One day, GS Labs research and development center launched a project to identify possible bugs and vulnerabilities in its systems. However, the tested device chosen to run the application was pretty tricky: no way to install the root and no Ethernet connection. The only available communication methods were Wi-Fi and a remote control with a few buttons – so, who knows what’s going to be transferred via Wi-Fi? Hackers do not like uncertainty. Hackers like certainty. I had a couple of ESP32-based debug boards at home (the ESP32-PICO-KIT), and decided to build a Wi-Fi sniffer with the potential to be upgraded to a Bluetooth sniffer.