Realtek RTL8188CE PCIe IEEE 802.11b/g/n
wireless network device
rtwn* at pci? port ?
rtwn driver supports PCIe wireless
network devices based on the Realtek RTL8188CE chipset.
The RTL8188CE 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.
These are the modes the
rtwn driver can
- BSS mode
- Also known as infrastructure mode, this is used when associating with an access point, through which all traffic passes. This mode is the default.
- monitor mode
- In this mode the driver is able to receive packets without associating with an access point. This disables the internal receive filter and enables the card to capture packets from networks which it wouldn't normally have access to, or to scan for access points.
rtwn 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 communication, due to serious weaknesses in it.
rtwn driver can be configured at
ifconfig(8) or on boot with
The driver needs at least version 1.0 of the following firmware files, which are loaded when an interface is brought up:
A prepackaged version of the firmware can be installed using fw_update(1).
The following example scans for available networks:
# ifconfig rtwn0 scan
The following hostname.if(5) example configures rtwn0 to join network “mynwid”, using WPA key “mywpakey”, obtaining an IP address using DHCP:
nwid mynwid wpakey mywpakey dhcp
- rtwn0: 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.
- rtwn0: 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.
arp(4), ifmedia(4), intro(4), netintro(4), pci(4), hostname.if(5), ifconfig(8)
rtwn driver first appeared in
rtwn driver was written by
It was based on the
urtwn(4) driver written by Damien Bergamini
rtwn driver does not support any of
the 802.11n capabilities offered by the adapters. Additional work is
ieee80211(9) before those features can be supported.