Problkems with NUCLEO-H743ZI2 onboard ST-Link

[Moritz1]

Hello,
I bought a NUCLEO-H743ZI2 board.

When I plugged it in for the first time, I was able to flash it after two or three attempts (ST-Link was often not recognised).

But now the STM32CubeProgrammer does not recognise the ST-Link at all (I have tried more than 20 times with different USB cables).
When I plug the board into the PC, I get a virtual COM port "STMicroelectronics STLink Virtual COM Port (COM23)" in the device manager.
So the ST-Link seems to communicate. But the programmer still does not recognise it.

What could be the reason?

[Mike_ST]

Hello,

Please have a look at this post:

Unable to connect to STM32H7 devices 

[Moritz1 · Accepted solution]

This is not my Problem.

My problem was that the on-board ST-Link was not recognices.

But I found a solution: This problem only happens if I connect the NUCLEO Board via my USB hub to the Laptop.

If I connect it directly to the Laptop it works fine.

[Tesla DeLorean]

Hubs and Docking Stations have historically been an issue. Gets particularly troublesome with External Loaders, and pushing 8 - 32MB of data, and the connection randomly failing mid process. Issue with board/drivers and ability to recover / retry