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

#define echoPin 2
//attach pin D2 Arduino to pin Echo of HC-SR04
#define trigPin 3
// attach pin D3 Arduino to pin Trig of HC-SR04 \


long duration; // Variable to store time taken to the pulse
// to reach receiver

int distance; // Variable to store distance calculated using
// formula

void setup()
{
pinMode(trigPin,OUTPUT); // Sets the trigPin as an OUTPUT
pinMode(echoPin, INPUT); // Sets the echoPin as an INPUT

// Serial Communication is starting with 9600 of
// baudrate speed
Serial.begin(9600);

// The text to be printed in serial monitor
Serial.println("Distance measurement using Arduino Uno.");
delay(500);
}

void loop()
{
digitalWrite(trigPin, LOW);
delayMicroseconds(2); // wait for 2 ms to avoid
// collision in serial monitor

digitalWrite(trigPin,HIGH);
// turn on the Trigger to generate pulse
delayMicroseconds(10);
// keep the trigger "ON" for 10 ms to generate
// pulse for 10 ms.

digitalWrite(trigPin,LOW);
// Turn off the pulse trigger to stop
// pulse generation

// If pulse reached the receiver echoPin
// become high Then pulseIn() returns the
// time taken by the pulse to reach the
// receiver

duration = pulseIn(echoPin, HIGH);
distance= duration * 0.0344 / 2; // Expression to calculate
// distance using time

Serial.print("Distance: ");
Serial.print(distance); // Print the output in serial monitor
Serial.println(" cm");
delay(100);
}