The AWS DeepRacer device info ROS package creates the device_info_node
, which is part of the core AWS DeepRacer application and launches from the deepracer_launcher
. For more details about the application and the components, see the aws-deepracer-launcher repository.
This node is responsible for providing the hardware version of the AWS DeepRacer device and the software version of the aws-deepracer-core
Debian package. It provides services and functions to detect the current hardware and software version and log the secure boot information.
The source code is released under Apache 2.0 (https://aws.amazon.com/apache-2-0/).
The AWS DeepRacer device comes with all the prerequisite packages and libraries installed to run the device_info_pkg
. For more information about the preinstalled set of packages and libraries on the AWS DeepRacer, and about installing the required build systems, see Getting started with AWS DeepRacer OpenSource.
The device_info_pkg
specifically depends on the following ROS 2 packages as build and run dependencies:
deepracer_interfaces_pkg
: This package contains the custom message and service type definitions used across the AWS DeepRacer core application.
Open a terminal on the AWS DeepRacer device and run the following commands as the root user.
-
Switch to the root user before you source the ROS 2 installation:
sudo su
-
Source the ROS 2 Foxy setup bash script:
source /opt/ros/foxy/setup.bash
-
Create a workspace directory for the package:
mkdir -p ~/deepracer_ws cd ~/deepracer_ws
-
Clone the
device_info_pkg
on the AWS DeepRacer device:git clone https://github.com/aws-deepracer/aws-deepracer-device-info-pkg.git
-
Fetch unreleased dependencies:
cd ~/deepracer_ws/aws-deepracer-device-info-pkg rosws update
-
Resolve the
device_info_pkg
dependencies:cd ~/deepracer_ws/aws-deepracer-device-info-pkg && apt-get update rosdep install -i --from-path . --rosdistro foxy -y
-
Build the
device_info_pkg
anddeepracer_interfaces_pkg
:cd ~/deepracer_ws/aws-deepracer-device-info-pkg && colcon build --packages-select device_info_pkg deepracer_interfaces_pkg
Although the device_info_node
is built to work with the AWS DeepRacer application, you can run it independently for development, testing, and debugging purposes.
To launch the built device_info_node
as the root user on the AWS DeepRacer device, open another terminal on the AWS DeepRacer device and run the following commands as the root user:
-
Switch to the root user before you source the ROS 2 installation:
sudo su
-
Source the ROS 2 Foxy setup bash script:
source /opt/ros/foxy/setup.bash
-
Source the setup script for the installed packages:
source ~/deepracer_ws/aws-deepracer-device-info-pkg/install/setup.bash
-
Launch the
device_info_node
using the launch script:ros2 launch device_info_pkg device_info_pkg_launch.py
The device_info_pkg_launch.py
included in this package provides an example demonstrating how to launch the deepracer_navigation_node
.
from launch import LaunchDescription
from launch_ros.actions import Node
def generate_launch_description():
return LaunchDescription([
Node(
package='device_info_pkg',
namespace='device_info_pkg',
executable='device_info_node',
name='device_info_node'
)
])
Service name | Service type | Description |
---|---|---|
get_device_info |
GetDeviceInfoSrv |
A service that is called to get the AWS DeepRacer hardware and software packages version information. |