Android USB Serial Connection

[winterroot]

I have some code that I use to transfer data over USB to an Android device. When I plug an UNO in my Android app, Android automatically detects the Arduino and triggers my code that initiates communication. When I plug a Feather into my Android device, the Android never recognizes that there is a USB device available for communication. It appears that the USB port on the Feather might not have the same features as the USB port on the UNO. Is there a way that I can initialize communication with the Feather in the same way as I do with the UNO. What is different between the two.

[winterroot]

So what Usb to Serial converted does the Feather use ?

[winterroot]

OK the Android library was set up to filter by a vendor id, different from the Feather's. Resolving that, it does connect.