Line follower robot

[Aquib javed khan]

line follower robot using ir sensor, my value on white is less than black. what should i do?

after burning code to arduino it is not working.

when i am try to open serial port ,this also not showing any value

my code is below ..

 

 

 

int leftPins[] = {5,7,4}; //On the for PWM , two pins for motor direction;
int rightPins[] = {6,3,2};
const int MIN_PWM = 64; //this can range from 0 to MAX_PWM;
const int MAX_PWM = 128; //this can range from around 50 to 255;
const int leftSensorPin = 0;
const int rightSensorPin = 1;
int sensorThreshold = 0;

void setup()
{
  for(int i=1; i<3; i++)
  {
    pinMode(leftPins, OUTPUT);
    pinMode(rightPins, OUTPUT);
  }
}
void loop()
{
    int leftVal = analogRead(leftSensorPin);
    int rightVal = analogRead(rightSensorPin);
    
       if(sensorThreshold == 0){ //have the sensor been calibrated ?
      // if not, calibrate sensor to somethingabpve the ambient average
       sensorThreshold = ((leftVal + rightVal) / 2) + 100 ;  
      }
       if( leftVal > sensorThreshold || rightVal > sensorThreshold)
       {
         // if there is adeqate light to move ahead
         setSpeed(rightPins, map(rightVal,0,1023, MIN_PWM, MAX_PWM));
         setSpeed(leftPins, map(leftVal,0,1023, MIN_PWM, MAX_PWM));
       }
}

void setSpeed(int pins[], int speed )
{  
  if(speed < 0)
  {
    digitalWrite(pins[1],HIGH);
    digitalWrite(pins[2],LOW);
    speed = -speed;
  }
 else
  {
   digitalWrite(pins[1],LOW);
   digitalWrite(pins[2],HIGH);
  }
 analogWrite(pins[0],speed);
}

 

 

 

 

[AJISH ALFRED]

Hi Aquib,

 

“if( leftVal > sensorThreshold || rightVal > sensorThreshold)”

 

You are checking for a high threshold, right?

Why dont you set a low threshold value, which is graeter than zero and check for it?

 

“if( leftVal < sensorThreshold || rightVal < sensorThreshold)”

[Author]

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