// Pin definitions for the RGB LED
const int redPin = 9;    // Red LED pin
const int greenPin = 10; // Green LED pin
const int bluePin = 11;  // Blue LED pin

void setup() {
  // Initialize serial communication for user input
  Serial.begin(9600);

  // Set RGB LED pins as outputs
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);

  // Print instructions for the user
  Serial.println("Enter a color name to change the RGB LED:");
  Serial.println("Supported colors: red, green, blue, yellow, cyan, magenta, white, off.");
}

void loop() {
  // Check if there is serial input available
  if (Serial.available() > 0) {
    // Read the user input as a string
    String input = Serial.readStringUntil('\n');
    input.trim(); // Remove any trailing newline or spaces
    input.toLowerCase(); // Convert to lowercase for case-insensitivity

    // Map the input to RGB values and set the LED
    if (input == "red") {
      setColor(255, 0, 0);
    } else if (input == "green") {
      setColor(0, 255, 0);
    } else if (input == "blue") {
      setColor(0, 0, 255);
    } else if (input == "yellow") {
      setColor(255, 255, 0);
    } else if (input == "cyan") {
      setColor(0, 255, 255);
    } else if (input == "magenta") {
      setColor(255, 0, 255);
    } else if (input == "white") {
      setColor(255, 255, 255);
    } else if (input == "off") {
      setColor(0, 0, 0);
    } else {
      Serial.println("Invalid color. Supported colors: red, green, blue, yellow, cyan, magenta, white, off.");
    }
  }
}

// Function to set the RGB LED color
void setColor(int redValue, int greenValue, int blueValue) {
  analogWrite(redPin, redValue);
  analogWrite(greenPin, greenValue);
  analogWrite(bluePin, blueValue);

  // Provide feedback to the user
  Serial.print("LED set to: R=");
  Serial.print(redValue);
  Serial.print(", G=");
  Serial.print(greenValue);
  Serial.print(", B=");
  Serial.println(blueValue);
}