Get acquainted with using the Simulink Support Package to program the Arduino.
This example shows you how to make an LED increase and decrease gradually in brightness (fade effect).
A sine-wave block is used to implement the fading effect. As the amplitude of the Sine Wave varies, the volume/brightness of the buzzer/LED will vary.
Techsource Technical Team (2020). Back to Basics: Fade LED (https://www.mathworks.com/matlabcentral/fileexchange/51536-back-to-basics-fade-led), MATLAB Central File Exchange. Retrieved .