What hardware cybersecurity tools did you actually build at home?
I know replicating a complex, multi-tool like the Flipper Zero at home isn't feasible. Instead, I’m interested in any single-purpose, DIY gadgets built to fulfill a specific cybersecurity purpose.
For those who build their own pentesting or hardware hacking tools instead of buying commercial gear:
What boards did you use? (ESP32, Raspberry Pi , Arduino, etc.)
What specific tools/hardware did you need?
What open-source firmware or software libraries did you flash onto it?