Hi everyone,

I’m currently following some ros2 tutorials for simulating a diff drive robot in Gazebo Classic. I’m using Gazebo Ignition and unfortunately the definitions aren’t interchangeable.

Just in case anyone else hits the same issue, this is the definition I ended up using instead:

        <plugin
            filename="libignition-gazebo-diff-drive-system.so"
            name="ignition::gazebo::systems::DiffDrive"
        >
            <!-- Wheel info: https://youtu.be/IjFcr5r0nMs?t=876 -->
            <left_joint>left_wheel_joint</left_joint>
            <right_joint>right_wheel_joint</right_joint>
            <wheel_separation>0.35</wheel_separation>
            <wheel_diameter>0.1</wheel_diameter>

            <!-- Limits -->
            <max_wheel_torque>200</max_wheel_torque>
            <max_wheel_acceleration>10.0</max_wheel_acceleration>

            <!-- Output -->
            <odometry_frame>odom</odometry_frame>
            <robot_base_frame>base_link</robot_base_frame>

            <publish_odom>true</publish_odom>
            <publish_odom_tf>true</publish_odom_tf>
            <publish_wheel_tf>true</publish_wheel_tf>

        </plugin>

The following links were pretty helpful when it came to tracking down the differences:
– https://github.com/chapulina/dolly/issues/28
– https://github.com/gazebosim/gz-sim/blob/main/examples/worlds/visualize_lidar.sd