Arduino for STM32

the usb connector is properly soldered, i did a continuity test with a multimeter and everything is ok.

I bought another pills and those one work fine. It is really a issue with the first one.
Here is a picture of the 2 items, they looks fine, even if the PCB is not the same, the components seems to be well soldered.
https://nsa40.casimages.com/img/2021/05/21/mini_210521104536294057.jpg https ...

those board drive me crazy !

i've just remove the "windows signature enforcement" (? i dont know how to call it in english) to install the drivers and after that, the boards does not work at all on my laptop ! the sketch upload is ok with the st-link, but the boards are not recognized anymore by my ...

Hello, thank you for your answer.

I succeed booting into DFU mode on my main computer, I did connect the USB cable directly to the USB port on the motherboard, on the front panel it is random :-/

this is the V/PID of the device found when on DFU : USB\VID_1EAF&PID_0003\LLM_003

Did I miss ...

Hello,

I have a problem with my blue pill, i uploaded the bootloader generic_boot20_pc13.bin to the board using a ST-Link V2 and the STM32 St-Link Utility, verify everything and this step seems to be OK. after replacing the jumpers on 0, i remove the board from the programmer, connect the board on ...