Tutorial 2 - ROS 2 Basics & Packages

🎯 Learning Objectives

• Grasp what ROS 2 is and how it enables modular robotics software
• Understand key components like nodes, topics, and services
• Know how data flows between different parts of a robotic system

What is ROS 2?

ROS 2 (Robot Operating System 2) is a framework that helps different parts of a robot — like sensors, motors, and control systems — communicate.

You can think of a robot as a team of people:

• Sensors = the eyes and ears
• Motors = the arms and legs
• Control Code = the brain

ROS 2 is the language they use to coordinate.

📘 Learn more: ROS 2 Overview

Key ROS 2 Concepts (with Diagram)

+-------------+         +-------------+         +-------------+
|  Sensor     |-------> |   Node A    |-------> |  Motor Cmd  |
| (Camera)    | Topic   | (Talker)    | Topic   | (Listener)  |
+-------------+         +-------------+         +-------------+