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Hello @Edvard,

Try out this code,

from launch import LaunchDescription
from launch_ros.actions import Node
from launch.substitutions import LaunchConfiguration
from launch.actions import DeclareLaunchArgument
from launch.substitutions import TextSubstitution



def generate_launch_description():


    enable_launch_arg = DeclareLaunchArgument(
        "enable", default_value=TextSubstitution(text="true")
        )

    node_1 = Node(
        package='rosservice',
        executable='rosservice',
        name='enable_limiter',
        arguments=["call","--wait","-b","/minicar/control/enable_limiter",],
        parameters=[{
        "enable": LaunchConfiguration('enable'),
        }]
    )

    return LaunchDescription([
        enable_launch_arg,
        node_1,
        ])

ros2 launch <path_to_launch_file> enable:=false

Hello @Edvard,

Try out this code,

from launch import LaunchDescription
from launch_ros.actions import Node
from launch.substitutions import LaunchConfiguration
from launch.actions import DeclareLaunchArgument
from launch.substitutions import TextSubstitution
 
def generate_launch_description():


    enable_launch_arg = DeclareLaunchArgument(
        "enable", default_value=TextSubstitution(text="true")
        )

    node_1 = Node(
        package='rosservice',
        executable='rosservice',
        name='enable_limiter',
        arguments=["call","--wait","-b","/minicar/control/enable_limiter",],
        parameters=[{
        "enable": LaunchConfiguration('enable'),
        }]
    )

    return LaunchDescription([
        enable_launch_arg,
        node_1,
        ])

Execution of code:

ros2 launch <path_to_launch_file> enable:=false