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

ABINAYA INBAMANI, BATCH

ANSWER 

code--->

 

#include

#define WINDOW_SIZE 5

#define trigger 18

#define echo 19

int INDEX = 0;

//int VALUE = 0;

int SUM = 0;

int READINGS[WINDOW_SIZE];

int AVERAGED = 0;

 

LiquidCrystal lcd(2,3,4,5,6,7);

float time=0,distance=0,distance1=0;

void setup()

{

 lcd.begin(16,2);

 pinMode(trigger,OUTPUT);

 pinMode(echo,INPUT);

 lcd.print(" Ultra sonic");

 lcd.setCursor(0,1);

 lcd.print("Distance Meter");

 delay(2000);

 lcd.clear();

 lcd.print(" Circuit Digest");

 delay(2000);

}

void loop()

{

 lcd.clear();

 digitalWrite(trigger,LOW);

 delayMicroseconds(2);

 digitalWrite(trigger,HIGH);

 delayMicroseconds(10);

 digitalWrite(trigger,LOW);

 delayMicroseconds(2);

 time=pulseIn(echo,HIGH);

  

   

 distance= time*0.0344 / 2;

  SUM = SUM - READINGS[INDEX];

  READINGS[INDEX] = distance;           // Add the newest reading to the window

  SUM = SUM + distance;                 // Add the newest reading to the sum

  INDEX = (INDEX+1) % WINDOW_SIZE;   // Increment the index, and wrap to 0 if it exceeds the window size

 

  AVERAGED = SUM / WINDOW_SIZE;

  Serial.println(distance);

  Serial.println(AVERAGED);

 lcd.clear();

 lcd.print("Dist.:");

 lcd.print(AVERAGED);

 lcd.print("cm");

 lcd.setCursor(0,1);

 lcd.print("Dist.:");

 lcd.print(AVERAGED*0.394);

 lcd.print("in");

 delay(1000);

 

}