Color Sensor serial moniter always stays at 255

Projects General Guidance
1

Hello everybody,I have a color sensor and when i put a rgb(red,green,blue) color in front, the led lights up perfectly,but when i look at my serial moniter the three numbers always stay at 255

arduino_buzzer_with_PIR_sensor.ino (1.01 KB)

2 
int ledPin = 4;                // Pin LED is connected to
int piezoBuzzerPin = 3;     // Pin Piezo Buzzer is connected to
int pirSensorPin = 2;               // PIN PIR Sensor is connected to

int motionDetected = LOW;             // Start MotionDetected as low (No motion detected)


void setup() {
  pinMode(ledPin, OUTPUT);      // declare LED as output
  pinMode(pirSensorPin, INPUT);     // declare the PIR sensor as input
  pinMode(piezoBuzzerPin, OUTPUT); //declare buzzer as output
  Serial.begin(9600); //Set serial out if we want debugging
  delay(5000); //Allow time for the PIR Sensor to calibrate
}


void loop(){
  motionDetected = digitalRead(pirSensorPin);  // Read the PIR sensor
  if(motionDetected == HIGH) //If motion detected
  {            
    digitalWrite(ledPin, HIGH);
    analogWrite(piezoBuzzerPin, 200);
    delay(100);
    analogWrite(ledPin, LOW);
    analogWrite(piezoBuzzerPin, 25);
    delay(100);
  }
  digitalWrite(ledPin, LOW);
  digitalWrite(piezoBuzzerPin,LOW);
}

when i look at my serial moniter the three numbers always stay at 255

That's quite remarkable.

3

I am so sorry i sent the wrong file

arduino_color_sensor.ino (1.61 KB)

4

I already downloaded your code and posted it in code tags.
This time, it's down to you.

5

Please post the correct file using code tags, as described in the "How to use this forum" post.

6

ok here is my code using code tags:

int redPin=11;
int greenPin=10;
int bluePin=6;

int s2=7;
int s3=8;
int outPin = 4;

int rColorStrength;
int gColorStrength;
int bColorStrength;


unsigned int pulseWidth;

void setup() {
  Serial.begin(9600);

pinMode(redPin,OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);

pinMode(s2, OUTPUT);
pinMode(s3, OUTPUT);
pinMode(outPin, INPUT);
  

}

void loop() {
// RED
digitalWrite(s2,LOW);
digitalWrite(s3,LOW);

pulseWidth = pulseIn(outPin,LOW);

rColorStrength = (pulseWidth/400.) -1;

rColorStrength = (255- rColorStrength);
//     GREEN
digitalWrite(s2,HIGH);
digitalWrite(s3,HIGH);

pulseWidth = pulseIn(outPin,LOW);

gColorStrength = (pulseWidth/400.) -1;

gColorStrength = (255- gColorStrength);
// BLUE

digitalWrite(s2,LOW);
digitalWrite(s3,HIGH);

pulseWidth = pulseIn(outPin,LOW);

bColorStrength = (pulseWidth/400.) -1;


bColorStrength = (255- bColorStrength);

Serial.print(rColorStrength);
Serial.print(" , ");
Serial.print(gColorStrength);
Serial.print(" , ");
Serial.println(bColorStrength);
Serial.println("");

if(rColorStrength > bColorStrength && rColorStrength > gColorStrength){
  digitalWrite(redPin, HIGH);
  digitalWrite(bluePin,LOW);
  digitalWrite(greenPin,LOW);
}

if(gColorStrength > bColorStrength && gColorStrength > rColorStrength){
  digitalWrite(redPin, LOW);
  digitalWrite(bluePin,LOW);
  digitalWrite(greenPin,HIGH);
}

if(bColorStrength > rColorStrength && bColorStrength > gColorStrength){
  digitalWrite(redPin, LOW);
  digitalWrite(bluePin,HIGH);
  digitalWrite(greenPin,LOW);
}

delay(250);
}
7

No obvious problem with the code but I do wonder what color sensor you have.

Do you think that information could be useful?

8

It is a Tcs3200, the rgb led is lighting up to the good color but in the serial moniter it still says 255

9

So you made some significant changes from the reference code. Why?

/*__________________________________________________________
 
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
14CORE.com ARDUINO COLOR SENSOR TCS230/TCS3200
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
____________________________________________________________
*/
 
enum Colours {RED,GREEN,BLUE,CLEAR}; //Unumerate Colours RED,GREEN,BLUE and ClEAR
#define s2Pin 2 //S2 Colour Selection inputs define and connected to arduino pin 2
#define s3Pin 3 //S3 Colour Selection inputs define and connected to arduino pin 3
#define outPin 4  //Output define in Arduino pin 4
 
 
void setup()
{
  Serial.begin(9600); //Serial begin at baudrate 9600
  pinMode(s2Pin, OUTPUT); //Pin Mode s2Pin as Output
  pinMode(s3Pin, OUTPUT); //Pin Mode s2Pin as Output
  pinMode(outPin, INPUT); //Pin Mode s2Pin as Input
}
void loop()
{
 
  Serial.print(ReadColour(RED)); //Read colors value to serial communication 
  Serial.print(" : "); 
  Serial.print(ReadColour(GREEN));
  Serial.print(" : "); 
  Serial.print(ReadColour(BLUE));
  Serial.print(" : "); 
  Serial.println(ReadColour(CLEAR));
}
 
// Function reads colours and returns the a value betwenn 0 and 255 
byte ReadColour(byte Colour)
{  
  switch(Colour)
  {
    case RED:
      digitalWrite(s2Pin, LOW);
      digitalWrite(s3Pin, LOW);
      break;
     
    case GREEN:
      digitalWrite(s2Pin, HIGH);
      digitalWrite(s3Pin, HIGH);
      break;    
       
    case BLUE:
      digitalWrite(s2Pin, LOW);
      digitalWrite(s3Pin, HIGH);
      break;
       
    case CLEAR:
      digitalWrite(s2Pin, HIGH);
      digitalWrite(s3Pin, LOW);
      break; 
  }
     
  return map(pulseIn(outPin, HIGH), 30, 2500, 255, 0); //PWM map to 30,2500,255,0
}