Getting Started with ROS on Embedded Systems - User Guide - C++ - Names

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Getting Started with ROS on Embedded Systems
ROS on Embedded Systems Basics
Getting Started
Installation Configuration Setting up environment Execution
C++ User Guide
Package set up Initialization Topics Messages Names Publishers and subscribers Launch files Parameters
Examples
Basic pipelines V4L2 capture node Turn detector node Proximity detector node
Performance
Xavier TX1 TX2 Nano
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Introduction

This wiki is based on the following ROS2 wiki: https://docs.ros.org/en/foxy/Tutorials/Intermediate/Launch/Using-ROS2-Launch-For-Large-Projects.html. In here you can find the usage of names and namespaces.

Namespaces

These are prefixes that can help divide systems into sections and even allow the usage of the same node names without conflicts. For example, if on a system we have n number of the same sensors, we would have n nodes and topics that would be named the same. We can use a namespace to distinguish them, which allows us to use the same nodes and setup without the need to change node names and topics.