Wireshark nrf sniffer

[Ridhi]

1). want to know what is the sacn interval/window value used in wireshark

2). how many max. number of advertising devices wireshark nrf sniffer displays

3). instead of showing all advertising devices on nrf sniffer wireshark i only want to select 3 advertisers with their mac addresses to show their advertising data...how can select them

[Hung Bui]

Hi Nancy, 

1) I don't have the exact value used on the firmware of the sniffer but the sniffer always scan (RX mode) so the duty cycle is 100%. Maybe there isn't really a scan window on the sniffer, it simply just scan. 

2) There isn't a limit on this. The sniffer simply scan for any advertising packet it can receive. Note that there is only one antenna on the sniffer so it can only scan one channel at a time and receive one packet at a time. 

3) You can configure the sniffer to follow only one advertising device by using the device drop down menu. It's not possible to configure the sniffer to follow 3 devices. However, you can setup your own filter in Wireshark to only allow the MAC address of these device. For example something like this: 

((btle.advertising_address == 63:77:62:e9:ff:b3)) || (btle.advertising_address == 3c:25:7e:84:b5:1d)

But note that it's only software filter on wireshark, not the filter on the sniffer itself. The sniffer will still scan for all devices.