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

//Header to use LCD functions
#include<LiquidCrystal.h>

#define trigger 18

#define echo 19

//pins connected to LCD
LiquidCrystal lcd(2,3,4,5,6,7);

float time=0,distance=0;

void setup()

{
Serial.begin(9600);

//To begin LCD display
lcd.begin(16,2);

//declaring pin2 as output
pinMode(trigger,OUTPUT);

pinMode(echo,INPUT);

//To display in LCD
lcd.print(" Ultra sonic");

lcd.setCursor(0,1);

//To display in LCD
lcd.print("Measuring distance");

delay(2000);

lcd.clear();

//To display in LCD
lcd.print(" Using ultra sonic sensor");

//delay 2 sec
delay(1000);

}

void loop()

{

lcd.clear();

//sensor is triggered by pin 2 as output
digitalWrite(trigger,LOW);

delayMicroseconds(2);

digitalWrite(trigger,HIGH);

delayMicroseconds(10);

time=pulseIn(echo,HIGH);

//calculating distance using formula.
distance=time*340/20000;

lcd.clear();

//to display in LCD
lcd.print("Distance:");

lcd.print(distance);

//to display in LCD
lcd.print("cm");

lcd.setCursor(0,1);

lcd.print("Distance:");

//To display in LCD
lcd.print(distance/2.54);

lcd.print("inches");

//delay 1 sec
delay(1000);

Serial.print("Distance:");

Serial.println(distance);

Serial.print("inches");

delay(1000);
}

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