0. My environment- Ubuntu 18.04- ROS melodic 1. git clone rplidar source$ cd catkin_ws/src$ git clone https://github.com/Slamtec/rplidar_ros$ cd ..$ catkin_make2. source bash$ source ~/catkin_ws/devel/setup.bash3. Get permision USB$ ls /dev/ttyUSB*$ sudo chmod 0666 /dev/ttyUSB04. Test$ roslaunch rplidar_ros view_rplidar.launch Reference:https://github.com/Slamtec/rplidar_ros GitHub - Slamtec/rpl..