Programming for Robotics, Lecture 2: Your first ROS package

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The second lecture in the series 'Programming for Robotics', discusses ROS package structure; Integration and programming with Eclipse; ROS C++ client library (roscpp); ROS subscribers and publishers; ROS parameter server and RViz visualization
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A good resource for Eclipse with ROS, where the catkin project is compiled by command line and edited in Eclipse(Auto complete and function check). Start from 1:05:48

neoneo
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I'm having issues with the \scan topic not receiving any messages. rostopic echo /scan says "WARNING: no messages received and simulated time is active". As I result, I don't see any scan data on rviz even if I place some objects in front of the robot in Gazebo. However, the point cloud data works fine. Do you have any suggestions? Thank you.

jasajbalal