TestaSensor

int distance;
int echoPin;
int trigPin;
long duration;

void setup(){
    Serial.begin(9600);
    pinMode(echoPin, INPUT);
    pinMode(trigPin, OUTPUT);
}

void loop(){
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);
    duration = pulseIn(echoPin, HIGH);
    distance = duration / 58;
    Serial.println(distance);
}