ROS2 Suite/ros domain id

Introduction

ROS 2 uses for communication is DDS. In DDS, the primary mechanism for having different logical networks share a physical network is known as the Domain ID. ROS 2 nodes on the same domain can freely discover and send messages to each other, while ROS 2 nodes on different domains cannot. All ROS 2 nodes use domain ID 0 by default. To avoid interference between different groups of computers running ROS 2 on the same network, a different domain ID should be set for each group.

You'll have to set ROS domain ID while installation, for Advantech ROS2 Suite, you can choose a domain ID between 0 and 101.

Prerequisite

Please make sure that ROS2 Suite v1.3.0 or higher have been installed in your environment.
Currently, this function only supports for ROS2 humble.

How to

Set ROS_DOMAIN_ID

Command for set ROS_DOMAIN_ID of the ROS2 Suite application.

$ cd /usr/local/Advantech/ros
$ bash -i change-ros-domain-id.sh

It can also be manually set ROS_DOMAIN_ID in host or container by following steps.

• Set ROS_DOMAIN_ID in host

Please refer to Q&A : How to set ROS_DOMAIN_ID in host

• Set ROS_DOMAIN_ID in docker container

Step1: open docker-compose.yml

$ cd /usr/local/Advantech/ros/container/edge-ros2-foxy/docker-compose/<docker_container_name>
$ vim docker-compose.yml

Step2: set ROS_DOMAIN_ID=<your_domain_id>

.
.
.
   environment:
    - ROS_DOMAIN_ID=<your_domain_id>
.
.
.

Step3: restart container for update environment variables of docker container

$ cd /usr/local/Advantech/ros/container/edge-ros2-foxy
$ ./stop.sh <docker_container_name>
$ ./launch.sh <docker_container_name>