URTWN(4)						   BSD Kernel Interfaces Manual 						  URTWN(4)

NAME

     urtwn -- Realtek RTL8188CU/RTL8188RU/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/RTL8188RU/RTL8188EU/RTL8192CU based USB IEEE 802.11b/g/n wireless network adapters, including:

	   Alfa AWUS036NHR v2
	   ASUS USB-N10 NANO
	   Belkin F7D1102 Surf Wireless Micro
	   D-Link DWA-123 rev
	   D-Link DWA-125 rev
	   D-Link DWA-131
	   Edimax EW-7811Un
	   Elecom WDC-150SU2M
	   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.

BSD
								 October 24, 2014							       BSD