les2_3_ard

#include<NewPing.h>
#define PIN_TRIG 12
#define PIN_ECHO 11
#define MAX_DISTANCE 250
NewPing sonar(PIN_TRIG, PIN_ECHO, MAX_DISTANCE);
void setup() {
Serial.begin(9600);
}

void loop() {
  delay(50);
  unsigned int distance = sonar.ping_cm();
  if (Serial.available() > 0 ) {
    String data = Serial.readStringUntil('\n');
    Serial.print("You sent me: ");
    Serial.print(data);
    Serial.println(distance);
  }

}