#define PIN_TRIG 5
#define PIN_ECHO 4
void setup() {
  Serial.begin(115200);
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);
}

void loop() 
{
 digitalWrite(PIN_TRIG, HIGH);
 delayMicroseconds(0);
 digitalWrite(PIN_TRIG, LOW);
 int duration = pulseIn(PIN_ECHO,HIGH);
 Serial.print("distance (in cm) :");
 Serial.println(duration/58);
 Serial.print("distance (in inches) :");
 Serial.println(duration/148);
 delay(1000);
}