//Muhammad Raqhib hamdi
//2021230037
//Unsada Teknologi Informasi
//Lab 3.8 ESP 32

//Sensor ultrasonik mengirimkan gelombang suara ke objek, kemudian mengukur waktu yang diperlukan untuk gelombang tersebut dipantulkan kembali. Dengan menggunakan waktu tunda ini, sensor dapat menghitung jarak antara dirinya dan objek.

#define ECHO_PIN 2
#define TRIG_PIN 15

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

float readDistanceCM() {
digitalWrite(TRIG_PIN, LOW);
delayMicroseconds(2);
digitalWrite(TRIG_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIG_PIN, LOW);
int duration = pulseIn(ECHO_PIN, HIGH);
return duration * 0.034 / 2;
}

void loop() {
digitalWrite(TRIG_PIN, LOW);
delayMicroseconds(2);
digitalWrite(TRIG_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIG_PIN, LOW);
int duration = pulseIn(ECHO_PIN, HIGH);
float distance = duration * 0.034 / 2;
//float distance = readDistanceCM();

Serial.print("Jarak: ");
Serial.println(distance);

delay(100);
}