// https://www.arduino.cc/en/Reference/ArduinoAPDS9960
#include <Arduino_APDS9960.h>



void setup() {
  // put your setup code here, to run once:

  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
  
  Serial.begin(9600);
  while (!Serial); 
  // blocks the program untill opening of the Serial Monitor.
  
  if (!APDS.begin()) {
    Serial.println("Failed to start ADPS9960 gesture sensor!");
    digitalWrite(LED_BUILTIN, HIGH);   
    // turn the LED on (HIGH voltage level)
    while (1);    
  }

  Serial.println("  R  /  G  /  B  /  a  / color");
}

void loop() {
  // put your main code here, to run repeatedly:
  int r, g, b, a;
  float R, G, B;
  // check if a color reading is available
  if (APDS.colorAvailable()) {
    // read the color
    APDS.readColor(r, g, b, a);

    if (a>500) { // && a<4000
      R = float(r)/a;
      G = float(g)/a;
      B = float(b)/a;
      Serial.print(R, 3);
      Serial.print(" / ");
      Serial.print(G, 3);
      Serial.print(" / ");
      Serial.print(B, 3);
      Serial.print(" / ");
      Serial.print(a);
      Serial.print(" / ");
      if ( abs(R-0.84)<0.03 && abs(G-0.09)<0.03 && abs(B-0.16)<0.03) {
        Serial.print("red ");
      }
      if ( abs(R-0.70)<0.03 && abs(G-0.19)<0.03 && abs(B-0.17)<0.03) {
        Serial.print("orange ");
      }
      if ( abs(R-0.47)<0.03 && abs(G-0.38)<0.03 && abs(B-0.18)<0.03) {
        Serial.print("yellow ");
      }
      if ( abs(R-0.07)<0.03 && abs(G-0.49)<0.03 && abs(B-0.50)<0.03) {
        Serial.print("green ");
      }
      if ( abs(R-0.15)<0.03 && abs(G-0.35)<0.03 && abs(B-0.54)<0.03) {
        Serial.print("blue ");
      }
      Serial.println();
    }
  }
  delay(1000);

}