ROS2 system debug techniques
Hi,
I'm trying to connect an IMX6 module with ROS2 with a linux PC. The communication using ROS2 somehow does not work, but I am also unable to figure out what the root cause is. What are the right places to start looking? Which logfiles could I inspect, or what settings can I change such that the debugging output is increased?
Is there a way to get more information from the fastrtps library?
I checked this page (https://index.ros.org/doc/ros2/Troubl...) but it does not contain hints about where to get more detailed logging.
Regards, Windel
I would suggest to look for information on how to diagnose DDS communication issues. I've seen quite a few issues and questions about that layer of the stack.
That would be independent of the ROS 2 integration.
RTI has the DDS Spy fi that you could use for this.
Thank you for this tip! Is this a free utility, or is it commercial software?
I'm not sure whether it's part of the free/community distribution. You'd have to check.
Note thought that if you have
ros2 topic listetc working (as you mention in #q301862) then I'm guessing that basic communication does work, so it may not be a (pure) DDS issue any more.I'm assuming now that it is a ros2 version incompatibility. On my windows PC I have ROS2 dashing. On my imx6 board I have the version as in the bmwcarit meta-ros layer, which is pretty outdated. I am able to see the nodes with
ros node list, butros topic listdoes not give any results.Ah, ok.
Yes, that would probably be a problem.
It would be good to mention these kinds of details in your initial posting.