This library provides Virtual COM port on USB OTG. This means, that you don’t need external USB->UART converter (like FTDI) to communicate with computer. STM32F4xx will be seen to computer like COM port. Library can be used on all STM32F4xx devices. It has also features to support STM32F4- and STM32F429 Discovery boards. To use USB with HAL, check my HAL USB library. Library Features Enables USB VCP Works in USB FS mode Default for STM32F4-Discovery board Works in USB HS...