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sketch sensore distanza per Arduino

sketch ARDUINO UNO per realizzare un sensore di distanza con modulo HC-SR04

#define TRIG_PIN 10

#define ECHO_PIN 9

#define sound_pin 7

void setup() {

Serial.begin(9600);

pinMode(sound_pin, OUTPUT);

pinMode(TRIG_PIN, OUTPUT);

pinMode(ECHO_PIN, INPUT);

digitalWrite(TRIG_PIN, LOW);

}

void loop() {

digitalWrite(TRIG_PIN, HIGH);

delayMicroseconds(10);

digitalWrite(TRIG_PIN, LOW);

int tempo = pulseIn(ECHO_PIN, HIGH);

int distanza = 0.03438 * tempo /2;

Serial.println (distanza);

Serial.println (tempo);

delay (500);

}