Project 2 - Measuring the distance of an object using ultrasonic sensor and also smoothen the sensor data using moving average filter

Code:

int trigPin = 11;
int echoPin = 12;
int time, cm, inches;
int sum=0;
int avg;
int i;

void setup()

{

Serial.begin (9600);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
}

void loop()

{

digitalWrite(trigPin, LOW);
delayMicroseconds(5);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);


pinMode(echoPin, INPUT);
duration = pulseIn(echoPin, HIGH);

cm = (time/2) / 29.1;
inches = (time/2) / 74;
for (i=0; i<5; i++)
{
sum=sum+inches;
avg = sum/5;
}
Serial.print(avg);
Serial.print("Avg, ");
Serial.print(cm);
Serial.print("cm");
Serial.println();
Serial.print(inches);
Serial.print("in");
Serial.println();

delay(250);
}