FREE USB Sniffer & Software USB Protocol Analyzer for Windows
GitHub - switchcraft/Serial-port-sniffer: A RS232 serial port sniffer with USB interface.
CC2531 Sniffer USB dongle protocol analyzer to serial port Sniffer packet - Price history & Review | AliExpress Seller - YX Electronic Components | Alitools.io
CC2531 Sniffer USB dongle Protocol analyzer Serial port Sniffer packet | eBay
Reverse engineering software: analyze serial and USB data
BLE Sniffer with nRF52840 | Adafruit Learning System
ITEAD Launches a $4 Zigbee CC2531 packet sniffer For USB devices - Electronics-Lab.com