Roslaunch

Using roslaunch command

Usage:

roslaunch [package] [filename.launch]

First go to the techx2019 package we created and built earlier:

roscd techx2019

Create a launch directory:

mkdir launch
cd launch

The Launch File

Now let’s create a launch file called turtlemimic.launch

touch turtlemimic.launch
gedit turtlemimic.launch

Paste the following:

<launch>

<group ns="turtlesim">

    <node pkg="turtlesim" name="turtle1" type="turtlesim_node"/>
    <node pkg="turtlesim" name="turtle2" type="turtlesim_node"/>
    <node pkg="techx2019" name="talker" type="talker.py" output="screen"/>

</group>

</launch>

Run the launch file:

roslaunch techx2019 turtlemimic.launch