How to get COM ports / UARTs in Windows 11

mellen
mellen New Member Posts: 2 ✭
in UP 7000 Windows

I have installed Win 11 IoT LTSC on an UP 7000.

It's working fine except I can't see either UART (CN7 or on the GPIO) as a COM port.

I have installed all the drivers listed here and even updated the BIOS, but no luck.

I used device manager to "add legacy hardware" and added a communication port, which was then listed as COM3 in device manager, but neither python (via pyserial), nor putty could access it.

How do I get access to the UARTs?

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  • HarryChiu
    HarryChiu New Member Posts: 196 ✭✭✭
    Answer ✓

    Hi @mellen

    The settings of bios needs to be modified.
    Please enter bios with passowrd "upassw0rd", and enter CRB setup in main page.

    CRB setup > CRB chipset > PCH-IO configuration > SerialIO config
    Change UART0-2 to communication port.
    After modification, press F4 to save and exit.

    Go back to Windows Device Manager and you will see three COM:
    COM1 is the UART on HAT40 pin8,pin10.
    COM2 is on CN7.

    Best Regards,
    Harry Chiu

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