simple_mapper simulation

[mahi98drone]

Hi :)
I am working on the Crazyflie ROS 2 mapping demo using crazyflie_ros2_multiranger_simple_mapper on ROS 2 Humble with Gazebo. However, I am facing multiple issues. In RViz, I get the error "Frame [map] does not exist", and the /crazyflie/map topic is not updating. Additionally, the simple_mapper node is missing when I run ros2 node list. I have tried rebuilding the package (colcon build), installing dependencies (rosdep install), sourcing the workspace, and even cleaning and rebuilding everything, but the issue persists. The build process completes, but with stderr output for multiple packages, and I’m unsure if these warnings are critical. How can I fix the missing simple_mapper node and get the map frame to appear in RViz? Any help would be appreciated! It is an emergency :(

[gemenerik]

Hi. I’ll do my best to help. First, could you clarify where the crazyflie_ros2_multiranger_simple_mapper package comes from? Is it something maintained by Bitcraze, or is it from another source? That would help determine if the issue is related to our software or something else. Regarding your issue, could you share the logs, especially any critical errors or warnings during the build and runtime? That might help pinpoint the problem.

[mahi98drone]

Hello Thank you so much for your response! I really need help. 😊

First, it is the crazyflie_ros2_multiranger_simple_mapper from Bitcraze. I am following this instruction exactly: https://www.bitcraze.io/tag/mapping/.

You can find the runtime errors I get in the picture I have attached.

[gemenerik]

It’s a bummer that something broke so soon after the demo, especially since you followed the steps exactly. Unfortunately, this was just a one-time project that Kimberly worked on, and it’s not something we maintain as a company. Since Kimberly has since left, we don’t have direct support for it, but I’ll do my best to give you some pointers.

Are you running it on exactly the same OS? Even if you are, updates might have introduced changes that break things. From what I can see, the issue seems to be related to Numpy—this program uses numpy.float, which has been deprecated in more recent versions. That might be a good place to start troubleshooting.

Also, if you can copy your terminal output directly here in the future, it’ll make it much easier to read and debug. Hope this helps!