No transform from [...] to [map]

I run: ros2 launch linorobot2_bringup bringup.launch.py ros2 run teleop_twist_keyboard teleop_twist_keyboard ros2 launch linorobot2_navigation slam.launch.py rviz:=true to slam, but I the transform wasn’t working. And rviz has a lot of errors displayed all related to transform.

I’m new to ROS2 and wasn’t able to Identify and fix the problems…

URDF looks ok and working:

Topic list:

/clicked_point
/cmd_vel
/diagnostics
/goal_pose
/imu/data
/initialpose
/joint_states
/map
/map_metadata
/map_updates
/odom
/odom/unfiltered
/parameter_events
/robot_description
/rosout
/scan
/set_pose
/slam_toolbox/feedback
/slam_toolbox/graph_visualization
/slam_toolbox/scan_visualization
/slam_toolbox/update
/tf
/tf_static

• System info System config: 2wd System: Jetson nano OS: Ubuntu 20.04 from Qengineering Base board: Teency 4.0 Lidar: Rplidar IMU: MPU-9250 Motor driver: L298N

[grassjelly]

Silly question, how about the /scan topic?

[EnderDragonEP]

Silly question, how about the /scan topic?

Thank you for the head-up! I have found the cause of the problem. I was thinking about where is the laser scan lines goes and I was checking the manual installation. I installed the Rplidar and Realsense drivers and add the environment variables to the .bashrc. Out of curiosity, I opened the .bashrc and I find that the LINOROBOT2_DEPTH_SENSOR and LINOROBOT2_LASER_SENSOR variables are not set.

After I eddit the .bashrc and run the command source ~/.bashrc. The issue was fixed! No more errors.

But seems like the Intel Realsense camera still have some issue. But that’s the problem for another day. 😭

Thank for you help and guidance!