Hi Robert,
I am not sure the pluggable usb-to-ethernet converter works for BBBw micro USB port. Have you ever tried one?
Plugable Network Adapter - USB 2.0 to 10/100 Ethernet
https://plugable.com/products/usb2-e1000/
It works for Android Phone, through.
It seems the usb converter doesn’t have power when it connected.
Thank you,
David