How to solve it ? [ldlidar_stl_ros2_node-1] [ERROR] [1698204279.082635882] [STL27L]: ldlidar communication is abnormal.

[wuh15]

ros2 launch ldlidar_stl_ros2 stl27l.launch.py [INFO] [launch]: All log files can be found below /home/xiaoyu/.ros/log/2023-10-25-11-24-36-000859-patrick-Precision-3460-2064107 [INFO] [launch]: Default logging verbosity is set to INFO [INFO] [ldlidar_stl_ros2_node-1]: process started with pid [2064108] [INFO] [static_transform_publisher-2]: process started with pid [2064110] [static_transform_publisher-2] [WARN] [1698204276.075204599] []: Old-style arguments are deprecated; see --help for new-style arguments [ldlidar_stl_ros2_node-1] [INFO] [1698204276.081212779] [STL27L]: LDLiDAR SDK Pack Version is: v3.0.3 [ldlidar_stl_ros2_node-1] [INFO] [1698204276.081251821] [STL27L]: <product_name>: LDLiDAR_STL27L [ldlidar_stl_ros2_node-1] [INFO] [1698204276.081256446] [STL27L]: <topic_name>: scan [ldlidar_stl_ros2_node-1] [INFO] [1698204276.081259139] [STL27L]: <frame_id>: base_laser [ldlidar_stl_ros2_node-1] [INFO] [1698204276.081261491] [STL27L]: <port_name>: /dev/ttyUSB0 [ldlidar_stl_ros2_node-1] [INFO] [1698204276.081263903] [STL27L]: <port_baudrate>: 921600 [ldlidar_stl_ros2_node-1] [INFO] [1698204276.081266528] [STL27L]: <laser_scan_dir>: Clockwise [ldlidar_stl_ros2_node-1] [INFO] [1698204276.081269025] [STL27L]: <enable_angle_crop_func>: false [ldlidar_stl_ros2_node-1] [INFO] [1698204276.081272418] [STL27L]: <angle_crop_min>: 0.000000 [ldlidar_stl_ros2_node-1] [INFO] [1698204276.081277139] [STL27L]: <angle_crop_max>: 0.000000 [ldlidar_stl_ros2_node-1] [INFO] [1698204276.081681053] [STL27L]: ldlidar node start is success [static_transform_publisher-2] [INFO] [1698204276.082988739] [base_link_to_base_laser_stl27l]: Spinning until stopped - publishing transform [static_transform_publisher-2] translation: ('0.000000', '0.000000', '0.180000') [static_transform_publisher-2] rotation: ('0.000000', '0.000000', '0.000000', '1.000000') [static_transform_publisher-2] from 'base_link' to 'base_laser' [ldlidar_stl_ros2_node-1] [ERROR] [1698204279.082635882] [STL27L]: ldlidar communication is abnormal. [ldlidar_stl_ros2_node-1] [LDS][INFO][1698204276.81653920][Actual BaudRate reported:921600] [ERROR] [ldlidar_stl_ros2_node-1]: process has died [pid 2064108, exit code 1, cmd '/home/xiaoyu/workspace/ldlidar_ros2_ws/install/ldlidar_stl_ros2/lib/ldlidar_stl_ros2/ldlidar_stl_ros2_node --ros-args -r __node:=STL27L --params-file /tmp/launch_params_w2dldkmu --params-file /tmp/launch_params_1tk6ghqz --params-file /tmp/launch_params_vnkcsfmv --params-file /tmp/launch_params_8pmzdaea --params-file /tmp/launch_params__l1tj9su --params-file /tmp/launch_params_hp4ukfam --params-file /tmp/launch_params_9sa_mjlg --params-file /tmp/launch_params_3dojh6ll --params-file /tmp/launch_params__xdmxevb'].