NAME

       urtwn — Realtek RTL8188CU/RTL8188EU/RTL8192CU USB IEEE 802.11b/g/n wireless network device

SYNOPSIS

       To compile this driver into the kernel, place the following lines in your kernel configuration file:

             device ehci
             device uhci
             device ohci
             device usb
             device urtwn
             device wlan

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             if_urtwn_load="YES"

       In  both  cases,  place  the  following  line  in loader.conf(5) to acknowledge the firmware license (see
       below):

             legal.realtek.license_ack=1

DESCRIPTION

       The urtwn driver supports USB 2.0 wireless network devices based on  Realtek  RTL8188CUS,  RTL8188CE-VAU,
       RTL8188EUS, RTL8188RU and RTL8192CU chipsets.

       The  RTL8188CUS  and  RTL8188EUS are highly integrated 802.11n adapter that combine a MAC, a 1T1R capable
       baseband and an RF in a single chip.  They operate in the 2GHz spectrum only.  The RTL8188RU is  a  high-
       power  variant  of the RTL8188CUS.  The RTL8188CE-VAU is a PCI Express Mini Card adapter that attaches to
       the USB interface.

       The RTL8192CU is a highly integrated multiple-in, multiple-out (MIMO) 802.11n  adapter  that  combines  a
       MAC, a 2T2R capable baseband and an RF in a single chip.  It operates in the 2GHz spectrum only.

       This  driver  requires the firmware built with the urtwnfw module to work.  For the loaded firmware to be
       enabled for use the license at /usr/share/doc/legal/realtek must be agreed by adding the  following  line
       to loader.conf(5):

             legal.realtek.license_ack=1

FILES

       /usr/share/doc/legal/realtek  urtwn firmware license

HARDWARE

       The  urtwn  driver  supports  Realtek  RTL8188CU/RTL8188EU/RTL8192CU  based USB IEEE 802.11b/g/n wireless
       network adapters, including:

             ASUS USB-N10 NANO
             Belkin F7D1102 Surf Wireless Micro
             D-Link DWA-125 rev
             D-Link DWA-131
             Edimax EW-7811Un
             Netgear WNA1000M
             Realtek RTL8192CU
             Realtek RTL8188CUS
             TP-LINK TL-WN723N v3
             TP-LINK TL-WN725N v2

EXAMPLES

       Join an existing BSS network (i.e., connect to an access point):

             ifconfig wlan create wlandev urtwn0 inet 192.168.0.20 \
                 netmask 0xffffff00

       Join a specific BSS network with network name “my_net”:

             ifconfig wlan create wlandev urtwn0 ssid my_net up

       Join a specific BSS network with 64-bit WEP encryption:

             ifconfig wlan create wlandev urtwn0 ssid my_net \
                     wepmode on wepkey 0x1234567890 weptxkey 1 up

DIAGNOSTICS

       urtwn%d: error %d, could not read firmware %s  For some  reason,  the  driver  was  unable  to  read  the
       microcode file from the filesystem.  The file might be missing or corrupted.

       urtwn%d:  device  timeout   A frame dispatched to the hardware for transmission did not complete in time.
       The driver will reset the hardware.  This should not happen.

SEE ALSO

       intro(4), netintro(4), urtwnfw(4), usb(4), wlan(4), wlan_ccmp(4), wlan_tkip(4), wlan_wep(4), ifconfig(8),
       wpa_supplicant(8)

       Realtek, http://www.realtek.com.tw.

HISTORY

       The urtwn driver first appeared in OpenBSD 4.9 and FreeBSD 10.0.

AUTHORS

       The urtwn driver was written by Damien Bergamini <damien@openbsd.org>.

CAVEATS

       The urtwn driver does not support any of the 802.11n capabilities offered by the adapters.

Debian                                             May 3, 2014                                          URTWN(4)