DART-6UL/VAR-SOM-MX7 Wireless LAN: Difference between revisions

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= Access Point =
= Access Point =
This example will demonstrate you how to use the DART-6UL as an access point. It will forward packets from wlan0 to eth0.
This example will demonstrate you how to use the board as an access point. It will forward packets from wlan0 to eth0.
DHCPD:
DHCPD:
<pre>$ vi /etc/udhcpd.conf  
<pre>$ vi /etc/udhcpd.conf  
Line 64: Line 64:
<pre>$ vi /etc/hostapd.conf
<pre>$ vi /etc/hostapd.conf
change to:
change to:
ssid=DART-6UL_AP
ssid=VARI_AP
wpa=1
wpa=1
wpa_passphrase=12345678
wpa_passphrase=12345678

Revision as of 11:16, 1 December 2016

DART-6UL/VAR-SOM-MX7 Wireless LAN

Test

Scan for wireless networks:

$ ifconfig wlan0 up
$ iw dev wlan0 scan | grep SSID


Connecting to a WPA encrypted network:
Find your network from the above scan command.

$ mv /etc/wpa_supplicant.conf /etc/wpa_supplicant.conf.org
$ wpa_passphrase <YourAP> <YourPassword> >/etc/wpa_supplicant.conf
$ wpa_supplicant -B -Dnl80211 -iwlan0 -c/etc/wpa_supplicant.conf

Check link:

$ iw dev wlan0 link

Disable eth0:

$ ifconfig eth0 down
$ ifconfig eth1 down

Run DHCP:

$ udhcpc -iwlan0
$ ifconfig

Check link speed:
iperf server (on Target/Host):

$ ifconfig  (to get the IP address)
$ iperf -s

iperf client (on Host/Target):

$ iperf -c <IP_ADDRESS_OF_IPERF_SERVER>


Useful link for common iw commands: https://wiki.archlinux.org/index.php/Wireless_network_configuration#Manual_setup

Access Point

This example will demonstrate you how to use the board as an access point. It will forward packets from wlan0 to eth0. DHCPD:

$ vi /etc/udhcpd.conf 
# Sample udhcpd configuration file (/etc/udhcpd.conf)
# The start and end of the IP lease block
start           192.168.5.20    #default: 192.168.0.20
end             192.168.5.25    #default: 192.168.0.254
# The interface that udhcpd will use
interface   wlan0               #default: eth0
#Example
opt     dns     8.8.8.8  8.8.4.4 # public google dns servers
option  subnet  255.255.255.0
opt     router  192.168.5.1
option  lease   864000          # 10 days of seconds

This is a network example. You need to set the IP address based on your network.

Wireless configuration can be setup in file /etc/hostapd.conf before launching hostapd for configuring access point name, requiring password etc.
for example:

$ vi /etc/hostapd.conf
change to:
ssid=VARI_AP
wpa=1
wpa_passphrase=12345678
wpa_key_mgmt=WPA-PSK

Ensure that wpa_supplicant is not holding the device

$ killall wpa_supplicant
$ killall hostapd

IP Forwarding:

$ echo 1 > /proc/sys/net/ipv4/ip_forward
$ ifconfig wlan0 192.168.5.1
$ hostapd -B /etc/hostapd.conf -P /var/run/hostapd.pid
$ udhcpd /etc/udhcpd.conf
$ iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

As a next step one should take a look at iw utility which can be used for configuring some parameters https://wireless.wiki.kernel.org/en/users/documentation/iw