That interface doesn’t have to be special, and [Dakhnod] is here to show us that it can be done with an ESP32 microcontroller through its USB interface. The linked repository doesn’t tell us ...

with this project which turns the ESP32 into a USB host. USB is not a native feature on all microcontrollers or even Arduino-compatible boards. While some do have it built in like those based on ...

Tarlogic developed a new C-based USB Bluetooth driver ... take control over the ESP32 chips and to gain persistence in the chip via commands that allow for RAM and Flash modification." ...