View source for Overo Wifi

[[Category:How_to_-_wifi]]
[http://www.gumstix.com/store/catalog/product_info.php?cPath=31&products_id=226 Overo Air] and [http://www.gumstix.com/store/catalog/product_info.php?cPath=31&products_id=227 Overo Fire] COMs have a 802.11(g) wireless module "on board". This page gives some details about the hardware and software configuration for this Wifi module.

=Hardware=

This section gives some infos about various hardware related topics regarding Overo Wifi.

==Module==

Overo Wifi solution is based on an [http://www.wi2wi.com/wireless.php Wi2Wi chip] based on Marvell's industry leading 88W8686 which brings 802.11(b/g) wifi.

==MMC==

Overo fire's WiFi port connected to MMC port '''2''' in 4 bit configuration.

==Connector==

Wifi antenna has to be connected to '''J2''' (see [http://www.gumstix.net/Documentation/view/Overo-Setup-and-Programming/Getting-started/109.html picture WIFI ANT]) on Overo Air or Fire COMs.

Note: J3 is BlueTooth connector and can use same antenna.

==Antenna==

Gumstix' [http://www.gumstix.com/store/catalog/product_info.php?products_id=173 u.fl Antenna] is compatible to Overo Air and Fire connectors.

=Software=

Official Overo [http://www.gumstix.net/Setup-and-Programming/view/Overo-Setup-and-Programming/Downloading-pre-built-images/111.html pre-built Linux images] or [http://www.sakoman.com/feeds/omap3/glibc/images/overo/ developer images] contain already support for Overo Wifi. However, wifi configuration depending on your local wifi environment still has to be done.

==Boot messages==

At Overo boot, you should get something like

 ...
 libertas_sdio: Libertas SDIO driver
 libertas_sdio: Copyright Pierre Ossman
 libertas_sdio mmc1:0001:1: firmware: requesting sd8686_helper.bin
 libertas_sdio mmc1:0001:1: firmware: requesting sd8686.bin
 libertas: 00:19:88:05:b5:31, fw 9.70.3p24, cap 0x00000303
 libertas: PREP_CMD: command 0x00a3 failed: 2
 libertas: PREP_CMD: command 0x00a3 failed: 2
 libertas: eth0: Marvell WLAN 802.11 adapter 
 ...

Note: The two “command 0×00a3 failed” messages are harmless, and have to do with features that are not supported.

==Test==

For test of basic functionality, do the following at command line (after log in as root / no password):

 root@overo:~# '''iwconfig wlan0 essid any'''
 root@overo:~# '''ifconfig wlan0 up'''
 root@overo:~# '''iwlist wlan0 scan'''

what should list the wifi's visible, then.

==Unencypted wifi==

tbd.

==WEP encryption==

* Edit ''/etc/network/interfaces'' to have only for wlan0 (don't touch the other entries):

 iwconfig wlan0 essid "My Wireless Network"
 iwconfig wlan0 key my-hex-key
 ifdown wlan0
 ifup wlan0

==WPA encryption==

* Edit ''/etc/network/interfaces'' to have only for wlan0 (don't touch the other entries):

 allow-hotplug wlan0
 iface wlan0 inet dhcp
       pre-up wpa_supplicant -Dwext -iwlan0 -c/etc/wpa_supplicant.conf -B
       down killall wpa_supplicant

* Create ''/etc/wpa_supplicant.conf'' containing:

 ctrl_interface=/var/run/wpa_supplicant
 ctrl_interface_group=0
 eapol_version=1
 ap_scan=1
 fast_reauth=1
 
 network={
       ssid="add-your-ascii-ssid"
       proto=WPA2
       key_mgmt=WPA-PSK
       pairwise=CCMP TKIP
       group=CCMP TKIP
       scan_ssid=1
       psk="add-your-ascii-passphrase"
       priority=10
 } 

=Links=

* [http://bec-systems.com/site/387/wi2wi-wifi-bt-module-review Wi2Wi W2CBW003 Wifi/Bluetooth module review]