MX PRACTICAL ULTRASONIC SENSOR

ULTRASONIC SENSOR:

#include<LiquidCrystal.h>

LiquidCrystal LCD(12,11,5,4,3,2);

int trigPin = 7; // Trigger Pin of Ultrasonic Sensor

long echoPin = 6;// Echo Pin of Ultrasonic Sensor

double t=0,h=0,hp=0;

void setup()

{ 

  Serial.begin(9600);

  pinMode(trigPin, OUTPUT);

  pinMode(echoPin, INPUT);

  LCD.begin(16,2);

  //LCD.print("Sensor");

 // Starting Serial Terminal

}

void loop()

{

  digitalWrite(trigPin, LOW);//clears the trigger pin

  delayMicroseconds(2);

  digitalWrite(trigPin, HIGH);// Sets the trigPin i.e digital pin 7 on HIGH state for 10 micro seconds

  delayMicroseconds(10);

  digitalWrite(trigPin, LOW);//clears the trigger pin

  t= pulseIn(echoPin, HIGH);// Reads the echoPin, returns the sound wave travel time in microseconds

  h=t*340/20000;// Calculating the distance

  hp=22.5-h;//hp is total height from the base of the tank to ultrasonic sensor minus the distance detected by the sensor from the water surface  

  LCD.setCursor(0,0);

  LCD.print("     ");

  LCD.setCursor(0,0);

  LCD.print("distance=");

  LCD.print(hp);

  Serial.print("distance=");

  Serial.print(hp);

  Serial.print("cm\n");

  // Prints the distance on the Serial Monitor

  LCD.print("cm\n");

  delay(1000);

}