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How to troubleshoot Rviz2 not receiving map from cartographer?

asked 2021-10-09 15:13:37 -0500

fgfanta gravatar image

updated 2021-10-10 03:40:06 -0500

Rviz2 doesn't receive anymore Turtlebot 3 lidar readings, nor the map being built by cartographer. Cartographer makes the map allright, in fact I can have it saved in the end, and topics /scan and /map have messages going over them; still Rviz2 doesn't seem to receive them, nor display them. The same happens both with Gazebo and with a real Turtlebot.

Running Foxy under Ubuntu 20.04.

These are the commands I run (taken from the Turtlebot 3 e-manual). The setup.bash from /opt/ros/foxy and my workspace are already sourced in every shell I use, as well as TURTLEBOT3_MODEL is set to burger.

# Start gazebo
ros2 launch turtlebot3_gazebo

# Start cartographer and Rviz2
ros2 launch turtlebot3_cartographer use_sim_time:=True

# Start the teleoperation node
ros2 run turtlebot3_teleop teleop_keyboard

# Drive around and save the map
ros2 run nav2_map_server map_saver_cli -f ~/map

I am attaching a screenshot of Gazebo and Rviz2, and the output of Also pasting the output of Gazebo and Cartographer to console.

Anything I should try, or additional information I can collect to troubleshoot the issue?

[UPDATE] Since the problem occurred right after Foxy got updated during a round of sudo apt upgrade, I think the issue is likely related to this




Gazebo's output

Cartographer's output

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1 Answer

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answered 2021-10-09 19:02:03 -0500

vane gravatar image

I have encountered the same problem. My workspace consists of these repos, all on the head of foxy-devel branch: turtlebot3, turtlebot3_msgs, turtlebot3_simulations.

If I launch waffle_pi which has a camera, I can even see the camera output in rqt, but like yourself not in rviz (likewise no /scan). Incidentally, I also tried to install turtlebot3 and turtlebot3_msg via apt, and turtlebot3_simulations still from source, and with this setup rviz works. I did not managed to do more thorough tests yet.

I checked package.xml for apt installed turtlebot3 and it's 2.1.1, by the tags is 9 months behind, and the problem appeared probably in the commits since then.

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It might be related to this

fgfanta gravatar image fgfanta  ( 2021-10-10 03:38:13 -0500 )edit

Good find, the changes in turtlebot repos are minor, more likely a rviz issue. ROS was up to date in my first test (build from sources), and I actually used a docker image for the second test (apt binaries), which was not up to date, so that might explained why the likely older Rviz worked.

vane gravatar image vane  ( 2021-10-10 04:31:29 -0500 )edit

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Asked: 2021-10-09 15:13:37 -0500

Seen: 1,329 times

Last updated: Oct 10 '21