RGB Led Control with Keypad

This project allows you to manage the RGB LED between modes and colors via the 4x4 Keypad. Thanks to the millis() structure, commands are processed without delay. 🎮 User Guide: Key A: Fixed speed Fade effect. B Key: Smooth transition with adjustable speed. C / D: Increases / Decreases the effect speed. 1 - 9: Quick Master Color selection. * / #: Special Intermediate Colors (Pink, Light Green, etc.). 0 Key: Turns off the system.