MediaTek USB IEEE 802.11b/g/n wireless
mtw* at uhub? port ?
mtw driver supports USB 2.0 wireless
adapters based on the MediaTek MT7601U chipset.
These are the modes the
mtw 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.
mtw 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 communication, due to serious weaknesses. WPA1
is disabled by default and may be enabled using the option
wpa1,wpa2". For standard WPA networks which use
pre-shared keys (PSK), keys are configured using the
wpakey" option. WPA-Enterprise networks
require use of the wpa_supplicant package. The
driver offloads both encryption and decryption of data frames to the
hardware for the WEP40, WEP104, TKIP(+MIC) and CCMP ciphers.
mtw driver can be configured at
runtime with ifconfig(8) or on boot with
The driver needs the following firmware files, which are loaded when an interface is brought up:
The following adapters should work:
- ASUS USB-N10 v2
- D-Link DWA-127 rev B1
- Edimax EW-7711UAn v2
- Edimax EW-7711ULn v2
- Foxconn WFU03
- Tenda U2
- Tenda W311MI v2
- TP-LINK TL-WN727N v4
- Yealink WF40
The following example scans for available networks:
# ifconfig mtw0 scan
The following hostname.if(5) example configures mtw0 to join network “mynwid”, using WPA key “mywpakey”, obtaining an IP address using DHCP:
join mynwid wpakey mywpakey inet autoconf
- mtw0: 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.
- mtw0: could not load firmware
- An error occurred while attempting to upload the microcode to the onboard 8051 microcontroller unit.
- mtw0: 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), usb(4), hostname.if(5), ifconfig(8)
mtw driver first appeared in
mtw driver was written by
based on the run(4) driver by Damien Bergamini
mtw driver does not support any of the
802.11n capabilities offered by the MT7601U chipset. Additional work is
required in ieee80211(9) before those features can be supported.
This driver does not support powersave mode.