This is when you pull out your traditional Morse code keyer ... interfacing an Arduino with a straight key. You can see the straight key being pressed by a hobby servo in the image above.

You compile the code using the compiler ... The computer is a Sparkfun Redbot Mainboard which is compatible with the Arduino Uno but provides a much different layout and includes a motor driver ...

“Uno R4 WiFi includes an error-catching mechanism that detects run-time crashes and provides detailed explanations and hints about the code line causing the crash,” according to Arduino – Electronics ...