Action example

[ArjanVroegop]

Hi,

Great work on rclUE, I'm really impressed by how well ROS2 is integrated in Unreal Engine.

I have a question about the ROS2ActionExamples. If I open this level, everything works fine within UE. However, I have some issues talking to an action server from ROS2.

To reproduce:

• Open the ROS2ActionExamples level
• Delete everything except BP_ROS2ActionServerNode
• Play the level

From a terminal, with ROS2 sourced, ros2 action list shows /bp/fibonacci. So the action server seems to be there.
However, with the command ros2 action send_goal /bp/fibonacci example_interfaces/action/Fibonacci "{}" I only get this output: Waiting for an action server to become available...
Could this be a bug in the ActionServer or am I doing something wrong?

*edit: Using Ubuntu 22.04, UE5.3 and rclUE is on devel branch

[yuokamoto]

Let me check.

[yuokamoto]

I can reproduce issue. I will keep debugging but currently no clue...

[ArjanVroegop]

Hi yuokamoto, thanks for looking into this. Is there anything I can do to help you to find the problem?

[yuokamoto]

Thank you. I spent a time to investigate but can't find clue yet. Since it is ROS 2 communication issue, it may need to check deep inside.