.zero's profile - activity

Hello there,

I am unable to import tf2_geometry_msgs as an python3 module in ros2 eloquent. Only tf2_ros, tf2_py and tf2_msgs seem to be a python module. I am porting an melodic project to eloquent and we used the comfortable do_transform_vector3 function of that script. Someone else seems to have a similar issue with c++: link (Maybe its completely unrelated though)

Am I missing something here?

ros2 import tf2_geometry_msgs Hello there, I am unable to import tf2_geometry_msgs as an python3 module in ros2 eloq

Hello there,

I am trying to port an old melodic project to eloquent and was wondering on how to concatenate strings to an launch argument like so:

return LaunchDescription([
    DeclareLaunchArgument('id', default_value='75', description="an id"),
    DeclareLaunchArgument('target', default_value="robot_"+launch.substitutions.LaunchConfiguration('id')+"/target"),
    Node(
        package='wand_control',
        node_executable='wand_control',
        output='screen',
        node_name="wand_control",
        node_namespace="aq_"+launch.substitutions.LaunchConfiguration("id"),
        parameters=[{
            "target" : launch.substitutions.LaunchConfiguration('target')
        }]
    )
])

but there is an error on the line where I am trying to set the launch argument 'target':

must be str, not LaunchConfiguration

Is there a way to achieve that?

Thank you! But why does it work that way?

ros2 concatenate string to launchargument Hello there, I am trying to port an old melodic project to eloquent and was

ros2 concatenate string to launchargument Hello there, I am trying to port an old melodic project to eloquent and was

Hello,

Is there (already) a way in Ros 2 to remap services in a launch file? For example: If my service is on '/service' and my client-node is in a namespace called 'a' and therefore tries to connect to '/a/service'.

Ros 2 remap services Hello, Is there (already) a way in Ros 2 to remap services in a launch file? For example: If my se

Hello,

I started having a look at Ros 2 (crystal) two weeks ago and really had a hard time creating a package that produces some executables. As I managed to do that I tried to migrate some old code to Ros 2 code. It was just a tiny project which moved a frame in a circel around the world-frame's center in rviz. To do that I used the TransformBroadcaster imported from tf. I saw that there is now tf2 in my rosdistro/share, so I tried to import that with import tf2, but this threw a

ModuleNotFoundError: No module named 'tf2'

The weird thing is, I can import TFMessage from tf2_msgs and publish TFMessages to tf 'by hand'. This really feels like I overlooked something trivial but as I didn't find anything so far I wanted to ask here.

Ros 2 import tf2 Python Hello, I started having a look at Ros 2 (crystal) two weeks ago and really had a hard time crea