STM32WB5MMGH6TR USB serial port (COM)

AndrewFFFF · ‎2025-09-01

Good morning

I must project a board in this way:

This baord will be connect to usb -c of the computer.

There will be a converter 5V --> 3.3V.

A MCU with bluetooth and antenna integrated.

The goal is: the computer must recognize the board like USB serial Port (COMx) like a FTDI? So.. not virtual COM.

My question is: can the computer recognize STM32WB5MMGH6TR like a serial USB serial Port (COMx)?

Does it need some drivers about it?

FBL · ‎2025-09-01

Hi @AndrewFFFF

You can implement the USB CDC-ACM in your firmware. It does not have a built-in USB-to-UART hardware bridge like FTDI, so it’s a virtual COM port from the PC perspective. You can refer to this as reference board for HW implementation.

On Windows 10 and later, no additional driver is typically needed because the OS includes a generic USB CDC driver. On older Windows versions, you may need to install a driver manually.

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