Herman Ye

I unplugged the lidar then replugged it, and confirmed that the device number mounted on Ubuntu is /dev/ttyUSB0. ``` Operation: ls -l /dev/tty* Results: crw-rw-rw- 1 root tty 5, 0...

For q1: `message;severity;node;stamp;location "ldlidar communication is abnormal.";"40";"LD06";"1678359932.993650353";"/home/mangdang/ldlidar_ros2_ws/src/ldlidar_stl_ros2/src/demo.cpp:main:103" "ldlidar node start is success";"20";"LD06";"1678359929.993229826";"/home/mangdang/ldlidar_ros2_ws/src/ldlidar_stl_ros2/src/demo.cpp:main:94" ": 225.000000";"20";"LD06";"1678359929.992244253";"/home/mangdang/ldlidar_ros2_ws/src/ldlidar_stl_ros2/src/demo.cpp:main:78" ": 135.000000";"20";"LD06";"1678359929.992235376";"/home/mangdang/ldlidar_ros2_ws/src/ldlidar_stl_ros2/src/demo.cpp:main:77" ": false";"20";"LD06";"1678359929.992230680";"/home/mangdang/ldlidar_ros2_ws/src/ldlidar_stl_ros2/src/demo.cpp:main:76" ": Counterclockwise";"20";"LD06";"1678359929.992225667";"/home/mangdang/ldlidar_ros2_ws/src/ldlidar_stl_ros2/src/demo.cpp:main:75" ": 230400";"20";"LD06";"1678359929.992220810";"/home/mangdang/ldlidar_ros2_ws/src/ldlidar_stl_ros2/src/demo.cpp:main:74" ": /dev/ttyUSB0";"20";"LD06";"1678359929.992215880";"/home/mangdang/ldlidar_ros2_ws/src/ldlidar_stl_ros2/src/demo.cpp:main:73" ": base_laser";"20";"LD06";"1678359929.992211021";"/home/mangdang/ldlidar_ros2_ws/src/ldlidar_stl_ros2/src/demo.cpp:main:72" ": scan";"20";"LD06";"1678359929.992205471";"/home/mangdang/ldlidar_ros2_ws/src/ldlidar_stl_ros2/src/demo.cpp:main:71" ": LDLiDAR_LD06";"20";"LD06";"1678359929.992195784";"/home/mangdang/ldlidar_ros2_ws/src/ldlidar_stl_ros2/src/demo.cpp:main:70"...

Curobo seems to only support triangular mesh formats and does not support quadrilateral faces.