Don't see the robot move..**Exercise 4.2**

roslaunch unit_4_services start_bb8_move_in_circle_service_server.launch
all seems to be ok,
i did catkin)make and souecw devel/setaup.bash…
no error massage,
but the robot is not moving…

Hello @giladgberg,

If the robot is not moving it’s very likely that it is because you are not publishing the correct commands to the /cmd_vel topic. So start by debugging this issue and try to make sure that you publish to this topic.