Hello! I have a nucleo-f042 board and notices something funny. When I use a usb hub or my docking station I get the "No ST-Link detected." Strangely I am still able to re-flash the firmware and see it's serial number in the Cube IDE.

[Tesla DeLorean]

And?

Issues with docking stations and USB hubs has been a long standing issue with STM32 / ST-LINK, it's top of the list in my responses to most questions about failed connections, along with poor quality and charging cables with no data wires.

[Pavel A.]

The debugger of CubeIDE and CubeProgrammer have different software interfaces to access ST-LINK. One of them is goofier than another.

Another frequent mistake: before connecting to the ST-LINK, make sure that other programs are NOT accessing it. Only one program can connect to ST-LINK (unless you're using "shared" mode which is advanced)

[RIvan.3]

I am positive that other programs are not using it. It's a matter of changing the usb the St-Link is connected from the docking station to directly the laptop and it is working. But the other way around I get the error. I was wondering if there is a workaround for this? My laptop is really limited in usbs and I'm working on a project that would require a rs485 network and would like to re-flash each chip on the fly instead of unplugging and re-plugging one board at a time, all the time.

[AScha.3]

i tried now on my pc (runs on Linux MX ) : one STlink on USB connected, then second STlink attached ->

test debug in STM32cubeIDE

• STlink direct at USB : ok.
• STlink at USB hub (old usb1): ok.
• STlink at USB hub (hi speed, usb2, 480Mbit) : ok.
• STlink at (cheap standard 12Mbit) USB hub : ok.

so i think, try another hub or use other system.