#define BLYNK_TEMPLATE_ID "TMPL6zwN3HJiO"
#define BLYNK_TEMPLATE_NAME "HCSR04 DS18B20"
#define BLYNK_AUTH_TOKEN "eWvsn4QwRABF5sqKpGKRRDyeckyw_MAG"

#include <Wire.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <LiquidCrystal_I2C.h>
#include <BlynkSimpleEsp32.h>

#define TRIG_PIN 33        // Pin untuk Trigger HC-SR04
#define ECHO_PIN 25        // Pin untuk Echo HC-SR04
#define DS18B20_PIN 14     // Pin untuk DS18B20
#define RELAY_PIN 32       // Pin untuk Relay
#define BUZZER_PIN 2       // Pin untuk Buzzer
#define LED_PIN 15         // Pin untuk LED

// Token autentikasi Blynk
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

OneWire oneWire(DS18B20_PIN); // Inisialisasi objek OneWire
DallasTemperature sensors(&oneWire); // Inisialisasi objek DallasTemperature
LiquidCrystal_I2C lcd(0x27, 16, 2); // Inisialisasi LCD I2C dengan alamat 0x27, 16 kolom, 2 baris

void setup() {
  Wire.begin(21, 22);
  delay(200);
  lcd.init();
  lcd.backlight();
  lcd.print("LCD MANTAP!");
  delay(1000);

  Serial.begin(115200);
  Serial.println("System Initialized");
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);
  
  lcd.begin(16, 2); // Inisialisasi LCD dengan 16 kolom dan 2 baris
  sensors.begin(); // Inisialisasi sensor suhu
  Blynk.begin(auth, ssid, pass); // Ganti dengan SSID dan password Wi-Fi Anda
}

void loop() {
  // Mengukur jarak menggunakan HC-SR04
  long distance = measureDistance();
  
  // Mengambil suhu dari DS18B20
  sensors.requestTemperatures();
  float temperature = sensors.getTempCByIndex(0);
  
  // Menampilkan jarak dan suhu di LCD
  lcd.clear();
  lcd.print("Jarak: ");
  lcd.print(distance);
  lcd.print(" cm");
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");
  lcd.setCursor(0, 1);
  lcd.print("Suhu: ");
  lcd.print(temperature);
  lcd.print(" C");
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  // Mengirim data ke Blynk
  Blynk.virtualWrite(V0, distance); // Kirim jarak ke Blynk (V0)
  Blynk.virtualWrite(V1, temperature); // Kirim suhu ke Blynk (V1)

  // Mengendalikan LED, Buzzer, dan Relay berdasarkan jarak dan suhu
  if (distance < 100) { // Jika jarak kurang dari 100 cm
    digitalWrite(LED_PIN, HIGH); // Nyalakan LED
    tone(BUZZER_PIN, 1000); // Nyalakan Buzzer
    digitalWrite(RELAY_PIN, HIGH); // Nyalakan Relay
  } else {
    digitalWrite(LED_PIN, LOW); // Matikan LED
    noTone(BUZZER_PIN); // Matikan Buzzer
    digitalWrite(RELAY_PIN, LOW); // Matikan Relay
  }

  if (temperature > 35) { // Jika suhu lebih dari 35 derajat Celsius
    digitalWrite(LED_PIN, HIGH); // Nyalakan LED
    digitalWrite(RELAY_PIN, HIGH); // Nyalakan Relay
   } else {
    digitalWrite(LED_PIN, LOW); // Matikan LED
    digitalWrite(RELAY_PIN, LOW); // Matikan Relay
    noTone(BUZZER_PIN); // Matikan Buzzer
  }

  delay(1000); // Delay 1 detik

  Blynk.run();  // Call this function to keep Blynk running
}

long measureDistance() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  
  long duration = pulseIn(ECHO_PIN, HIGH);
  long distance = (duration * 0.034) / 2; // Menghitung jarak dalam cm
  return distance;
}
// BLYNK_WRITE for controlling the LED from Blynk app
BLYNK_WRITE(V2) {
  int pinValue = param.asInt(); // Get the value from virtual pin V2 (Button widget)

  if (pinValue == 1) {  // If button is pressed
    digitalWrite(LED_PIN, HIGH);  // Turn on the LED
    Serial.println("LED ON via Blynk");
  } else {  // If button is released
    digitalWrite(LED_PIN, LOW);  // Turn off the LED
    Serial.println("LED OFF via Blynk");
  }
}