Can not visualize laser_scan in rviz2 when i try to follow the tutorial_ros2_sensors

Omniverse Isaac Sim
1

In the fixed frame of rviz2, there is no “turtle” to be chosen.And,when i add the topic “laser_scan”,there was the error like the picture below.Need help!!!

Screenshot from 2023-08-01 15-47-08
Screenshot from 2023-08-01 15-47-081919×951 191 KB

2

Hi @gaozhao22 - Here are a few things that could potentially cause this issue:

  1. Incorrect Topic: Make sure that the topic you’re trying to visualize in RViz2 matches the topic that the laser scan data is being published on. In the tutorial, the data should be published on the /scan topic.
  2. Incorrect Frame: In RViz2, you need to set the correct fixed frame to visualize the data. The tutorial suggests setting the fixed frame to ‘sim_lidar’.
  3. ROS2 Bridge: Make sure that the ROS2 bridge in Isaac Sim is enabled and working correctly. The bridge is necessary for Isaac Sim to communicate with ROS2.
  4. Network Issues: If you’re running Isaac Sim and RViz2 on different machines, there could be network issues preventing the data from being received. Make sure that the machines are on the same network and that there are no firewall rules blocking the communication.