Anywhere you use FALLING in your code, the number 2 will be substituted at compile time. #defines can get quite complex but can make your code shorter and more readable.

That provides a professional development environment, at least. The code base for the Arduino is another frustration. Bluntly, the use of setup() and loop() with main() being hidden really bugs me.

Once you learn how to read Morse code, you might want to teach your Arduino to understand it, too. Or, you can check out some other Morse-based projects.

Learn how to build your own desktop fully functional robot arm powered by Arduino hardware and assembled using 3D printed parts.