#define TRIG_PIN 3  // GPIO 03 del XIAO ESP32C3
#define ECHO_PIN 2  // GPIO 02 del XIAO ESP32C3

void setup() {
  Serial.begin(115200);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
}

void loop() {
  // Enviar pulso ultrasónico
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  // Medir duración del pulso de eco
  long duration = pulseIn(ECHO_PIN, HIGH);

  // Calcular distancia (en cm)
  float distance = duration * 0.034 / 2;

  Serial.print("Distancia: ");
  Serial.print(distance);
  Serial.println(" cm");

  delay(500);
}
void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}