Simple WiFi sniffer for boards based on the Espressif Systems ESP32 module
The sketch shall be compiled with Arduino IDE configured with the proper ESP32 plugin (https://github.com/espressif/arduino-esp32).
The code is based on the work of Łukasz Podkalicki (http://blog.podkalicki.com/esp32-wifi-sniffer/) modified in order to be correctly compiled with Arduino IDE.