TP-Link TL-WN727N V3 - cannot scan or connect to anything

[Thomas Mueller]

from Toomas AAS:

> Hello Adrian!

> Thanks for the idea.
 
> I tried with just "ifconfig wlan0 up". Indeed it seems that the "scan"
> is redundant, as wlandebug output shows that a scan is started
> immediately after I issue the "ifconfig wlan0 up" command. Alas, the
> scan result is still the same as in my original message, and "ifconfig
> wlan0 list scan" shows no results.

Surprise that scan would occur gratuitously.  When I type

ifconfig wlan0 create wlandev rsu0 wlanmode sta

I don't get any scan.  But I can follow with
wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf
and this connects or associates.  I still need

dhclient wlan0  
or
ifconfig wlan0 inet 192.168.0.101 netmask 255.255.255.0
route add default 192.168.0.1

This is for Hiro H50191 USB-stick wireless adapter.
Chipset is RTL8191SU, FreeBSD >= 10 device rsu.

With re(4) bug, this is my only way for Internet access from FreeBSD on
MSI Z77 MPOWER motherboard.

Tom