FreeNAS Wireless Woes Revision as of Monday, 21 December 2015 at 02:30 UTC

Attempted a Netgear N300
with the BCM43231 chipset, assuming that the
bwi driver
could be loaded via a
tunable.

Nope. This is all I saw in messages

 May  4 19:03:18 Archivum kernel: ugen3.2:  at usbus3 (disconnected)
 May  4 19:03:45 Archivum root: Unknown USB device: vendor 0x0846 product 0x9020 bus uhub3
 May  4 19:03:45 Archivum kernel: ugen3.2:  at usbus3

Will have to research and try another card/dongle.

References