#include "SoftwareSerial.h"


// defines pins numbers
#define Rx 1
#define Tx 2

const int trigPin = 3;
const int echoPin = 4;

SoftwareSerial myserial(Rx, Tx);

// defines variables
long duration;
int distance;

void setup() 
{
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin as an Input
  myserial.begin(9600); // Starts the serial communication
  myserial.println("Communicating now");
}
void loop() 
{
  // Clears the trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  // Sets the trigPin on HIGH state for 10 micro seconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration = pulseIn(echoPin, HIGH);
  // Calculating the distance
  distance= duration*0.034/2;
  // Prints the distance on the Serial Monitor
  myserial.print("Distance: ");
  myserial.print(distance);
  myserial.println("cm");
  
}