//pin diagram
'''
Relay 1: GPIO 4
Relay 2: GPIO 5
Relay 3: GPIO 6
Relay 4: GPIO 7
Relay 5: GPIO 8
Relay 6: GPIO 9
Relay 7: GPIO 10
Relay 8: GPIO 11
Gas Sensor: Analog A0
Buzzer: GPIO 12
DHT11: GPIO 2
LCD (I2C SDA): GPIO 21
LCD (I2C SCL): GPIO 22
Fingerprint Sensor (I2C SDA): GPIO 19
Fingerprint Sensor (I2C SCL): GPIO 23
Servo Motor: GPIO 13

'''






//Include the library files
#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL6uk3UjcbZ"
#define BLYNK_TEMPLATE_NAME "My Home"
#define BLYNK_AUTH_TOKEN "jDoo8u8-mP0kUDBxoHjSKOlSk8hjq39-"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <SimpleTimer.h>
#include <DHT.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Adafruit_Fingerprint.h>
#include <Servo.h>




char auth[] = "jDoo8u8-mP0kUDBxoHjSKOlSk8hjq39-";
//Enter your WIFI SSID and password
char ssid[] = "Akib";
char pass[] = "iamnotrobot";



int relay1Pin = 4; // GPIO pin for red LED relay
int relay2Pin = 5; // GPIO pin for blue LED relay
int relay3Pin = 6; // GPIO pin for fan relay
int relay4Pin = 7; // GPIO pin for door lock relay
int relay5Pin = 8; // GPIO pin for relay 5
int relay6Pin = 9; // GPIO pin for relay 6
int relay7Pin = 10; // GPIO pin for relay 7
int relay8Pin = 11; // GPIO pin for relay 8
int gasSensorPin = A0; // Analog pin for gas sensor
int buzzerPin = 12; // GPIO pin for buzzer

#define DHTPIN 2     // GPIO pin for DHT11 sensor
#define DHTTYPE DHT11   // DHT 11

DHT dht(DHTPIN, DHTTYPE);
SimpleTimer timer;
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 columns, 2 rows
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&Wire1, 0x42); // Use Wire1 for fingerprint sensor
Servo doorServo;

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
  pinMode(relay1Pin, OUTPUT);
  pinMode(relay2Pin, OUTPUT);
  pinMode(relay3Pin, OUTPUT);
  pinMode(relay4Pin, OUTPUT);
  pinMode(relay5Pin, OUTPUT);
  pinMode(relay6Pin, OUTPUT);
  pinMode(relay7Pin, OUTPUT);
  pinMode(relay8Pin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  dht.begin();
  lcd.init();
  lcd.backlight();
  Wire1.begin(19, 23); // Start I2C for fingerprint sensor (SDA: GPIO 19, SCL: GPIO 23)
  finger.begin(57600);
  doorServo.attach(13); // Attach servo to pin 13
  timer.setInterval(10000L, sendSensorData); // Send sensor data every 10 seconds
}

void loop() {
  Blynk.run();
  timer.run();
}

void sendSensorData() {
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  Blynk.virtualWrite(V4, humidity); // Virtual Pin V4 for humidity
  Blynk.virtualWrite(V5, temperature); // Virtual Pin V5 for temperature

  int gasValue = analogRead(gasSensorPin);
  Blynk.virtualWrite(V6, gasValue); // Virtual Pin V6 for gas value

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

  if (gasValue > 500) { // Adjust threshold as needed
    Blynk.virtualWrite(V7, "Gas Detected!"); // Virtual Pin V7 for gas warning
    lcd.setCursor(0, 1);
    lcd.print("Warning: Gas!");
    digitalWrite(relay1Pin, HIGH); // Red LED ON
    digitalWrite(buzzerPin, HIGH); // Buzzer ON
  } else {
    Blynk.virtualWrite(V7, "No Gas Detected"); // Virtual Pin V7 for no gas warning
    digitalWrite(relay1Pin, LOW); // Red LED OFF
    digitalWrite(buzzerPin, LOW); // Buzzer OFF
  }
}

// ... Other Blynk functions and relay control functions ...

BLYNK_WRITE(V12) {
  String command = param.asStr();
  
  if (command == "unlock_door") {
    if (fingerprintMatch()) {
      Blynk.virtualWrite(V13, "Door Unlocked");
      doorServo.write(90); // Open the door
      delay(2000);
      doorServo.write(0); // Close the door after 20 seconds
      delay(20000);
      doorServo.write(90); // Close the door after 20 seconds
      delay(2000);
      doorServo.write(0); // Lock the door
      digitalWrite(relay4Pin, HIGH); // Door lock relay ON
    } else {
      Blynk.virtualWrite(V13, "Try Again");
    }
  }
}

bool fingerprintMatch() {
  uint8_t p = finger.getImage();
  if (p != FINGERPRINT_OK) {
    return false;
  }

  p = finger.image2Tz();
  if (p != FINGERPRINT_OK) {
    return false;
  }

  p = finger.fingerFastSearch();
  if (p == FINGERPRINT_OK) {
    return true;
  } else {
    return false;
  }
}

}