error, operation time out. SL_RESULT_OPERATION_TIMEOUT!

[HYEON073]

I'm using the Humble version for ros2. I installed rplidar in the sbc workspace through the command below.

sudo apt install ros-humble-rplidar-ros

In the foxy version, lidar worked well, but the error log appears as the operating time out error occurs, which I would have used by changing the version to humble.

I referred to it. https://github.com/Slamtec/rplidar_ros/issues/63 https://github.com/Slamtec/rplidar_ros/issues/5

I've tried changing the cable here and I've tried changing the built rate. (I'm currently using 256000.) I gave chmod 666 and 777 and tried using lidar nodes. But it all comes up with an operation timeout. How do I fix it?

Below is the rplidar node code. `

  import os

  from launch import LaunchDescription

  from launch_ros.actions import Node

  def generate_launch_description():

    return LaunchDescription([

    Node(
        package='rplidar_ros',
        executable='rplidar_composition',
        output='screen',
        parameters=[{
            'serial_port': '/dev/serial/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.3:1.0-port0',
            'frame_id': 'laser_frame',
            'angle_compensate': True,
            'scan_mode': 'Standard'
        }]
    )
])`

ros2 run rplidar_ros rplidar_composition --ros-args -p serial_port:=/dev/ttyUSB0 -p frame_id:=lidar_link -p angle_compensate:=true -p scan_mode:=Standard

`[INFO] [1704785243.525071991] [rplidar_node]: RPLidar running on ROS2 package rplidar_ros. RPLIDAR SDK Version:2.0.0 [ERROR] [1704785247.587766150] [rplidar_node]: Error, operation time out. SL_RESULT_OPERATION_TIMEOUT! [ros2run]: Process exited with failure 255 robot@robot-desktop:~/robot_ws$ ls -l /dev/ttyUSB* crw-rw-rw-+ 1 root dialout 188, 0 Jan 9 16:27 /dev/ttyUSB0 crw-rw----+ 1 root dialout 188, 1 Jan 9 16:28 /dev/ttyUSB1 robot@robot-desktop:~/robot_ws$ sudo chmod 666 /dev/ttyUSB0 [sudo] password for robot: robot@robot-desktop:~/robot_ws$ ros2 run rplidar_ros rplidar_composition --ros-args -p serial_port:=/dev/ttyUSB0 -p frame_id:=lidar_link -p angle_compensate:=true -p scan_mode:=Standard [INFO] [1704785425.028944733] [rplidar_node]: RPLidar running on ROS2 package rplidar_ros. RPLIDAR SDK Version:2.0.0 [ERROR] [1704785429.084461004] [rplidar_node]: Error, operation time out. SL_RESULT_OPERATION_TIMEOUT! [ros2run]: Process exited with failure 255

`

[Spirquel]

(my english bad, sorry) i have the same problem; my solution isn't in the rplidar_ros package. for me the problem is in the launch file to my package which use for launch my rplidar. in this package i have a rplidar_node.yaml this : "/**: rplidar_node: ros__parameters: angle_compensate: true channel_type: serial flip_x_axis: false frame_id: laser_frame inverted: false scan_mode: '' serial_baudrate: 256000 serial_port: /dev/ttyUSB0 topic_name: scan use_sim_time: false

  # True turns off lidar motor when scan topic is not subscribed to. 
  # False runs lidar motor constantly. 
  auto_standby: true"

but my code search the "rplidar_composition" so i change in this file "rplidar_node" by "rplidar_composition" and my code work. i hope this comment help you; my package for launch my rplidar is here : https://github.com/iRobotEducation/create3_examples/tree/humble/create3_lidar_slam the problem is so the node execution and this name.