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Configuring WiFi from Command Line

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Contents

Special Note

BUG Software version 1.4.2 and above uses a graphical tool to configure wifi called connman. You may want to start there if you have a LCD Module. The following instructions should be used if for some reason connman does not meet your needs.

Overview

This page describes how to associate a BUG with Wifi module to an access point via a shell session. Note that this example assumes WPA-PSK type encrypted wifi networks. It the steps that follow don't apply to WEP, open, or hidden SSID networks.

Setting up wifi connection automatically

Step 1: Connect to BUG

Get to BUG command line, either with usb, serial, or some other network connection: 

ssh root@10.10.10.10
<enter>

Step 2: Verify network device

From session type iwconfig to confirm there is a network connection: 

# iwconfig

Step 3: Edit interfaces

Edit "/etc/network/interfaces" file and change "eth1" to look like the following: 

auto eth1
iface eth1 inet dhcp  
        wireless_mode managed            
        wireless_essid "MYSSID" 
        wpa-driver wext      
        wpa-conf /etc/myconf.conf


Step 4: creating a key

Create a key file that contains the AP name and key: 

# wpa_passphrase <essid> <pass> > /etc/myconf.conf

Step 5: stop/remove connman

You have some options here. You can either stop connman from starting at boot and trying to manage eth1 (but without uninstalling it entirely) with: 

# update-rc.d -f connman remove 
 update-rc.d: /etc/init.d/connman exists during rc.d purge (continuing)
 Removing any system startup links for connman ...
  /etc/rc0.d/K23connman
  /etc/rc1.d/K23connman
  /etc/rc2.d/S23connman
  /etc/rc3.d/S23connman
  /etc/rc4.d/S23connman
  /etc/rc5.d/S23connman
  /etc/rc6.d/K23connman

If you'd like to get rid of the daemon and GUI entirely, try: 

# ipkg remove --force-depends connman connman-gnome

Step 6: Reboot

Reboot so your network changes are picked up: 

# reboot


Step 7: confirming connection

At this point you should have a working wifi connection if the AP details are correct and the AP is working. You can verify this by either sshing into the the BUG via usb (ssh root@10.10.10.10) and pinging the AP: 

# ping <AP IP address>

or simply ssh into your BUG if you know it's ip: 

# ssh root@<ip_of_bug_on_wifi>
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