Reactive Sound Cube 💡

ReactiveSoundCube.ino

/* Original by Najad on Hackster.io 
 * https://www.hackster.io/najad/reactive-sound-color-changing-cube-fdf705
 * 
 * Altered by JoshLmao
 * https://joshlmao.com
 */

#include "FastLED.h"
#define NUM_LEDS 10
#define DATA_PIN 5

struct S_RGB {
  int red;
  int green;
  int blue;
};

// Amount to delay each cycle by
const int DELAY_MS = 100;
// Set the analog pin to be used for the microphone
const int MIC_PIN = A5;

// Store the last random color
S_RGB m_rgb;
// All LEDs we want to take control of
CRGB m_leds[NUM_LEDS];
// Choose if debug info should be shown through the serial port and on board light
bool m_showDebug = false;

// Returns a random RGB color
S_RGB randColors()
{
  S_RGB color;
  color.red = random(255);
  color.green = random(255);
  color.blue = random(255);
}

void setup() 
{
  // Init serialization for debug info
  Serial.begin(9600);

  // Configure FastLED to work with our LEDs
  FastLED.addLeds<WS2811, DATA_PIN, RGB>(m_leds, NUM_LEDS);
  // Set their brightness
  LEDS.setBrightness(200);

  // Set the first state of the LEDs
  for(int i = 0; i < NUM_LEDS; i++)
  {
    m_leds[i] = CRGB(200, 200, 200);
    LEDS.show();
  }
}

void loop() {
  // Get the current raw value and rescale to be within our custom constraints
  int micValue = analogRead(MIC_PIN);
  micValue = map(micValue, 0, 1023, 0, 100);
  if(m_showDebug) {
   Serial.println("Value = " + String(micValue)); 
  }

  // Avoid listening to small amounts of noise
  int noiseThreshold = 25;
  if(micValue > noiseThreshold) 
  {
    if (m_showDebug) {
      Serial.println("Value is above threshold");  
    }
    
    // Iterate over all LEDs with a random color    
    for(int i = 0; i < NUM_LEDS; i++)
    {
      // Grabs a random RGB color
      m_rgb = randColors();

      // Set the led's to the color and update them
      m_leds[i] = CRGB(m_rgb.red, m_rgb.green, m_rgb.blue);
      LEDS.show();

      if (m_showDebug) {
        Serial.println("Color = r '" + String(m_rgb.red) + "' g '" + String(m_rgb.green) + "' b '" + String(m_rgb.blue) + "'"); 
      }
    }
  }

  delay(DELAY_MS);
}