RPLIDAR A1M8 suddenly stopped sending valid measurements

[jliang1-cloud]

Robot Model

Turtlebot4 Standard

ROS distro

Jazzy

Networking Configuration

I do not know

OS

Ubuntu 24.04

Built from source or installed?

Installed

Package version

Package: ros-jazzy-desktop
Status: install ok installed
Priority: optional
Section: misc
Installed-Size: 45
Maintainer: Geoffrey Biggs geoff@openrobotics.org
Architecture: amd64
Version: 0.11.0-1noble.20260412.072512
Depends: ros-jazzy-action-tutorials-cpp, ros-jazzy-action-tutorials-interfaces, ros-jazzy-action-tutorials-py, ros-jazzy-angles, ros-jazzy-composition, ros-jazzy-demo-nodes-cpp, ros-jazzy-demo-nodes-cpp-native, ros-jazzy-demo-nodes-py, ros-jazzy-depthimage-to-laserscan, ros-jazzy-dummy-map-server, ros-jazzy-dummy-robot-bringup, ros-jazzy-dummy-sensors, ros-jazzy-examples-rclcpp-minimal-action-client, ros-jazzy-examples-rclcpp-minimal-action-server, ros-jazzy-examples-rclcpp-minimal-client, ros-jazzy-examples-rclcpp-minimal-composition, ros-jazzy-examples-rclcpp-minimal-publisher, ros-jazzy-examples-rclcpp-minimal-service, ros-jazzy-examples-rclcpp-minimal-subscriber, ros-jazzy-examples-rclcpp-minimal-timer, ros-jazzy-examples-rclcpp-multithreaded-executor, ros-jazzy-examples-rclpy-executors, ros-jazzy-examples-rclpy-minimal-action-client, ros-jazzy-examples-rclpy-minimal-action-server, ros-jazzy-examples-rclpy-minimal-client, ros-jazzy-examples-rclpy-minimal-publisher, ros-jazzy-examples-rclpy-minimal-service, ros-jazzy-examples-rclpy-minimal-subscriber, ros-jazzy-image-tools, ros-jazzy-intra-process-demo, ros-jazzy-joy, ros-jazzy-lifecycle, ros-jazzy-logging-demo, ros-jazzy-pcl-conversions, ros-jazzy-pendulum-control, ros-jazzy-pendulum-msgs, ros-jazzy-quality-of-service-demo-cpp, ros-jazzy-quality-of-service-demo-py, ros-jazzy-ros-base, ros-jazzy-rqt-common-plugins, ros-jazzy-rviz-default-plugins, ros-jazzy-rviz2, ros-jazzy-teleop-twist-joy, ros-jazzy-teleop-twist-keyboard, ros-jazzy-tlsf, ros-jazzy-tlsf-cpp, ros-jazzy-topic-monitor, ros-jazzy-turtlesim, ros-jazzy-ros-workspace
Description: A package which extends 'ros_base' and includes high level packages like vizualization tools and demos.

Type of issue

LIDAR

Expected behaviour

When I run ros2 topic echo /scan, the ranges and intensities should change when I put my hand in front of the LIDAR scanner

Actual behaviour

When I run ros2 topic echo /scan, all of the ranges are .inf and all of the intensities are 0.0, they do not change when I put something in front of the sensor

Error messages

To Reproduce

When the motor head is spinning, type in ros2 topic echo /scan

Other notes

There are no error messages, ros2 topic hz /scan shows that messages are being published around 7 to 8 times a second, ls -l /dev/RPLIDAR is able to find the device, and the motor is still spinning. I can't see a laser light shining out from the head, unplugging and replugging the USB cord to the LIDAR unit did not change anything. Logs show that the health is status 0

[smatarCPR]

Hello @jliang1-cloud
Thank you for reaching out on the Turtlebot 4 Github page. I am very sorry to hear that your unit is not meeting expectations. I wanted to double check if this was the same unit that is currently being handled by our Clearpath Support team in an open thread.

Looking forward to hearing from you soon.
Best Regards,
Saif M.

[jliang1-cloud]

Hi @smatarCPR,

Thank you for the reply! Yes, this is the same unit being currently handled by Clearpath Support.

Jeffrey