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Update nr3 (Feb25,2015) video added of one of the first attempts to drive a straight line of 150 cm,, with on-route calibration. Update nr 2 (Feb 24, 2015) I now managed to get all base components working in Java. I am now using Java SE with the jdk.dio libraries which form the basis of the GPIO capabilities in Java ME (and are available separately), so I am also using my original Java ME code again, not the PI4J based code. I only use PI4J to access the WiringPi functions for PWM motor ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/search-and-rescue-robot