#define BLYNK_TEMPLATE_ID "TMPL6cUAkZbPx"
#define BLYNK_TEMPLATE_NAME "Proyek Fermentasi Pintar Tempe"
#define BLYNK_AUTH_TOKEN "5NMSR6O-3So8tfbFaW8qU5EfYl_nLHiU"


#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>

// WiFi credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// DHT sensor
#define DHTPIN 15
#define DHTTYPE DHT22
DHT dht (DHTPIN, DHTTYPE);

// pH sensor (simulated with potentiometer) 
#define PHPIN 34

// LCD
LiquidCrystal_I2C lcd (0x27, 16, 2);

// Relay pin
#define RELAYPIN 13

// Blynk virtual pins
#define VPIN_TEMPERATURE V0  // Sebelumnya V1
#define VPIN_HUMIDITY V1     // Sebelumnya V0
#define VPIN_PH V2
#define VPIN_RELAY V3

void setup() {
  Serial.begin(115200);
  dht.begin();
  pinMode (RELAYPIN, OUTPUT); 
  digitalWrite(RELAYPIN, LOW);

  lcd.init(); // Initialize the LCD 
  lcd.backlight(); // Turn on the LCD backlight

  // Welcome message with scrolling text
  lcd.setCursor (0, 0);
  lcd.print ("Welcome to Smart");
  lcd.setCursor(0,1);
  lcd.print ("Tempe Fermentation");
  delay(2000); // Delay to show the full message initially 
  for (int i=0; i<16; i++) {
    lcd.scrollDisplayLeft(); // Scroll text to the left 
    delay (300); // Delay 0.3 second between scroll steps
  }
  lcd.clear();

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    lcd.setCursor (0, 0);
    lcd.print ("Connecting to");
    lcd.setCursor (0, 1);
    lcd.print ("WiFi...");
    for (int i = 0; i <16; i++) {
      lcd.scrollDisplayLeft(); // Scroll text to the left 
      delay (300); // Delay 0.3 second between scroll steps
    }
    lcd.clear(); 
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }


  Serial.println("Connected to WiFi");
  lcd.setCursor (0, 0);
  lcd.print ("Connected to WiFi");
  for (int i = 0; i <16; i++) {
    lcd.scrollDisplayLeft(); // Scroll text to the left 
    delay (300); // Delay 0.3 second between scroll steps
  }
  lcd.clear();

  Blynk.begin (BLYNK_AUTH_TOKEN, ssid, password);
}

void loop() {
  Blynk.run();
  float temperature = dht.readTemperature ();
  float humidity = dht.readHumidity();
  int phValue = analogRead (PHPIN);
  float ph = (phValue / 4095.0 )*14.0; // simulate pH scale from 0 to 14

  Blynk.virtualWrite (VPIN_TEMPERATURE, temperature); 
  Blynk.virtualWrite (VPIN_HUMIDITY, humidity);
  Blynk.virtualWrite (VPIN_PH, ph);

  lcd.setCursor(0, 0);
  lcd.print ("Temp: "); 
  lcd.print (temperature);
  lcd.print ("C");
  lcd.setCursor (0, 1);
  lcd.print ("Hum: ");
  lcd.print (humidity);
  lcd.print ("%");

  delay(2000); 
  lcd.clear();

  Serial.print("Temperature: "); 
  Serial.print(temperature);
  Serial.print(" °C, Humidity: ");
  Serial.print (humidity); 
  Serial.print("%, pH: "); 
  Serial.println(ph);

  if (temperature < 30.0) {
    digitalWrite (RELAYPIN, HIGH); // Turn on relay to activate heater
    Blynk.virtualWrite (VPIN_RELAY, 1);
    lcd.setCursor (0, 0);
    lcd.print ("Heater On");
  } else {
    digitalWrite (RELAYPIN, LOW); // Turn off relay 
    Blynk.virtualWrite (VPIN_RELAY, 0);
    lcd.setCursor(0, 0);
    lcd.print ("Heater Off");
  }

  delay(2000);
}

BLYNK_WRITE(VPIN_RELAY) {
  int relayState = param.asInt();
  digitalWrite(RELAYPIN, relayState);
}