COM port not opening on USBD_BLE_UART example for nRF52840

I am trying to run the USBD_BLE_UART for nRF52840 on a PCA10056 board.

I installed the USB driver that comes with the SDK (17.1.0).

My computer is running Windows 11.

Windows recognizes the device, since I can see the device in Device Manager

However, I've tried using terminal and hterm to connect to the COM port and while these apps thing that the COM port is open, the PCA10056 board LED 3 doesn't stop blinking, meaning that the COM port isn't open in the dev board, it stays blinking.

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  • Hi Victor, 
    I assume you connected both the USB on the left hand side of the DK and the USB port on south side as well (nRF USB) , correct  ? 

    Have you tried to test with the usbd_cdc_acm example ? Do you see any thing print out on the COM port ? 
    Have you checked to see any log on the DK's UART port (not the nRF USB) ? 

  • Hi, while trying a few things I turned on DTR and that made the connection. Thanks.

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