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

int triggerPin=7;

int echoPin=7;

float arr[10]={0};// array variable to take 10 samples of echo

float cur_avg=0;

float inches = 0;

float cm = 0;

void setup()

{

Serial.begin(9600);

}

void loop()

{//moving avarage filter take 10 samples and find the avarage

for(int i=0;i<10;i++)

{

pinMode(triggerPin, OUTPUT); // Clear the trigger

digitalWrite(triggerPin, LOW);

delayMicroseconds(2);

// Sets the trigger pin to HIGH state for 10 microseconds

digitalWrite(triggerPin, HIGH);

delayMicroseconds(10);

digitalWrite(triggerPin, LOW);

pinMode(echoPin, INPUT);

arr[i]= pulseIn(echoPin, HIGH);

}

float whole_sum=0;

for(int i=0;i<10;i++)

{

whole_sum+=arr[i];

}

cur_avg=whole_sum/10;

cm = 0.01723 * cur_avg;

inches = (cm / 2.54);

Serial.print(inches);

Serial.println("in, ");

Serial.print(cm);

Serial.println("cm");

}