cps_rmp220_support/launch/robot_joystick.launch.py

from launch import LaunchDescription
from launch_ros.actions import Node
from launch.substitutions import LaunchConfiguration, Command, FindExecutable, PathJoinSubstitution
from launch.actions import DeclareLaunchArgument
from launch_ros.substitutions import FindPackageShare
from launch_ros.descriptions import ParameterValue
from launch_ros.actions import LifecycleNode

import os
from ament_index_python.packages import get_package_share_directory

def generate_launch_description():
    use_sim_time = LaunchConfiguration('use_sim_time')

    joy_params = os.path.join(get_package_share_directory('cps_rmp220_support'),'config','joystick.yaml')

    joy_node = Node(
            package='joy',
            executable='joy_node',
            parameters=[joy_params, {'use_sim_time': use_sim_time}],
         )

    teleop_node = Node(
            package='teleop_twist_joy',
            executable='teleop_node',
            name='teleop_node',
            parameters=[joy_params, {'use_sim_time': use_sim_time}],
            remappings=[('/cmd_vel','/cmd_vel_joy')]
         )
    
    twist_mux_params = os.path.join(get_package_share_directory('cps_rmp220_support'),'config','twist_mux.yaml')
    twist_mux = Node(
            package="twist_mux",
            executable="twist_mux",
            parameters=[twist_mux_params, {'use_sim_time': False}],
            #remappings=[('/cmd_vel_out','/diffbot_base_controller/cmd_vel_unstamped')]
        )
    
    return LaunchDescription([
        DeclareLaunchArgument(
            'use_sim_time',
            default_value='false',
            description='Use sim time if true'),
        joy_node,
        teleop_node,
    ])

def generate_launch_description():
    robot_description_content = Command(
        [
            PathJoinSubstitution([FindExecutable(name="xacro")]),
            " ",
            PathJoinSubstitution(
                [
                    FindPackageShare("bot_mini_description"),
                    "urdf",
                    "odrive_diffbot.urdf.xacro"
                ]
            ),
        ]
    )
    robot_description = {"robot_description": ParameterValue(robot_description_content, value_type=str)}

    robot_controllers = PathJoinSubstitution(
        [
            FindPackageShare("bot_mini_bringup"),
            "config",
            "diffbot_controllers.yaml",
        ]
    )

    control_node = Node(
        package="controller_manager",
        executable="ros2_control_node",
        parameters=[robot_description, robot_controllers],
        output="both",
    )

    robot_state_pub_node = Node(
        package="robot_state_publisher",
        executable="robot_state_publisher",
        output="both",
        parameters=[robot_description],
    )

    joint_state_broadcaster_spawner = Node(
        package="controller_manager",
        executable="spawner",
        arguments=["joint_state_broadcaster", "-c", "/controller_manager"],
    )

    robot_controller_spawner = Node(
        package="controller_manager",
        executable="spawner",
        arguments=["diffbot_base_controller", "-c", "/controller_manager"],
    )

    joystick_spawner = Node(
        package="joy",
        executable="joy_node"
    )

    teleop_spawner = Node(
        package="rmp220_teleop",
        executable="rmp220_teleop",
        remappings=[('/diffbot_base_controller/cmd_vel_unstamped','/cmd_vel_joy')]
    )

    cam_node = Node(
        package="ros2_cam_openCV",
        executable="cam_node"
    )

    lidar_dir = os.path.join(get_package_share_directory('lslidar_driver'), 'params', 'lsx10.yaml')         
    lidar_node = LifecycleNode(
        package='lslidar_driver',
        executable='lslidar_driver_node',
        name='lslidar_driver_node',
        output='screen',
        emulate_tty=True,
        namespace='',
        parameters=[lidar_dir],
    )

    twist_mux_params = os.path.join(get_package_share_directory('bot_mini_bringup'),'config','twist_mux.yaml')
    twist_mux = Node(
            package="twist_mux",
            executable="twist_mux",
            parameters=[twist_mux_params, {'use_sim_time': False}],
            remappings=[('/cmd_vel_out','/diffbot_base_controller/cmd_vel_unstamped')]
        )

    return LaunchDescription([
        twist_mux
    ])