#define BLYNK_TEMPLATE_ID "TMPL60L_QiVkB"
#define BLYNK_TEMPLATE_NAME "Ketinggian Air"

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

#define ECHO_PIN 2
#define TRIG_PIN 3
#define buzzer 4
#define merah 13
#define kuning 12
#define hijau 11

char auth[] = "r346WtzZ16js-6ulTWvaZRSYdFSGXfui";  
char ssid[] = "Wokwi-GUEST";       
char pass[] = "";     

LiquidCrystal_I2C lcd(0x27, 20, 4);

//Inisialisasi
void setup() {
  Wire.begin(20, 21);
  pinMode(merah, OUTPUT);
  pinMode(kuning, OUTPUT);
  pinMode(hijau, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(buzzer, OUTPUT);
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  digitalWrite(merah, HIGH);
  digitalWrite(kuning, HIGH);
  digitalWrite(hijau, HIGH);

  // Judul
  tone(4, 300, 500);
  lcd.setCursor(3, 1);
  lcd.print("Alat Mengukur");
  lcd.setCursor(3, 2);
  lcd.print("Ketinggian Air");
  delay(2000);

  // Nama Kelompok
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Kelompok 3");
  lcd.setCursor(0, 1);
  lcd.print("Suryadi");
  lcd.setCursor(0, 2);
  lcd.print("Ichwan");
  lcd.setCursor(0, 3);
  lcd.print("Asmawiah Usman");
  delay(2000);
  digitalWrite(merah, LOW);
  digitalWrite(kuning, LOW);
  digitalWrite(hijau, LOW);
  digitalWrite(buzzer, LOW);
  lcd.clear();

  Serial.print("Connecting to WiFi...");
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("Connected!");

  Blynk.begin(auth, ssid, pass);
  Serial.print("Connecting to Blynk...");
  while (!Blynk.connected()) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("Connected to Blynk!");
}


// Perhitungan Kedalaman
float kedalaman() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int durasi = pulseIn(ECHO_PIN, HIGH);
  return 400 - durasi * 0.034 / 2;
}

// Proses Kondisi
void loop() {
  Blynk.run();

  float jarak = kedalaman();
  Serial.print("Jarak: ");
  Serial.println(jarak);

  Blynk.virtualWrite(V1, jarak); // Mengirim data jarak ke Blynk di V1
  Serial.print("Mengirim jarak ke Blynk: ");
  Serial.println(jarak);

  String status;

  if (jarak > 370) {
    digitalWrite(merah, HIGH);
    digitalWrite(kuning, LOW);
    digitalWrite(hijau, LOW);
    //lcd.clear();
    lcd.setCursor(0, 1);
    lcd.print("Kedalaman :");
    lcd.setCursor(11, 1);
    lcd.print(jarak);
    lcd.setCursor(18, 1);
    lcd.print("cm");
    lcd.setCursor(0, 2);
    lcd.print("Status    :");
    lcd.setCursor(11, 2);
    lcd.print("Bahaya");
    tone(4, 800, 1000);
    delay(1000);
    lcd.clear();
    Blynk.virtualWrite(V2, 255); // Menghidupkan LED merah di Blynk
    Blynk.virtualWrite(V3, 0);   // Mematikan LED kuning di Blynk
    Blynk.virtualWrite(V4, 0);   // Mematikan LED hijau di Blynk
    status = "Bahaya";
  } else if (jarak >= 320 && jarak < 370) {
    digitalWrite(merah, LOW);
    digitalWrite(kuning, HIGH);
    digitalWrite(hijau, LOW);
    //lcd.clear();
    lcd.setCursor(0, 1);
    lcd.print("Kedalaman :");
    lcd.setCursor(11, 1);
    lcd.print(jarak);
    lcd.setCursor(18, 1);
    lcd.print("cm");
    lcd.setCursor(0, 2);
    lcd.print("Status    :");
    lcd.setCursor(11, 2);
    lcd.print("Siaga");
    delay(1000);
    lcd.clear();
    Blynk.virtualWrite(V2, 0);   // Mematikan LED merah di Blynk
    Blynk.virtualWrite(V3, 255); // Menghidupkan LED kuning di Blynk
    Blynk.virtualWrite(V4, 0);   // Mematikan LED hijau di Blynk
    status = "Siaga";
  } else {
    digitalWrite(merah, LOW);
    digitalWrite(kuning, LOW);
    digitalWrite(hijau, HIGH);
    //lcd.clear();
    lcd.setCursor(0, 1);
    lcd.print("Kedalaman :");
    lcd.setCursor(11, 1);
    lcd.print(jarak);
    lcd.setCursor(18, 1);
    lcd.print("cm");
    lcd.setCursor(0, 2);
    lcd.print("Status    :");
    lcd.setCursor(11, 2);
    lcd.print("Aman");
    delay(1000);
    lcd.clear();
    Blynk.virtualWrite(V2, 0);   // Mematikan LED merah di Blynk
    Blynk.virtualWrite(V3, 0);   // Mematikan LED kuning di Blynk
    Blynk.virtualWrite(V4, 255); // Menghidupkan LED hijau di Blynk
    status = "Aman";
  }
  Blynk.virtualWrite(V5, status); // Mengirim status ke Blynk di V5
  Serial.print("Mengirim status ke Blynk: ");
  Serial.println(status);
}