another UsbSerial - baudrate question

hello,
I'm using usbserial with an FTDI device , I can send and receive data , but only at baudrate of 9600 .
Now I noticed that the baudrate parameter in usb.Open is ignored if the connected device is an accessory .

Code:

  Dim usb As UsbSerial
Dim dev As Int
dev = usb.Open(19200)  

in my code dev = 2 ( usb_accessory)

How come you can't change the baudrate of an accessory ? And why is my ftdi device recognized as an accessory and not as an usb_device, can I change this ?

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