#define BLYNK_TEMPLATE_ID "TMPL69WPfSOlI"
#define BLYNK_TEMPLATE_NAME "Fermentasi Tempe Pintar"
#define BLYNK_AUTH_TOKEN "AD2K-uTE9NVFTYqXXP7dZYL0wsOQw0Wk"

#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 V1
#define VPIN_HUMIDITY V2
#define VPIN_PH V3
#define VPIN_RELAY V4

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);
  
}