color_recognizer.ino

/*********
  Rui Santos
  Complete project details at http://randomnerdtutorials.com  
*********/

// TCS230 or TCS3200 pins wiring to Arduino
#define S0 4
#define S1 5
#define S2 6
#define S3 7
#define sensorOut 8

// Stores frequency read by the photodiodes
int redFrequency = 0;
int greenFrequency = 0;
int blueFrequency = 0;

// Stores the red. green and blue colors
int redColor = 0;
int greenColor = 0;
int blueColor = 0;

void setup() {
  // Setting the outputs
  pinMode(S0, OUTPUT);
  pinMode(S1, OUTPUT);
  pinMode(S2, OUTPUT);
  pinMode(S3, OUTPUT);
  
  // Setting the sensorOut as an input
  pinMode(sensorOut, INPUT);
  
  // Setting frequency scaling to 20%
  digitalWrite(S0,HIGH);
  digitalWrite(S1,LOW);
  
  // Begins serial communication
  Serial.begin(9600);
}

void loop() {
  // Setting RED (R) filtered photodiodes to be read
  digitalWrite(S2,LOW);
  digitalWrite(S3,LOW);
  
  // Reading the output frequency
  redFrequency = pulseIn(sensorOut, LOW);
  // Remaping the value of the RED (R) frequency from 0 to 255
  // You must replace with your own values. Here's an example: 
  // redColor = map(redFrequency, 70, 120, 255,0);
  //redColor = map(redFrequency, XX, XX, 255,0);
  
  // Printing the RED (R) value
  //Serial.print("R = ");
  //Serial.print(redColor);
  delay(50);
  
  // Setting GREEN (G) filtered photodiodes to be read
  digitalWrite(S2,HIGH);
  digitalWrite(S3,HIGH);
  
  // Reading the output frequency
  greenFrequency = pulseIn(sensorOut, LOW);
  // Remaping the value of the GREEN (G) frequency from 0 to 255
  // You must replace with your own values. Here's an example: 
  // greenColor = map(greenFrequency, 100, 199, 255, 0);
  //greenColor = map(greenFrequency, XX, XX, 255, 0);
  
  // Printing the GREEN (G) value  
  //Serial.print(" G = ");
  //Serial.print(greenColor);
  delay(50);
 
  // Setting BLUE (B) filtered photodiodes to be read
  digitalWrite(S2,LOW);
  digitalWrite(S3,HIGH);
  
  // Reading the output frequency
  blueFrequency = pulseIn(sensorOut, LOW);
  // Remaping the value of the BLUE (B) frequency from 0 to 255
  // You must replace with your own values. Here's an example: 
  // blueColor = map(blueFrequency, 38, 84, 255, 0);
  //blueColor = map(blueFrequency, XX, XX, 255, 0);
  
  // Printing the BLUE (B) value 
  //Serial.print(" B = ");
  //Serial.print(blueColor);
  delay(50);

  // Checks the current detected color and prints
  // a message in the serial monitor

  if (redFrequency > 70 &&  greenFrequency < 100 && greenFrequency > 50 && blueFrequency >= 26) {
    Serial.println("Green");
  }

  else if (redFrequency > 70 &&  greenFrequency < 90 && greenFrequency > 50 && blueFrequency <26) {
    Serial.println("Blue");
  }

  else if (redFrequency < 40 &&  greenFrequency > 95 && blueFrequency < 26) {
    Serial.println("Red");
  }

  else if (redFrequency < 26 &&  greenFrequency < 40 && blueFrequency < 20) {
    Serial.println("Yellow");
  }

  else {
    Serial.print("Color Not Found, ");
    Serial.print("R = ");
    Serial.print(redFrequency);
    Serial.print(", G = ");
    Serial.print(greenFrequency);
    Serial.print(", B = ");
    Serial.println(blueFrequency);
  }
  /*
  if(redColor > greenColor && redColor > blueColor){
      Serial.println(" - RED detected!");
  }
  if(greenColor > redColor && greenColor > blueColor){
    Serial.println(" - GREEN detected!");
  }
  if(blueColor > redColor && blueColor > greenColor){
    Serial.println(" - BLUE detected!");
  }*/
}