This FREE book presents a series of activities to teach the basics of computer networks. While you will not learn all aspects of computer networking, we hope that it will serve as a good starting point. To network micro:bits, we use custom micro:bit radio to radio communication.

When one hears the word radio, what comes to mind is the radio that blasts out tunes from your favorite radio broadcasting channel. But, a radio, or a radio transceiver (transmitter/receiver), is used in communications to generate and receive radio waves that contain information such as audio, video or digital data. And all micro:bits have built-in radios1 .

Each chapter presents interesting challenges in radio communications and networking with micro:bits. After every few chapters, there’s an exciting game to look forward to! In the programming sections, you will use the JavaScript Blocks Editor at https://makecode.microbit.org/ to develop solutions to overcome those challenges .