How to control the Pioneer2dx model in Gazebo using ROS?

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As far as I know, running Gazebo with ROS is little more complicated. I have seen the projects generarly organized into 3 packages

- robot_description
- robot_gazebo
- robot_control

You would put your URDF robot description into the robot_description package.

Definition of the gazebo world and launching files would be inside robot_gazebo package.

And the definition of the controllers inside robot_control package.

This repository is a perfect example of how it should look like.

When speaking specifically about the project in the repository, to launch the thing you have to use ROS command and launch the `robot_gazebo/launch/rrbot_world.launch'. You can change the 'robot' (in my explanation) or 'rrbot' (in this repository) to the name of your robot.

The launch command would be:

roslaunch robot_gazebo rrbot_world.launch

When you launch the gazebo this way, the gazebo_ros package starts to publish gazebo messages onto ROS topics and you can send commands through this gazebo_ros package inside Gazebo and control the robot in the simulation.