11 Raspberry Pi 4 Project Ideas

So, you’re starting to learn how to use your Raspberry Pi 4 board, and you may be wondering: what can you do with your Pi? What fun project can you start, and what can this project teach you so you’re progressing while building something? In this post I’ll give you some things to do with … Read more

Arduino Delay [Tutorial]

In this tutorial you’ll learn how to properly use the delay() function to add some delay between 2 actions in your Arduino programs. Then, you will discover why using delay() is often not a good idea when you want to make your programs scale, and how to fix that. All right, let’s get started! Why … Read more

Build a ROS2 Data Pipeline With ROS2 Topics

In this tutorial I’ll show you how you can chain ROS2 topics and thus build a data pipeline through several nodes. This is a pretty common use case in robotics: you get some data from a sensor, and you need to pass it through several parts of your applications. Each part needs the data to … Read more

ros2 service Command Line Tool – Debug ROS2 Services

In this tutorial you’ll use the ros2 service command line tool to debug the services that you start from within your nodes – or nodes that already exist in your graph. As a reminder, a service has 2 sides: the server (unique), and the client (multiple clients possible). With topics, you can use ros2 topic … Read more

ros2 bag – Save and Replay Topic Data

In this tutorial you’ll learn how to use ROS2 bags, with the ros2 bag command line tool, in order to save and replay data from your ROS2 topics. Why and when to use ROS2 bags? Imagine you’re working on your real – physical – robot, and you are developing an obstacle algorithm for the robot. … Read more