Published November 29, 2016

Color Sensor GY-31

Sensor for reading the reflection (or frequency reflected) light in RGB values.

BeginnerProtip1 hour14,230

Things used in this project

Hardware components

GY-31 sensor

Software apps and online services

Arduino IDE

Story

Features of the sensor

Identification of the sensor: GY-31

Power supply pins:

2x GND

2x VCC

The pins in the control unit:

1 / 2

The pins in the control unit

The pins in the control unit are used to receive signals that the sensor receives and processes.

LED - This pin is used for switching on and off the LED. From experience, it is much better to keep the LEDs lighted at all times due to the precision of the sensor in the absence of oscillation.

OUT - On servant to receive all of the total values of the sensor.

The sensor reads the light reflection through red, green, blue and without filter registers it as data, that is in the program converts the RGB value. We will connect the sensor to the Arduino Uno control unit, of course he supports the whole series of Arduino control units as well as the Raspberry Pi platform.

The code

Declaration and initialization of variables and constants.

The main function setup () are pins s0, s1, s2, s3 and 'OUT' mode is set to OUTPUT.

Pins S0 and S1 with the help of the tool digitalWrite set to HIGH. Why? There are several ways to read the reflection in multiple modes with 2%, 20% and 100% of reflection. Which is best? It depends on the environment and conditions that sensor works. We highly recommend that you try all the modes and choose the one who suits you best for the work.

We made one of our range for red, green and blue color.

Try tasks to make things easier.

1. Connect the color sensor with RGB LED and the value read out the sensor must be reflected the color of the LEDs.

2. Oral figure out and explain the term sensor calibration and provide example where it was used with color sensor. I make your color range.

Code

Code for Color sensor

const int s0 = A3;  
const int s1 = A4;  
const int s2 =A1;  
const int s3 = A2;  
const int out = A0;   
// values
int red = 0;  
int green = 0;  
int blue = 0;  

void setup()   
{  
  Serial.begin(9600); 
 
  pinMode(s0, OUTPUT);  
  pinMode(s1, OUTPUT);  
  pinMode(s2, OUTPUT);  
  pinMode(s3, OUTPUT);  
  pinMode(out, INPUT);   
  
  digitalWrite(s0, HIGH);  
  digitalWrite(s1, HIGH);  
} 
 
void loop() 
{  
  color();
  Serial.println("RED");  
  Serial.println(red, DEC);  
  Serial.println(" GREEN ");  
  Serial.println(green, DEC);  
  Serial.println(" BLUE ");  
  Serial.println(blue, DEC);  

  if (red < blue && red < green && red < 20)
  {  
      if (red <=10 && green <=10 && blue <=10){ 
     Serial.println("WHILE");   
  } else{
   Serial.println(" - (Red Color)"); 
  }
}  
else if (blue < red && blue < green)   
  {  
      if (red <=10 && green <=10 && blue <= 10){
     Serial.println("WHILE");  
  }else {
   Serial.println(" - (Blue Color)");   }
  }  
  else if (green < red && green < blue)  
  {  
    if (red <= 10 && green <=10 && blue <= 10){
     Serial.println("WHILE");   
  } else{
   Serial.println(" - (Green Color)");  } 
  }  
  else{
  Serial.println();  
  }
}
void color()  
{    
  digitalWrite(s2, LOW);  
  digitalWrite(s3, LOW);  
  red = pulseIn(out, digitalRead(out) == HIGH ? LOW : HIGH);  
  digitalWrite(s3, HIGH);  
  blue = pulseIn(out, digitalRead(out) == HIGH ? LOW : HIGH);  
  digitalWrite(s2, HIGH);  
  green = pulseIn(out, digitalRead(out) == HIGH ? LOW : HIGH);  
}

Color Sensor GY-31

Things used in this project

Hardware components

Software apps and online services

Story

Features of the sensor

The pins in the control unit

The code

Try tasks to make things easier.

Schematics

Connecting sensors

Code

Code for Color sensor

Credits

MakerRobotics

Comments

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Color Sensor GY-31

Color Sensor GY-31

Things used in this project

Hardware components

Software apps and online services

Story

Features of the sensor

The pins in the control unit

The code

Try tasks to make things easier.

Schematics

Connecting sensors

Code

Code for Color sensor

Credits

MakerRobotics

Comments

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