// #define BLYNK_TEMPLATE_ID "TMPL6kDBnhdEs"
// #define BLYNK_TEMPLATE_NAME "Smart Home"
// #define BLYNK_AUTH_TOKEN "_rM5KIJejNwg5VtUH5r_v3DR3xsJwB3e"

#define BLYNK_TEMPLATE_ID "TMPL6cx1Z0uT9"
#define BLYNK_TEMPLATE_NAME "Smart Switch"
#define BLYNK_AUTH_TOKEN "DgQf_gjaPPwGDB3_YCkxhQcZQ07wES6E"

#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);

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

// Potentiometer (gas and flame sensor simulation)
#define GASPIN 34
#define FLAMEPIN 35

// Relay pin
#define RELAYPIN 13

// Speaker dan LED
#define SPEAKERPIN 32
#define LED_INDICATOR_PIN 25
#define LED_LAMP1_PIN 26
#define LED_LAMP2_PIN 27

// Blynk virtual pins
#define VPIN_TEMPERATURE V1
#define VPIN_HUMIDITY V2
#define VPIN_GAS V3
#define VPIN_FLAME V4
#define VPIN_RELAY V5
#define VPIN_LAMP1 V6
#define VPIN_LAMP2 V7

// Timer
BlynkTimer timer;
bool useProject1 = true;  // Flag to switch between projects

void switchProject() {
  if (useProject1) {
    Blynk.config(BLYNK_AUTH_TOKEN);
    Blynk.connect();
    useProject1 = false;
  } else {
    Blynk.config(BLYNK_AUTH_TOKEN);
    Blynk.connect();
    useProject1 = true;
  }
}

void setup() {
  Serial.begin(115200);
  dht.begin();
  pinMode(RELAYPIN, OUTPUT);
  pinMode(GASPIN, INPUT);
  pinMode(FLAMEPIN, INPUT);
  pinMode(SPEAKERPIN, OUTPUT);
  pinMode(LED_INDICATOR_PIN, OUTPUT);
  pinMode(LED_LAMP1_PIN, OUTPUT);
  pinMode(LED_LAMP2_PIN, OUTPUT);
  digitalWrite(RELAYPIN, LOW);
  digitalWrite(SPEAKERPIN, LOW);
  digitalWrite(LED_INDICATOR_PIN, LOW);
  digitalWrite(LED_LAMP1_PIN, LOW);
  digitalWrite(LED_LAMP2_PIN, 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 Home");
  // lcd.setCursor(0, 1);
  // lcd.print("Home");
  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);
 // Blynk.begin(BLYNK_AUTH_TOKEN1, ssid, password);
  Blynk.config(BLYNK_AUTH_TOKEN);
  Blynk.connect();

  // Set the timer to switch between projects every 30 seconds (adjust as needed)
  timer.setInterval(30000L, switchProject);
 
}

BLYNK_WRITE(VPIN_LAMP1) {
  int pinValue = param.asInt();
  digitalWrite(LED_LAMP1_PIN, pinValue);
}

BLYNK_WRITE(VPIN_LAMP2) {
  int pinValue = param.asInt();
  digitalWrite(LED_LAMP2_PIN, pinValue);
}

void loop() {
  Blynk.run();
  timer.run();
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  int gasValue = analogRead(GASPIN);
  int flameValue = analogRead(FLAMEPIN);

  // Limits the potentiometer value in the range 0-1000
  gasValue = constrain(gasValue, 0, 1023);
  flameValue = constrain(flameValue, 0, 1023);

  Blynk.virtualWrite(VPIN_TEMPERATURE, temperature);
  Blynk.virtualWrite(VPIN_HUMIDITY, humidity);
  Blynk.virtualWrite(VPIN_GAS, gasValue);
  Blynk.virtualWrite(VPIN_FLAME, flameValue);

  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(1000);
  lcd.clear();

  lcd.setCursor(0, 0);
  lcd.print("Gas: ");
  lcd.print(gasValue);
  lcd.print("ppm ");
  lcd.setCursor(0, 1);
  lcd.print("Flame: ");
  lcd.print(flameValue);
  lcd.print("ppm ");
  delay(1000);
  lcd.clear();

  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" °C, Humidity: ");
  Serial.print(humidity);
  Serial.print(" %, Gas: ");
  Serial.print(gasValue);
  Serial.print(", Flame: ");
  Serial.println(flameValue);

  if (gasValue > 1000 || flameValue > 1000) {
    digitalWrite(RELAYPIN, HIGH); // Turn on relay
    Blynk.virtualWrite(VPIN_RELAY, 1);
    tone(SPEAKERPIN, 1000); // Activate speaker with 1000 Hz tone
    digitalWrite(LED_INDICATOR_PIN, HIGH); // Turn on indicator LED
    lcd.setCursor(0, 0);
    lcd.print("Alert! Gas/Fire");
  } else {
    digitalWrite(RELAYPIN, LOW); // Turn off relay
    Blynk.virtualWrite(VPIN_RELAY, 0);
    noTone(SPEAKERPIN); // Deactivate speaker
    digitalWrite(LED_INDICATOR_PIN, LOW); // Turn off indicator LED
    lcd.print("Normal! Gas/Fire");
  }

  delay(2000);
  lcd.clear();
}

// Function to control relays from Blynk
BLYNK_WRITE(VPIN_RELAY) {
 int relayState = param.asInt();
 if (relayState == 1) {
    digitalWrite(RELAYPIN, HIGH);
    lcd.setCursor(0, 0);
    lcd.print("Relay On ");
} else {
    digitalWrite(RELAYPIN, LOW);
    lcd.setCursor(0, 0);
    lcd.print("Relay Off ");
 }
}