Monthly Archives: April 2012

DD-WRT on Linksys E2000

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These are the steps I took to flash a Linksys E2000 router with a DD-WRT firmware.

Background information

http://www.dd-wrt.com/wiki/index.php/Linksys_E2000
http://www.dd-wrt.com/wiki/index.php/Installation

Steps Taken

– 30/30/30 Reset
– Upload dd-wrt.v24-18024_NEWD-2_K2.6_mini-e2000.bin via Linksys firmware upgrade page from ftp://ftp.dd-wrt.com/others/eko/BrainSlayer-V24-preSP2/2011/12-20-11-r18024/broadcom_K26/
– Wait 5 minutes after upload completed.
– Web interface for DD WRT appears.
– Do a 30/30/30 reset again.
– Wireless > Advanced Settings enter 50 in the Tx Power entry. This should make for less Tx/Rx Errors and help the unit run cooler.

General:

– Initital DD WRT firmware flash must be a trailed build. A trailed build has “*e2000.bin” in its name. Following flashes must have “*e2k-e3k.bin” in their name.

Debug a Junit Ant Task from Eclipse

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Sometimes you run into a test that works when run from within Eclipse but not from the command line. To debug the failing test from Eclipse, you can configure the Junit ant task to accept remote debugging sessions.

This can be done by adding the following lines to the junit task:

<junit fork="true">
		
		<!-- For remote debugging from Eclipse -->
		<jvmarg value="-Xdebug" />
		<jvmarg value="-Xnoagent" />
		<jvmarg value="-Djava.compiler=NONE" />
		<jvmarg 
value="-Xrunjdwp:transport=dt_socket,address=8787,server=y,suspend=y" />

This will make the task wait for an incoming debug connection on port 8787. It is necessary to have the fork attribute on the junit task set to true, because the jvmarg values can only be given to a starting Java virtual machine.