Example Code for Arduino-Color Detection

Hardware Preparation

DFRduino UNO R3 ×1
Fermion: TCS3200 RGB Color Sensor ×1
USB Cable A-B for Arduino Uno/Mega ×1
Jumper Wires (F/M) ×1

Software Preparation

Download Arduino IDE

Wiring Diagram

Other Preparation Work

To TCS3002D, when choose a color filter, it can allow only one particular color to get through and prevent other color. For example, when choose the red filter, Only red incident light can get through, blue and green will be prevented. So we can get the red light intensity. Similarly ,when choose other filters we can get blue or green light.

TCS3002D has four photodiode types. Red , blue, green and clear, reducing the amplitude of the incident light uniformity greatly, so that to increase the accuracy and simplify the optical. When the light project to the TCS3002D we can choose the different type of photodiode by different combinations of S2 and S3. Look at the form as follows.

TCS3002D can output the frequency of different square wave (occupies emptiescompared 50%),different color and light intensity correspond with different frequency of square wave. There is a relationship between the output and light intensity. The range of the typical output frequency is 2HZ~500KHZ. We can get different scaling factor by different combinations of S0 and S1. Look at the form as follows.

Sample Code

int s0=3,s1=4,s2=5,s3=6;
int out=2;
int flag=0;
byte counter=0;
byte countR=0,countG=0,countB=0;
void setup()
 {
 Serial.begin(115200);
 pinMode(s0,OUTPUT);
 pinMode(s1,OUTPUT);
 pinMode(s2,OUTPUT);
 pinMode(s3,OUTPUT);

 }
void TCS()
 {
 flag=0;
 digitalWrite(s1,HIGH);
 digitalWrite(s0,HIGH);
 digitalWrite(s2,LOW);
 digitalWrite(s3,LOW);
 attachInterrupt(0, ISR_INTO, CHANGE);
 timer0_init();

 }
void ISR_INTO()
 {
 counter++;
 }
 void timer0_init(void)
 {
  TCCR2A=0x00;
  TCCR2B=0x07;   //the clock frequency source 1024 points
  TCNT2= 100;    //10 ms overflow again
  TIMSK2 = 0x01; //allow interrupt
 }
 int i=0;
 ISR(TIMER2_OVF_vect)//the timer 2, 10ms interrupt overflow again. Internal overflow interrupt executive function
{
    TCNT2=100;
    flag++；
 if(flag==1)
  {
    countR=counter;
    Serial.print("red=");
    Serial.println(countR,DEC);
    digitalWrite(s2,HIGH);
    digitalWrite(s3,HIGH);
  }
  else if(flag==2)
   {
    countG=counter;
    Serial.print("green=");
    Serial.println(countG,DEC);
    digitalWrite(s2,LOW);
    digitalWrite(s3,HIGH);
   }
   else if(flag==3)
    {
    countB=counter;
    Serial.print("blue=");
    Serial.println(countB,DEC);
    Serial.println("\n");
    digitalWrite(s2,LOW);
    digitalWrite(s3,LOW);

    }
    else if(flag==4)
     {
     flag=0;
     }
       counter=0;
}
void loop()
 {
  TCS();
while(1);
 }

Result

Data exists deviation, you need to adjust the program according to environmental parameters