It helps. I founded it about 2 hours ago. The connection is ok but If I set a brekpoint, the microcontroller does not stop in the place.
The code is very simple, I added only one line where the LED is on into standard code generated by STM32CubeMx.
I thought that was problem with connection with NUCLEO and the described method did not work for 100%. I decided to solve problems with errors which I have without using the solution https://visualgdb.com/tutorials/stm32/sleep/.
Now I do not know where exactly there is a problem. Still problem with proper connection or someting wrong I do with the breaking point. I saw and read many tutiorials and no one is doing anything special only connect board, configure, set breakpoint and that’s all 🙂
Regards
Arthur