A Practical ROS 2 Starter Stack for Your First Robot

Your first ROS 2 robot does not need twelve packages. It needs four things that agree with each other: a description of the robot, a way to drive it, a first real job for it to do, and a way for it to know where it is. Buy those in the wrong order and you will spend your weekends reconciling other people's assumptions. Buy them as a stack and each piece makes the next one easier.

Here is the order we recommend, using the packages on our own shelf.

1. Describe the robot first (URDF)

Everything in ROS 2 — simulation, visualization, navigation — starts from the robot model. The Robot URDF Model Pack gives you three validated models (a differential-drive bot, a 3-DOF arm, and a mecanum base) with launch files and an RViz configuration, so you can see and check your robot before a single motor turns. Start from the model closest to your build and edit dimensions, not philosophy.

2. Drive it by hand (teleoperation)

Before autonomy, prove the drivetrain. The ROS 2 Teleoperation Node Package publishes Twist commands from your keyboard with acceleration ramping and a deadman watchdog that eases the robot to a stop when input stops — the two behaviors you want between a beginner and a runaway base. If it drives badly by hand, no autonomy stack will save it.

3. Give it a first job (line following)

A line follower is the smallest complete autonomy loop: sense, decide, steer, repeat. The ROS 2 Line-Follower Node Package runs in sensor and camera modes with PID steering and a watchdog, so your robot goes from "moves when told" to "does a task on its own" in one afternoon.

4. Let it map the room (SLAM)

When the robot can move and behave, give it a map. The SLAM Mapping Config Pack for RPLIDAR A1/A2 ships tuned slam_toolbox, Nav2, and EKF configuration files for the most common hobby lidar, so you are adjusting parameters for your space instead of reverse-engineering someone's launch files. This is also the step where the URDF from step 1 pays rent: navigation trusts your model.

A bonus for the workbench

If your build uses hobby servos, the Servo Calibration Firmware for Arduino (sketch plus a command-line tool) will save you the guess-and-check dance when you center and range each joint.

An honest note on testing

The code packages above were validated with automated test harnesses in simulation — the teleop node's watchdog and ramping behavior, the URDF models' joint and link structure, the SLAM configs' syntax. They were not run on our physical robot, because we do not know your robot. Expect to tune PID gains, wheel dimensions, and sensor placement on your hardware; that is normal robotics, not a defect. What you are buying is a coherent, tested starting point instead of four unrelated downloads.