Yet another chinese usb-serial IC on "arduino"?

[oPossum]

It identifies as USB CDC (communications device class) so it doesn't need a manufacturer specific driver.

[westfw]

It identifies as USB CDC

WCH, and perhaps others, do have a new series of chips (ch910x?) that identify as standard CDC/ACM devices, so as not to require custom drivers.

[Amper]

@paf: Thank you very very much, i didnt expect someone to go through the trouble of confirming what ive seen

Yes, mine listed under windows as 0403 but still did not work. Also it does not work as serial device anywhere so i guess its something different still.
Ill reprogram mine with the minicore and try again, so far i just tried programming it via isp and put the stuff aside as soon as it shown up as PB and went back to my trusty STM for the sake of time....

[per1234]

lsusb on Linux/OSX gives a very strange ID:
============
  idVendor           0x0843
  idProduct          0x5740

Thanks for sharing this information @paf! I make some efforts to support the users having problems with boards that have these strange chips over on Arduino Forum, but am hindered by not having one of the bad boards myself. So your findings are very interesting to me.

Does the board also have this 0843:5740 VID/PID pair on Windows?

If you are using Arduino IDE, a convenient way to get the VID/PID pair is:

• Connect the board to your computer with a USB cable.
• Select the port of the board from Arduino IDE's Tools > Port menu.
• Select Tools > Board Info from the Arduino IDE menus.

A dialog will open that shows the VID/PID pair after you do that.

Alternatively, you can get the VID/PID pair using the Windows Device Manager.

[paf]

Yes, the boards have always the same 0843:5740 ID on Windows.
Tested on Windows 10 using the "Device Manager" and on Arduino IDE it also gives the same values:

BN: Unknown board
VID:  0X0843
PID:  0x5740
SN:   FX2384N

If you need anything more, just ask.