// #define BLYNK_TEMPLATE_ID "TMPL6owEBDgWa"
// #define BLYNK_TEMPLATE_NAME "UAP"
// #define BLYNK_AUTH_TOKEN "dlPKyycmdwqwzK0-ssYnaWJChVyhtpAp"

// #include <ESP8266WiFi.h>
// #include <BlynkSimpleEsp8266.h>

// WiFi Credentials
// char ssid[] = "zachriek";
// char pass[] = "bn4jxzju";

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

LiquidCrystal_I2C lcd(0x27, 16, 2); // SDA = A4, D2 | SDL = A5, D1

#define SENSOR_GAS_PIN A0
#define RED_LED_PIN 4 // D2
#define GREEN_LED_PIN 3 // D1
#define BUZZER_PIN 5 // D6
#define WATER_PUMP_PIN 6 // D7

// Ambang batas sensor gas
#define SENSOR_THRESHOLD 400

void setup() {
  Serial.begin(9600);

  pinMode(SENSOR_GAS_PIN, INPUT);
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(WATER_PUMP_PIN, OUTPUT);

  // Blynk.begin(auth, ssid, pass);

  lcd.init();
  lcd.backlight();

  lcd.setCursor(0, 0);
  lcd.print("KELOMPOK 2A");
  lcd.setCursor(0, 1);
  lcd.print("Taufik Zachrie Zira");

  delay(1000);

  for (int lcdPosition = 0; lcdPosition < 20; lcdPosition++) {
    lcd.scrollDisplayLeft();
    delay(300);
  }

  lcd.clear();
}

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

  int gasValue = analogRead(SENSOR_GAS_PIN);
  Serial.print("Gas Value: ");
  Serial.println(gasValue);

  lcd.setCursor(0, 0);
  lcd.print("Kondisi Ruangan:");

  if (gasValue > SENSOR_THRESHOLD) {
    lcd.setCursor(0, 1);
    lcd.print("GAS BOCOR!");

    digitalWrite(RED_LED_PIN, HIGH);
    digitalWrite(GREEN_LED_PIN, LOW);
    digitalWrite(WATER_PUMP_PIN, HIGH);
    tone(BUZZER_PIN, 750, 1000);
    // Blynk.virtualWrite(V0, 1);
  } else {
    lcd.setCursor(0, 1);
    lcd.print("GAS AMAN!");
    
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, HIGH);
    digitalWrite(WATER_PUMP_PIN, LOW);
    noTone(BUZZER_PIN);
    // Blynk.virtualWrite(V0, 0);
  }

  delay(1000);
}