int trig = 7;
int echo = 6;
float distance;

void setup() {
  Serial.begin(115200);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
}

void loop() {
  
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);

 
  int duration = pulseIn(echo, HIGH);
  Serial.print("CM: ");
  Serial.println(duration / 58);

  delay(1000);
}