Mr Christian, I really appreciate your reply, it really helped and we're going to try it out. I just also wanted to ask if we could replace the laser range finder by embedding an algorithm that calculates the distance between the Robotino and the objects in front of it; mainly retrieved from the camera?? Would that be efficient? or do you think it would be and over kill in processing?? Mina Botros -- View this message in context: http://ros-users.122217.n3.nabble.com/ROS-API-on-Robotinos-tp2434065p2481039.html Sent from the ROS-Users mailing list archive at Nabble.com.