root@odroid:~# lsusb

Bus 001 Device 002: ID 0bda:8179 Realtek Semiconductor Corp. RTL8188EUS 802.11n Wireless Network Adapter

root@odroid:~# lshw -C network | less 

  *-network:0
       description: Wireless interface
       physical id: 7
       bus info: usb@1:1
       logical name: wlan0
       serial: d4:6e:0e:1a:12:7b
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=r8188eu multicast=yes wireless=unassociated

root@odroid:~# sudo wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant/wlan09.conf

Successfully initialized wpa_supplicant
nl80211: Driver does not support authentication/association or connect commands
nl80211: deinit ifname=wlan0 disabled_11b_rates=0
wlan0: Failed to initialize driver interface

root@odroid:~# sudo wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant/wlan09.conf -D wext

Successfully initialized wpa_supplicant
rfkill: Cannot get wiphy information
ioctl[SIOCSIWAP]: Operation not permitted
ioctl[SIOCSIWENCODEEXT]: Invalid argument
ioctl[SIOCSIWENCODEEXT]: Invalid argument
ctrl_iface exists and seems to be in use - cannot override it
Delete '/run/wpa_supplicant/wlan0' manually if it is not used anymore
Failed to initialize control interface '/run/wpa_supplicant'.
You may have another wpa_supplicant process already running or the file was
left by an unclean termination of wpa_supplicant in which case you will need
to manually remove this file before starting wpa_supplicant again.
ioctl[SIOCSIWAP]: Operation not permitted

root@odroid:~# cat /etc/wpa_supplicant/wlan09.conf


ctrl_interface=/run/wpa_supplicant
update_config=1