A security researcher wants to reverse engineer a cheap BLE garage door opener. They pair their phone with the opener. They run the nRF Sniffer on a Raspberry Pi (which the dongle fits perfectly). They capture the pairing process. They extract the LTK from the phone’s Bluetooth log (on Android, via btsnoop ). They feed that LTK into Wireshark. Suddenly, the encrypted "Open" command appears as clear text. This allows the researcher to replay the attack. For $20 in hardware, they have defeated a $100 smart lock.
By default, the sniffer "follows" a connection by observing the Initialization procedure . Once it sees a CONNECT_REQ PDU, it extracts the hop interval and channel map. It then synchronizes. nrf sniffer for bluetooth le download nordic
Nordic has hinted at updated firmware for the nRF5340 (dual-core ARM M33) that could handle the real-time demodulation of LE Audio. For now, the nRF Sniffer remains the best tool for legacy GATT and connection-oriented debugging, but it is not yet a full LE Audio analyzer. If you are a hobbyist trying to talk to a $5 HM-10 module, the nRF Sniffer is overkill. Use a serial monitor. A security researcher wants to reverse engineer a