- rauwuckl/ros_simple_follower Get a Clue From the File Type - roslaunch robot-arm-control-ros simulate.launch; The Arduino can now see the joint_states topic and the data being published to it by the GUI thereby controlling the servos on the robot. In the last two steps instead of editing demo1.yaml and launching demo_panda.launch, edit demo_panda_all_planners.yaml and launch demo_panda_all_planners.launch. Add the following lines to this file: On the rqt, you can turn on the real-time monitoring on the topic /laser_front/scan.. And on the rviz, you can add built-in LaserScan display by topic and visualize /laser_front/scan in the 3D view port.. Summary. All the launch file does is start nodes and load parameters and such. Roslaunch will start roscore if one is not found. To start ROS core, use the "ROS: Start Core" command.The "ROS Core" indicator in the bottom left will show if the core is currently running, an… The launch file for mud_world.launch contains the following: