[ERROR] [controller_manager]: Could not initialize the controller named 'diffdrive_controller'

[SpaceSoarer90]

Describe the Bug
[webots_controller_TurtleBot3Burger-5] [ERROR] [1727690103.628136189] [controller_manager]: Could not initialize the controller named 'diffdrive_controller'
[webots_controller_TurtleBot3Burger-5] Exception thrown during init stage with message: Invalid value set during initialization for parameter 'left_wheel_names': Parameter 'left_wheel_names' cannot be empty.

Trying the webots_ros2_turtlebot package but fails on the 'diffdrive_controller' node. This makes me unable to use the teleop nodes. I know that it uses "/opt/ros/jazzy/share/webots_ros2_turtlebot/resource/ros2control.yml" as the --params-file, however, that seems to be complete.

...
diffdrive_controller:
  ros__parameters:
    left_wheel_names: ["left wheel motor"]
    right_wheel_names: ["right wheel motor"]
...

Steps to Reproduce

1. Install necessary packages for webots_ros2_turtlebot (webots, ros2, ros-jazzy-ros2-turtle
2. $ ros2 launch webots_ros2_turtlebot robot_launch.py
3. See terminal for the error.

Expected behavior
Being able to drive the robot with teleop nodes.

Affected Packages
List of affected packages:

• webots_ros2_turtlebot

Screenshots

System

• Webots Version: [e.g., R2019b, R2020a revision 1]
• ROS Version: [e.g., Dashing, Eloquent]
• Operating System: [e.g., Windows 10, Linux Ubuntu 18.04, macOS Mojave]
• Graphics Card: [e.g., NVIDIA GeForce RTX 2080 11 GB, AMD Radeon RX 580 8GB, etc.]

Additional context
The wifi card of my laptop is not working, maybe that is the problem? The webots_controller python script uses ipc by default but maybe using tcp would be better?

[patham9]

Webots has been broken for quite some time for ROS2, I suggest using Gazebo.

[legubiao]

Hi I also enter this problem, and I solved it by modifying the launch file spawner parts to add the param file, like this:

    diff_drive_controller_spawner = Node(
        package='controller_manager',
        executable='spawner',
        arguments=["diff_drive_controller",
                   "--param-file", ros2_control_params] + controller_manager_timeout,
    )

I tested on ubuntu 24.04, ROS2 Jazzy, Webots 2023A from apt install.