nRF Sniffer for Bluetooth LE v4.1.x


The glossary contains terms and acronyms that are used in this document.

Development Kit (DK)

A hardware development platform used for application development.


Long Term Key (LTK)

A key that is stored by both devices after the Bluetooth® Low Energy pairing procedure has establishing a bond. The Long Term Key is either distributed by the peripheral device (when using legacy pairing) or derived from a Diffie-Hellman exchange (when using LE Secure Connections). The key is stored in both devices and is used to encrypt connections between the two devices.


Out of Band (OOB)

A communication channel that is outside of the defined activity. For example, in Bluetooth® Low Energy, Out of Band pairing can be used to share encryption keys or authentication data using a different communication channel (such as NFC).


Received Signal Strength Indication (RSSI)

An indication of the power of a received radio signal.


Universal Serial Bus (USB)

An industry standard that establishes specifications for cables and connectors and protocols for connection, communication, and power supply between computers, peripheral devices, and other computers.



A free software tool that captures wireless traffic and reproduces it in a readable format. It is a cross-platform network protocol analyzer that can be used to view, analyze, and troubleshoot packets sent over a data network.