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RSU(4)                   BSD 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 (WPA-PSK and WPA2-PSK).  WPA is the current
     encryption standard for wireless networks.  It is strongly recommended
     that WEP not be used as the sole mechanism to secure wireless communica-
     tion, due to serious weaknesses in it.

     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.

BSD                             April 27, 2017                             BSD