Arduino Tutorial: Driving RGBW LED Strips for Custom Color Effects

				
					// Define RGBW control pins
#define RED_PIN    12   // D6
#define GREEN_PIN  13   // D7
#define BLUE_PIN   14   // D5
#define WHITE_PIN   4   // D2

// PWM range setting (0-1023 for Arduino)
const int pwmRange = 1023;

void setup() {
  // Initialize serial communication
  Serial.begin(115200);
  
  // Set PWM pins as output
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(BLUE_PIN, OUTPUT);
  pinMode(WHITE_PIN, OUTPUT);
  
  // Initial state: all off
  analogWrite(RED_PIN, 0);
  analogWrite(GREEN_PIN, 0);
  analogWrite(BLUE_PIN, 0);
  analogWrite(WHITE_PIN, 0);
  
  Serial.println("RGBW LED Controller Ready");
}

void loop() {
  // Example: cycle through different colors
  setColor(255, 0, 0, 0);    // Red
  delay(1000);
  setColor(0, 255, 0, 0);    // Green
  delay(1000);
  setColor(0, 0, 255, 0);    // Blue
  delay(1000);
  setColor(0, 0, 0, 255);    // White
  delay(1000);
  setColor(255, 255, 255, 255); // All on (full brightness)
  delay(1000);
  setColor(0, 0, 0, 0);      // All off
  delay(1000);
  
  // Example: warm white gradient
  for(int i = 0; i = 0; i--) {
    setColor(i, i/3, 0, i/2);
    delay(20);
  }
}

// Function to set RGBW color (0-255)
void setColor(int red, int green, int blue, int white) {
  // Map 0-255 values to 0-pwmRange
  analogWrite(RED_PIN, map(red, 0, 255, 0, pwmRange));
  analogWrite(GREEN_PIN, map(green, 0, 255, 0, pwmRange));
  analogWrite(BLUE_PIN, map(blue, 0, 255, 0, pwmRange));
  analogWrite(WHITE_PIN, map(white, 0, 255, 0, pwmRange));
  
  Serial.print("Set Color - R:");
  Serial.print(red);
  Serial.print(" G:");
  Serial.print(green);
  Serial.print(" B:");
  Serial.print(blue);
  Serial.print(" W:");
  Serial.println(white);
}