roslaunch launching not in one package

edit

Hi,

after long time I followed the tutorials again and tried a lauch file

<launch>

    <group ns="turtlesim1">
            <node pkg="turtlesim" name="sim" type="turtlesim_node"/>
    </group>

    <node pkg="turtlesim" name="mimic" type="mimic">
            <remap from="input" to="turtlesim1/turtle1"/>
            <remap from="output" to="turtlesim2/turtle1"/>
    </node>
    <node pkg="turtlesim" type="turtle_teleop_key" name="turtle_teleop_key"  output="screen">
            <param name="scale_linear" value="0.5" type="double"/>
            <param name="scale_angular" value="1.5" type="double"/>
            <remap from="turtlebot_teleop_keyboard/cmd_vel" to="cmd_vel_mux/input/teleop"/>
    </node>

</launch>

however the teleop is not working with the turtlesim

how would I correctly use teleop_key in a launchfile so that it work with the turtlesim ?

Thanks for any hint/link to the correct tutorial Regards, RL

Edit: Remapping is only for names ? only makes sense with long names ? is there any way to reuse the turtle_teleop_key in another package/ with another topic ?

this worked for me

<launch>
<group ns="turtlesim1">
        <node pkg="turtlesim" type="turtlesim_node" name="sim"/>
    <node pkg="turtlesim" type="turtle_teleop_key" name="turtle_teleop_key" output="screen">
            <param name="scale_linear" value="0.5" type="double"/>
            <param name="scale_angular" value="1.5" type="double"/>
    </node> 
</group>
</launch>

thanks and regards