Sniffing a connection between bonded devices
Use the nRF Sniffer for Bluetooth to sniff an encrypted connection between bonded devices. If the nRF Sniffer has previously successfully sniffed the pairing procedure, it remembers the LTK needed to decrypt the connection. Otherwise, you must provide the LTK.
Sniffing advertisement packets involving a privacy-enabled Peripheral
Use the nRF Sniffer for Bluetooth LE to see advertisement packets, scan requests, and scan responses to and from a single privacy-enabled device. If the nRF Sniffer has previously successfully sniffed the pairing procedure, it remembers the IRK needed to resolve the identity of the device. Otherwise, you must provide the IRK.
Sniffing advertisement packets involving a Periodic Advertiser
Use the nRF Sniffer for Bluetooth LE to see periodic advertise data from a Periodic Advertiser. If the advertiser has periodic advertising sync information, the sniffer follows the periodic advertising train.