Project 2 - Measuring the distance of an object using ultrasonic sensor and also smoothen the sensor data using moving average filter
Program working:-
In this program conversion of data coming from ultra sonic sensor is done as well as this data is also smoothen using moving average filter method. A LCD (16 * 2) is also configured which is printing the value of converted data.This program converts the sensor data in centimeters and also in inhes.With the help of Serial communication present in this program user can see smoothen data on serial moniter.
Code:-
#include<LiquidCrystal.h>
LiquidCrystal lcd(12 ,11 ,5 ,4 ,3 ,2); //Define LCD Module Pins (RS,RN,D4,D5,D6,D7)
int window[10] = {0}; // Creating a integer array of 10 element.
int signalPin = 7; // connected signal pin of sensor to pin No.7 of Ardunio
long duration; // Time
long cm; // Centimeters
long inch; // Inches
void setup()
{
Serial.begin(9600);// Initialize serial communication:
lcd.begin(16, 2); // Initialize LCD
}
void loop()
{
pinMode(signalPin, OUTPUT); // Enble pin 7 as output
digitalWrite(signalPin, LOW); // clearing previous data
delayMicroseconds(2); // Micro seconds delay
digitalWrite(signalPin, HIGH); // Triggered by a HIGH pulse
delayMicroseconds(10); // Micro seconds delay
digitalWrite(signalPin, LOW); // Again low
// The same pin is used to read the signal from the PING))):
pinMode(signalPin,INPUT); // Enble pin 7 as input
duration = pulseIn(signalPin,HIGH); //a HIGH pulse duration is the time (in microseconds
cm = duration * 0.0346/2; // conversion
inch = duration * 0.01348/2; // conversion
lcd.setCursor(0, 0); // Setting cursor of LCD
lcd.print(" >>Distance<<"); // Printing this message
lcd.setCursor(0, 1); // Again setting cursor
lcd.print(cm); // Printing converted value i.e. 'Time into Centimeters'
lcd.print(" cm ");
lcd.print(inch);// Printing converted value i.e. 'Time into Inhes'
lcd.print(" inch");
// Now smoothen the sensor data
int current_samp = 0;current_samp = (duration); // duration = current_samp
delayMicroseconds(300); // taking delay
pushVal(current_samp);// calling function
Serial.println(takeAvg()); // calling function
}
void pushVal(int val)
{
int i = 0;
for(i = 1;i < 10; i++)// This for loop run for 10 time
{
window[i-1] = window[i]; // here setting window previous value as window new value
}
window[10 - 1] = val; // finally giving to val
}
int takeAvg() // this funtion is just taking simple avg of 10 element
{
int i = 0;
long sum = 0;
for(i = 0; i < 10; i++) // This for loop is adding 10 element
{
sum += window[i]; //in each cycle sum value is incressing
}
return (sum / 10); // dividing sum with number of element i.e. '10'.
}