RTL8188CE PCIe IEEE 802.11b/g/n wireless network device
rtwn* at pci? port ?
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
These are the modes the rtwn
driver can operate in:
- 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.
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.
driver can be configured at runtime with
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
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:
- 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
- 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
driver first appeared in
driver was written by
It was based on the urtwn(4)
driver written by Damien Bergamini
driver does not support any of the 802.11n
capabilities offered by the adapters. Additional work is required in
features can be supported.