Start hacking Bluetooth Low Energy today! (part 3) 

This post outlines practical techniques for BLE testing using Nordic nRF development kits and Sniffle, including setting up the Zephyr Bluetooth shell, sniffing with the Nordic/NRF52 Wireshark plugin, scanning and connecting to a target tag, performing GATT discovery, issuing characteristic writes to trigger the device’s alarm, and scripting interactions via serial; it also compares Nordic sniffing to Sniffle and provides step-by-step instructions to build and flash Zephyr firmware (including net core setup) on the DK.