#include <ESP32Servo.h>

#define TRIG_PIN 5
#define ECHO_PIN 18
#define SERVO_PIN 13

Servo radarServo;

long readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  long duration = pulseIn(ECHO_PIN, HIGH, 30000);
  if (duration == 0) return -1;

  long cm = duration / 58;
  return cm;
}

void setup() {
  Serial.begin(9600);           // <<< Processing ile aynı
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  radarServo.setPeriodHertz(50);
  radarServo.attach(SERVO_PIN, 500, 2400);
}

void loop() {
  for (int angle = 0; angle <= 180; angle += 2) {
    radarServo.write(angle);
    delay(35);

    long dist = readDistanceCM();
    if (dist < 0) dist = 999;   // ölçüm yoksa uzak göster

    // <<< ÖNEMLİ: '.' ile bitiriyoruz
    Serial.print(angle);
    Serial.print(",");
    Serial.print(dist);
    Serial.print(".");
  }

  for (int angle = 180; angle >= 0; angle -= 2) {
    radarServo.write(angle);
    delay(35);

    long dist = readDistanceCM();
    if (dist < 0) dist = 999;

    Serial.print(angle);
    Serial.print(",");
    Serial.print(dist);
    Serial.print(".");
  }
}