I'm installing a Angstrom (custom build, not the default build) on a Beagleboard XM.I can scan for wireless networks using iwlist and see the neighborhood wireless devices.I have set my SSID and Key (a 10-digit hex code using lowercase) in /etc/network/interfacesWhen I do a ifup wlan0, it goes through the process of DHCPDISCOVER and then says No DHCPOFFERS received.The device is an Alfa USB with a Realtek rtl8187 chipset. (which works fine when used under Debian on my laptop).Why isn't my SSID displayed properly under iwconfig, and why won't the interface get an IP via DHCP?
Why is my wlan0 interface on Angstrom (Beagleboard) Not Associated?
linux;wifi;embedded;angstrom;wlan
Thanks to @slm for sending me to the how-to reference.  It appears the biggest issue was that NetworkManager was running and because I have no GUI (the BeagleBoard version of nmcli does not have the connect feature allowing for the creating of new interfaces on the command-line, and I am only connecting to the beagleboard via a serial port (no GUI)) I had no means to setup new connections.  Further, NetworkManager may have been killing connections which I was finally able to see proof of in /var/log/syslog.So the solution was to prevent NetworkManager from running and run and setup manually the necessary configuration for wpa_supplicant.  With wpa_supplicant running and NetworkManager not running (and bringing the interface up/down several times) I was finally able to get a DHCP assigned, and the Internet is now reachable through a wireless connection on the Beagleboard.I'll have to continue to fiddle and experiment to ensure this connection comes up smoothly at boot-time (and to ensure that the Ethernet port will continue to work) but at least I've overcome the immediate road-block.