Rt2870

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Introduction

NOTE: As of linux kernel 3.0 the rt2800usb driver automatically works with devices using the rt2870 chipset.

This entry is to aid you in configuring wireless settings for use with devices built with Ralink's rt2870 chipset. I hope that this entry will encourage further contribution regarding the configuration of ralink drivers.

Template:Box Note

Installation (kernels from 2.6.29 to 2.6.39)

Since version 2.6.29 this driver has been included in the kernel

Installation - source

  • Install the Drivers
    • Grab the tarball from the following AUR package:
    • Extract the Tarball
      • tar xvf rt2870.tar.gz
    • Enter the rt2870 directory and build and install the driver; the driver installed will be called rt2870sta.ko
      • makepkg -i
  • To simplify things, create a kernel module alias by and appending the following line to Template:Filename:
alias ra0 rt2870

See Kernel_modules#Aliasing for more info.

Configuration

This driver is best configured using tools that utilize the standard wireless extensions, such as wpa_supplicant, Template:Codeline, and their front-ends.

Various driver specific options can be configured using iwpriv.

Configuration - File (maybe obsolete)

This section is to help you with the configuration file used to set the parameters of the device when it is brought up (e.g. ifconfig ra0 up).

  • First, go into the src/ directory where you built the package and into the source code's directory. For example
cd ~/AUR/rt2870/src/2008_0925_RT2870_Linux_STA_v1.4.0.0
  • Copy the RT2870STA.dat file to /etc/Wireless/RT2870STA (if the directory doesn't exist, create it)
cp RT2870STA.dat /etc/Wireless/RT2870STA

Initial Configuration

  • In this file, the first line must always contain the word Default, so it should be on the first line.
Default
  • Change the country/region channel number to the one that corresponds to your network:
    • 0: channels 1 through 11
    • 1: channels 1 through 12
    • 2: channels 10 and 11 (according to ralink)
    • 3: channels 10 through 13
    • 4: channel 14
    • 5: channels 1 through 14
    • 6: channels 3 through 9
    • 7: channels 5 through 13

My configuration

CountryRegion=0
  • Add your country code. Valid country codes include the following
AG, AR, AW, AU, AT, BS, BB, BM, BR, BE, BG, CA, KY, CL, CN, CO, CR, CY, CZ, DK, DO, EC, SV, FI, FR, DE, GR, 
GU, GT, HT, HN, HK, HU, IS, IN, ID, E, IL, IT, JP, JO, LV, LI, LT, LU, MY, MT, MA, MX, NL, NZ, NO, PE, PT, 
PL, RO, RU, SA, CS, SG, SK, SI, ZA, KR, ES, SE, CH, TW, TR, GB, UA, AE, US, VE

My configuration

ConuntryCode=US
  • Edit the ssid to your network's ssid using either characters 0-z or 1~32 ascii characters

For example

SSID=mywirelessnetwork
  • Change the newtork type to whatever type of network you are using:
    • Infra (for Infrastructure)
    • Adhoc (for Ad-hoc)

My configuration

NetworkType=Infra
  • Edit the wireless mode using numbers 0 through 10:
    • 0: legacy 11b/g mixed
    • 1: legacy 11b only
    • 2: legacy 11a only
    • 3: legacy 11a/b/g mixed
    • 4: legacy 11g only
    • 5: 11a/b/g/n mixed
    • 6: 11n only
    • 7: 11g/n mixed
    • 8: 11a/n mixed
    • 9: 11b/g/n mixed
    • 10: 11a/g/n mixed

I use 0

WirelessMode=0
  • Edit the channel number. This must correspond to the CountryRegion setting.

My configuration

Channel=10

Authentication

Template:Box Note

  • Set authmode to one of the following options:
    • Open (for WEP)
    • WPA (WPA with WPA Supplicant)
    • WPA2 (WPA2 with WPA supplicant)
    • WPAPSK
    • WPA2PSK

The WPA and WPA2 options should work with netcfg and networkmanager. I use WPA so,

AuthMode=WPA
  • Set the encryption type to one of the following:
    • WEP
    • TKIP
    • AES
    • None

I use TKIP, so

EncrypType=TKIP

WPA

  • If you're using WPA, set your WPAPSK
WPAPSK=mysecretkey

WEP

  • If you're using WEP, first set the key index using numbers 1 through 4

For example,

DefaultKeyID=1
  • Now, set the key type (of your corresponding key index) so it know what kind of key to look for:
    • 0: hex
    • 1: ASCII string
Key1Type=0
  • Provide your WEP key according to type, for example

For a string key

Key1Str=mysecretwepkey

For a hex key

Key1=01234

Examples

Here are some example options for reference.

RT2870STA.dat

Default
CountryRegion=0
CountryRegionABand=7
CountryCode=US
ChannelGeography=1
SSID=mywirelessnetwork
NetworkType=Infra
WirelessMode=0
Channel=10
BeaconPeriod=100
TxPower=100
BGProtection=0
TxPreamble=1
RTSThreshold=2347
FragThreshold=2346
TxBurst=0
PktAggregate=0
WmmCapable=0
AckPolicy=0;0;0;0
AuthMode=WPA
EncrypType=TKIP
WPAPSK=mysecretkey
DefaultKeyID=1
Key1Type=0
Key1Str=
Key2Type=0
Key2Str=
Key3Type=0
Key3Str=
Key4Type=0
Key4Str=
PSMode=CAM
FastRoaming=0
RoamThreshold=70
APSDCapable=0
APSDAC=0;0;0;0
HT_RDG=1
HT_EXTCHA=0
HT_OpMode=1
HT_MpduDensity=4
HT_BW=1
HT_AutoBA=1
HT_BADecline=0
HT_AMSDU=0
HT_BAWinSize=64
HT_GI=1
HT_MCS=33
HT_MIMOPSMode=3
IEEE80211H=0
TGnWifiTest=0
WirelessEvent=0
CarrierDetect=0


And a netcfg profile

CONNECTION="wireless"
INTERFACE=ra0
SCAN="no"
SECURITY="wpa"
ESSID=mywirelessnetwork
KEY="mysecretkey"
IP="dhcp"
TIMEOUT=20
DHCP_TIMEOUT=30

No need to set the channel in the netcfg profile since the .dat file took care of it.

Troubleshooting

dmesg:Bulk In Failed, CMDTHREAD_RESET_BULK_IN, etc

Bulk In Failed messages are not so bad, but a problem arises when and if the failed data leads to CMDTHREAD_RESET_BULK_IN which results in the module removing itself (e.g. modprobe -r rt2870sta).

This probably happened because you created your own RT2870STA.dat file. Go into the rt2870 tarball directory, into the source code directory, and replace the RT2870STA.dat in /etc/Wireless/RT2870STA/ with the preconfigured .dat file in the 2008_0718_RT2870_Linux_STA_v1.3.1.0 directory. From there, set the options that correspond to your network without removing any of the options.

rt2870CmdThread is using a lot of CPU

I do not specifically know why this occurs, but it is probably because you connected your device to a hub.

Kernel 2.6.30 issues

There seem to be multiple issues with the rt2870 driver in the 2.6.30 kernel. Please refer to this thread

Kernel 2.6.31 module conflicts

The 2.6.31 kernel caused the rt2870 driver to conflict with other wireless modules. The fix in this thread says that you need to blacklist the rt2800usb, rt2x00usb, and rt2x00lib modules. See Kernel modules#Blacklisting for information about blacklisting kernel modules.

What next?

Insert the device and try connecting. See the Wireless Management section of Wireless Setup for details on connection methods.