Rpi3 usb wifi bridge

I have LEDE running on my raspberry pi 3. I want to be able to use a USB wifi stick (special outdoor long gain) and bridge it to the ethernet port.
I can see the internal wifi but not the USB wifi on the gui. Its a RT3070 chipset.
Any ideas how to get the USB wifi working?

Thanks

Did you install the required kmods for your device?

opkg update && opkg install kmod-rt2800-lib kmod-rt2800-usb kmod-rt2x00-lib kmod-rt2x00-usb
reboot
ifconfig wlan1 up

Thanks that's what I was after.
Although can't get to install I have a read only error

Can you post the exact output here?

I've produced a new image and all OK for the install now.
But I can't get it to bridge the 2 networks together. Is it as simple as selecting the LAN and choosing to bridge the Wifi network and the LAN network? I do this but it doesn't seem to bridge.