gistfile1.txt

// defines the constants
const int motorPin= 11;
const int echoPin = 12;
const int trigPin = 13;


// defines variables
long duration;
int distance;

void setup() {
pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
pinMode(echoPin, INPUT); // Sets the echoPin as an Input
pinMode(motorPin, OUTPUT); // Enables the DC-motor to run
Serial.begin(9600); // Starts the serial communication
}


void loop() {
// Clears the trigPin
digitalWrite(trigPin, LOW);
delayMicroseconds(2);

// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);

// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);

// Calculating the distance
distance= (duration / 2) * 0.0343;

// Sets the motorPin on HIGH to keep it running and LOW to turn it off
if (distance <= 15) {
  digitalWrite(motorPin, HIGH);
}
else {
  digitalWrite (motorPin, LOW);
}

// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);


// Prints the distance on the Serial Monitor
Serial.print(distance);
Serial.println(" cm");
delay(100);
}