#include <NewPing.h>
#define TRIGGER_PIN 7
#define ECHO_PIN 8
#define MAX_DISTANCE 200 


NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);

void setup() {
  Serial.begin(115200);
}

void loop() {
  delay(50);
  Serial.print("Ping:");
  Serial.print(sonar.ping_cm());
  Serial.println("cm");
}