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RSU(4)		       FreeBSD Kernel Interfaces Manual			RSU(4)

NAME
     rsu -- Realtek RTL8188SU/RTL8192SU	USB IEEE 802.11b/g/n wireless network
     device

SYNOPSIS
     rsu* at uhub? port	?

DESCRIPTION
     The rsu driver supports USB 2.0 wireless network devices based on Realtek
     RTL8188SU,	RTL8191SU and RTL8192SU	chipsets.

     The RTL8188SU is a	highly integrated 802.11n adapter that combines	a MAC,
     a 1T1R capable baseband and an RF in a single chip.  It operates in the
     2GHz spectrum only.

     The RTL8191SU is a	highly integrated multiple-in, single-out (MISO)
     802.11n adapter that combines a MAC, a 1T2R capable baseband and an RF in
     a single chip.  It	operates in the	2GHz spectrum only.

     The RTL8192SU 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.

     These are the modes the rsu driver	can operate in:

     BSS mode	    Also known as infrastructure mode, this is used when asso-
		    ciating with an access point, through which	all traffic
		    passes.  This mode is the default.

     The rsu driver can	be configured to use Wired Equivalent Privacy (WEP) or
     Wi-Fi Protected Access (WPA1 and WPA2).  WPA2 is the current encryption
     standard for wireless networks.  It is strongly recommended that neither
     WEP nor WPA1 are used as the sole mechanism to secure wireless communica-
     tion, due to serious weaknesses.  WPA1 is disabled	by default and may be
     enabled using the option "wpaprotos wpa1,wpa2".  For standard WPA net-
     works which use pre-shared	keys (PSK), keys are configured	using the
     "wpakey" option.  WPA-Enterprise networks require use of the wpa_suppli-
     cant package.

     The rsu driver can	be configured at runtime with ifconfig(8) or on	boot
     with hostname.if(5).

FILES
     The driver	needs at least version 1.1 of the following firmware file,
     which is loaded when an interface is attached:

	   /etc/firmware/rsu-rtl8712fw

     A prepackaged version of the firmware can be installed using
     fw_update(1).

HARDWARE
     The following adapters should work:

	   ASUS	USB-N10
	   ASUS	WL-167G	V3
	   Belkin F7D1101 v1
	   D-Link DWA-131 A1
	   Hercules HWGUn-54
	   Hercules HWNUm-300
	   Planex GW-USNano
	   Sitecom WL-349 v1
	   Sitecom WL-353
	   Sweex LW154
	   TRENDnet TEW-648UB
	   TRENDnet TEW-649UB

EXAMPLES
     The following example scans for available networks:

	   # ifconfig rsu0 scan

     The following hostname.if(5) example configures rsu0 to join network
     "mynwid", using WPA key "mywpakey", obtaining an IP address using DHCP:

	   nwid	mynwid wpakey mywpakey
	   dhcp

DIAGNOSTICS
     rsu0: error N, could not read firmware ...	 For some reason, the driver
     was unable	to read	the microcode file from	the filesystem.	 The file
     might be missing or corrupted.

     rsu0: 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
     arp(4), ifmedia(4), intro(4), netintro(4),	usb(4),	hostname.if(5),
     ifconfig(8)

HISTORY
     The rsu driver first appeared in OpenBSD 4.9.

AUTHORS
     The rsu driver was	written	by Damien Bergamini
     <damien.bergamini@free.fr>.

CAVEATS
     The rsu driver does not support any of the	802.11n	capabilities offered
     by	the adapters.  Additional work is required in ieee80211(9) before
     those features can	be supported.

     This driver does not support powersave mode.

FreeBSD	13.0		       November	10, 2019		  FreeBSD 13.0

NAME | SYNOPSIS | DESCRIPTION | FILES | HARDWARE | EXAMPLES | DIAGNOSTICS | SEE ALSO | HISTORY | AUTHORS | CAVEATS

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