RE: Unable to capture BLE packets using nrf52840 dongle in Wireshark

Thomas — Wed, 02 Jun 2021 15:45:57 GMT

Hello Johathan,

Thanks for your reply.

Unfortunately it did not solve the problem. What I have done is add my $USER to dialout group:

$ groups $USER
thomas : **** dialout sudo **** **** wireshark
$ ls -l /dev/ttyACM0
crw-rw-rw- 1 root dialout 166, 0 juin   2 17:22 /dev/ttyACM0

This way, my $USER running wireshark has access to dialout group which correspond with /dev/ttyACM0.

I notice when that the nRF52840 LED on the dongle starts blinking when wireshark is launched, is it a normal behaviour?

Also on the wireshark interface it says at the bottom left: "nRF Sniffer for Bluetooth LE:/dev/ttyACM0: <live capture in progress>" and in the bottom "No Packets".

Regards,

Thomas

RE: Unable to capture BLE packets using nrf52840 dongle in Wireshark

JONATHAN LL — Wed, 02 Jun 2021 14:31:34 GMT

Hi,

This might be the issue:
Ubuntu dont have seriell accessible by default, permissions - Could not open port /dev/ttyACM0 Error after every restart - Ask Ubuntu.

Regards,
Jonathan