آموزش آردوینو جلسه نهم

const int TRIG_PIN = 12;
const int ECHO_PIN = 13;

void setup() {

     Serial.begin(9600);

     pinMode(TRIG_PIN,OUTPUT);
     pinMode(ECHO_PIN,INPUT);

}
void loop(){

     long duration, distanceCm, distanceIn;

     digitalWrite(TRIG_PIN, LOW);
     delayMicroseconds(2);

     digitalWrite(TRIG_PIN, HIGH);
     delayMicroseconds(10);

     digitalWrite(TRIG_PIN, LOW);

     duration = pulseIn(ECHO_PIN,HIGH);

     distanceCm = duration / 29.1 / 2 ;
     distanceIn = duration / 74 / 2;

     if (distanceCm <= 0){

          Serial.println("Out of range");

     }

     else {

          Serial.print(distanceIn);
          Serial.print("in, ");

          Serial.print(distanceCm);
          Serial.print("cm");
          
          Serial.println();

     }

     delay(1000);

}