nRF Sniffer unable to follow device on PCA10040

Hi all.

As per subject, I'm unable to follow device using PCA10040.

Everything was set according the latest documentation available (infocenter.nordicsemi.com/.../nRF_Sniffer_BLE_UG_v4.1.0.pdf ).

Wireshark is able to sniff the traffic but when I select an adertising device (from the drop down list of the discovered ones) in order to follow it, nothing changes (by docs, I'd expect only involved traffic should be followed and displayed).

INFO: Log started at Mon Jan 24 09:18:18 2022
INFO: Extcap version 3.6
INFO: Opening serial port COM3
INFO: closing UART
INFO: Opening serial port COM3
INFO: args: ()
INFO: kwargs: {'callbacks': [('*', <bound method Notifier.passOnNotification of <Sniffer(Thread-3, initial)>>)]}
INFO: board ID: 3
INFO: Sniffer created
INFO: Software version: 4.1.0
INFO: sniffer started
INFO: starting scan
INFO: Scan flags: 0b11
INFO: Sent TK to sniffer: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
INFO: scanning started
INFO: defaults written
INFO: control loop
INFO: gap in packets, between 760 and 937 packet before: [56, 0, 3, 248, 2, 2, 10, 1, 37, 60, 0, 0, 156, 75, 9, 1, 214, 190, 137, 142, 0, 37, 187, 1, 36, 72, 234, 140, 2, 1, 26, 27, 255, 117, 0, 66, 4, 1, 1, 103, 140, 234, 72, 36, 1, 187, 142, 234, 72, 36, 1, 186, 1, 112, 0, 0, 0, 0, 0, 171, 226, 127] packet after: [0, 0, 3, 169, 3, 14]
INFO: Firmware timestamp 21265107 reference: Jan 24 2022 09:18:19.671929 W. Europe Standard Time
INFO: follow_device: [b'140', b' 234', b' 72', b' 36', b' 1', b' 187', b' 0']
INFO: Sniffing device 0 - """"
INFO: Follow flags: 0b0
INFO: Following 8c:ea:48:24:01:bb  public 
INFO: follow_device: [b'7', b' 118', b' 134', b' 116', b' 7', b' 237', b' 1']
INFO: Sniffing device 1 - """"
INFO: Follow flags: 0b0
INFO: Following 07:76:86:74:07:ed  random 

As you can see from log abobe, commands to follow the target device are sent to the PCA10040 board but nothing changes.

PCA10040 board is plugged into PC (Win 10) USB port, from which it also get power, and I get a virtual serial port on COM3.

Today I discovered these two snippets by the nRF Sniffer docs.:

Table 1 at page 6 of said pdf doc reports a firm NO at the crossing of nRF52 DK column with the USB raw. What does this mean? What is the intended PC cabling needed to use of PCA10040 board as a sniffer? Of course first note at page 13 of same doc does not apply to PCA10040.

Please let me know how to proceed in order to solve this issue.

Thank you all in advance and best regards,

P.

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