// Hardibay : Monitoring level air menggunakan sensor ultrasonik berbasis blynk

#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL6Avg3GvNM"
#define BLYNK_TEMPLATE_NAME "Pendeteksi Ketinggian Air Hujan"
#define BLYNK_AUTH_TOKEN "yg097rDw1NlwUkphAYe5riXef-4nUwue"

#include <WiFi.h>
#include <Wire.h>
#include <BlynkSimpleEsp32.h>

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST"; 
char pass[] = "";

#define triggerPin 2
#define echoPin 15
#define LED1 25
#define LED2 26
#define LED3 27
#define BUZZER_PIN 18 // Pin untuk buzzer
long durasi;
int jarak;

void setup() {
  Blynk.begin(auth, ssid, pass);
  {
    Serial.print(".");
    delay(500);
  }
  pinMode(triggerPin, OUTPUT); 
  pinMode(LED1, OUTPUT); 
  pinMode(LED2, OUTPUT); 
  pinMode(LED3, OUTPUT); 
  pinMode(BUZZER_PIN, OUTPUT); // Inisialisasi pin buzzer
  pinMode(echoPin, INPUT);
  
  Serial.begin(9600); 
}

void loop() {
  Blynk.run();
  digitalWrite(triggerPin, LOW);
  delayMicroseconds(2);
  digitalWrite(triggerPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(triggerPin, LOW);
  durasi = pulseIn(echoPin, HIGH);
  jarak = durasi * 0.034 / 2;
  Blynk.virtualWrite(V3, jarak);
  
  Serial.print("Jarak: ");
  Serial.print(jarak);
  Serial.println(" cm");

  if (jarak > 80) {
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, LOW);
    digitalWrite(LED3, LOW);
    tone(BUZZER_PIN, 1000); // Matikan buzzer jika jarak > 80 cm
  } else if (jarak <= 80 && jarak >= 40) {
    digitalWrite(LED2, HIGH);
    digitalWrite(LED1, LOW);
    digitalWrite(LED3, LOW);
    noTone(BUZZER_PIN); // Matikan buzzer jika 40 cm < jarak <= 80 cm
  } else if (jarak < 40) {
    digitalWrite(LED3, HIGH);
    digitalWrite(LED2, LOW);
    digitalWrite(LED1, LOW);
    noTone(BUZZER_PIN);
    // Aktifkan buzzer jika jarak < 40 cm
     // Atur frekuensi buzzer
  }
}