Hi Vinay, I have pioneer 2dx base platform. Robot does not have any computation platform with it! I am trying to communicate to it using Serial port for my workstation. So, I set both ROS_MASTER_URI and ROS_MASTER_IP to localhost. I believe both processes are running on same machine so this setting shall suffice. Am I wrong in doing so? I can echo topics batter_statur, sonar, motor_state, etc. About enabling motors to 1, i did press motor switch. It makes robo move about I believe it is some default behaviour. It moves 360 degree on each wheel alternatively. I will look into tutorial again and will reply if problem persists. Thanks and regards nitin -- View this message in context: http://ros-users.122217.n3.nabble.com/Re-Basic-navigation-for-pioneer-robot-using-p2os-tp971765p977886.html Sent from the ROS-Users mailing list archive at Nabble.com. ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ ros-users mailing list ros-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ros-users