STM32F103VET6 and CH340G

[gazy98]

Hi people !
I have a problem with my PCB. I recieved it a few days ago and it is already completly presoldered. If i connect it via USB-TYPE B to my pc it is showing me nothing in device menager.... The CH340G should be visible to be able to programm it via usb....


If i connect it via micro-usb unknown device is popping up. But that does not help me .

I have added the schematic. Hope someone can help me.

 

[andre_luis]

It is likely you don`t have the driver installed.
Refer to this link:

https://www.arduined.eu/tag/ch340g/

 

[gazy98]

The driver is installed. If i connect an arduino Mega with ch340 it is showing up....

 

[andre_luis]

If i connect an arduino Mega with ch340 it is showing up....

Do you see it as a COM device ?

 

[FvM]

CH340G 3.3V bypass capacitor missing.

 

[gazy98]

bypass capacitor is installed but still no function....