Now we can connect usb keyboard,mouse and joystick direct to ESP32 board Brings back memories of V-USB from Obdev and USBasp AVR programmer which uses this on an ATmega8 to bit-bang 1.5Mbit/s USB ...

“USB TTL is developed with the advanced CP2102 and CH340 chipsets, which are 2.0 compliant and come with standard USB type A male, Type C, Micro USB, and TTL 6pin connectors. 3.3V, VCC, RTS, TXD ...

It uses the USB-to-UART bundled with the ESP32 for the “USB” part. And then implements the serial HCI for the “Bluetooth dongle” part.