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Are ROS2 namespaces fully supported by Matlab/simulink?

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Diego
Diego el 13 de Mayo de 2024
Respondida: Diego el 13 de Mayo de 2024
I'm currently working with ros2 nodes generated from simulink, and I need several instances of these nodes with different names running in the same network.
Using Humble, R2023b and Ubuntu 22.04 I don't need the workaround used in this previous question to launch each node.
However, the namespace is only applied to the node name, not to the topics.
Is it a bug? Or is this functionality still in development?
Just in case, I add the python launch file:
from launch import LaunchDescription
from launch_ros.actions import Node
from launch.actions import DeclareLaunchArgument
from launch.substitutions import LaunchConfiguration
def generate_launch_description():
# Declare the namespace launch argument
namespace = DeclareLaunchArgument(
'car_namespace',
default_value='kitt',
description='Namespace for the ROS2 node'
)
# Define the launch value for the namespace
namespace_arg = LaunchConfiguration('car_namespace')
# Launch the ROS2 node with the specified namespace, package, and executable
node = Node(
package='car_control_system',
executable='CAR_CONTROL_SYSTEM',
namespace=namespace_arg
)
return LaunchDescription([
namespace,
node
])

Respuesta aceptada

Diego
Diego el 13 de Mayo de 2024
I have the answer, and it happens the same in some other ros2 codes, like the ros_gz_bridge:
If you declare your topics starting by slash, they won't be affected by namespaces.
Now that I changed my topic names so that they do not start by slash, it works perfectly.

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