Ultrasonic.ino

#include <NewPing.h>
 
#define TRIGGER_PIN  3
#define ECHO_PIN     4
#define MAX_DISTANCE 200
 
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);
 
void setup() {
  Serial.begin(115200);
}
 
void loop() {
  delay(50);
  Serial.println((0.034027/2)*sonar.ping_median(10));
}