Overo Wifi

2010-02-04T05:43:04Z

Info128: added to Issues section: power management

[[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 and Antenna==

For 802.11b/g (Wifi) to work on an Overo Air COM or Overo Fire COM, a [http://www.gumstix.com/store/catalog/product_info.php?products_id=173 u.fl antenna] must be connected to '''J2''' on Overo Air or Fire COMs. The location of J2 is shown [http://www.gumstix.net/wiki/images/3/34/J2-J3.jpg here].

Note: J3 is the antenna location when using BlueTooth. J3 also takes a [http://www.gumstix.com/store/catalog/product_info.php?products_id=173 u.fl antenna].

Note that two (2) u.fl antennae come with each Overo Fire COM and with each Overo Air COM.

=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==

Some default builds do not enable any Wifi. You may need to edit /etc/network/interfaces to include a section which looks like:
<pre>
allow-hotplug wlan0
auto wlan0
iface wlan0 inet dhcp
pre-up /sbin/iwconfig wlan0 essid any
wireless_mode managed
</pre>
The problem is this setup is not reliable! we're waiting for a solution.

==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
}

=Issues=

Many users have reported issues with wifi data throughput being [http://old.nabble.com/Overo-wifi-speed-and-WPA2-connection-issue-td27196711.html#a27231874 limited to about 100kB/second]. It is theorized this is due to lack of SDIO IRQ support in the OMAP3 MMC driver. A patch is being investigated which reportedly [http://marc.info/?l=linux-omap&m=126140067103975&w=2 achieves 13Mbps].

Additionally, the driver does not support power management at present. The use of iwconfig power commands such as the following will fail:
<pre>
iwconfig wlan0 power on
</pre>
Therefore, the wifi module always consumes close to 1 Watt of power when turned on.

=Links=

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

Overo Wifi

2010-02-04T02:04:21Z

Info128: Added "Issues" section, summarizing wifi data throughput issue.

[[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 and Antenna==

For 802.11b/g (Wifi) to work on an Overo Air COM or Overo Fire COM, a [http://www.gumstix.com/store/catalog/product_info.php?products_id=173 u.fl antenna] must be connected to '''J2''' on Overo Air or Fire COMs. The location of J2 is shown [http://www.gumstix.net/wiki/images/3/34/J2-J3.jpg here].

Note: J3 is the antenna location when using BlueTooth. J3 also takes a [http://www.gumstix.com/store/catalog/product_info.php?products_id=173 u.fl antenna].

Note that two (2) u.fl antennae come with each Overo Fire COM and with each Overo Air COM.

=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==

Some default builds do not enable any Wifi. You may need to edit /etc/network/interfaces to include a section which looks like:
<pre>
allow-hotplug wlan0
auto wlan0
iface wlan0 inet dhcp
pre-up /sbin/iwconfig wlan0 essid any
wireless_mode managed
</pre>
The problem is this setup is not reliable! we're waiting for a solution.

==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
}

=Issues=

Many users have reported issues with wifi data throughput being [http://old.nabble.com/Overo-wifi-speed-and-WPA2-connection-issue-td27196711.html#a27231874 limited to about 100kB/second]. It is theorized this is due to lack of SDIO IRQ support in the OMAP3 MMC driver. A patch is being investigated which reportedly [http://marc.info/?l=linux-omap&m=126140067103975&w=2 achieves 13Mbps].

=Links=

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

Gumstix User Wiki - User contributions [en]

Overo Wifi

Overo Wifi