openarm_test/src/openarm_camera/launch/launch_camera.launch.py

import os
from launch import LaunchDescription
from launch.actions import ExecuteProcess, TimerAction, IncludeLaunchDescription
from launch.launch_description_sources import PythonLaunchDescriptionSource
from launch.substitutions import PathJoinSubstitution
from launch_ros.actions import Node
from launch_ros.substitutions import FindPackageShare
from ament_index_python.packages import get_package_share_directory
import xacro

def generate_launch_description():
    camera_init = Node(
        package='openarm_camera',
        executable='camera_pub_node',
        output='screen'
    )
    camera_cal_init = Node(
        package='openarm_camera',
        executable='camera_node',
        output='screen'
    )
    stereo_hand_depth = Node(
        package='openarm_camera',
        executable='stereo_hand_depth_node',
        output='screen'
    )
    return LaunchDescription([
        camera_init,
        # TimerAction(
        # period=4.0,
        # actions=[camera_cal_init]
        # ),
        TimerAction(
        period=8.0,
        actions=[stereo_hand_depth]
        ),
    ])