An Arduino-ESP32 sketch that brings up the Bluedroid stack in dual-mode (Classic + BLE) and dumps discovered devices in pairing/inquiry mode (MIT). Discovery only, no pairing or connection. Classic (BR/EDR) discovery needs the original ESP32, not the C-series, which has no Bluetooth Classic radio.
Lifecycle not assessed: nobody has checked yet whether this tool is still maintained, sold or working. Check the project's own page before relying on it.