#define BLYNK_TEMPLATE_ID "TMPL39krsjNT-"
#define BLYNK_TEMPLATE_NAME "Fire Detection"
#define BLYNK_AUTH_TOKEN "tU8gZPgZL7vGC2IO3F6H15M-keaih-2J"

#define BLYNK_PRINT Serial

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>
#include <Adafruit_SSD1306.h>


char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST"; // Change your Wifi/ Hotspot Name
char pass[] = ""; // Change your Wifi/ Hotspot Password

BlynkTimer timer;

#define fire 23
#define GREEN 12
#define RED 14
#define buzzer  13
#define OLED_RESET 4
int fire_Val = 0;

WidgetLED led(V1);
Adafruit_MPU6050 mpu;
Adafruit_SSD1306 display(OLED_RESET);
const int threshold = 10.0; // Define the acceleration threshold for earthquake detection

float previousX = 0.0; // Store previous X-axis acceleration value

void setup() //Setup function - only function that is run in deep sleep mode
{
  Serial.begin(115200); //Start the serial output at 9600 baud

  pinMode(GREEN, OUTPUT);
  pinMode(fire, INPUT);
  pinMode(RED, OUTPUT);
  pinMode(buzzer, OUTPUT);
  
  Blynk.begin(auth, ssid, pass);//Splash screen delay
  delay(2000);
  timer.setInterval(500L, mySensor);
  while (!mpu.begin()) {
    Serial.println("MPU6050 not connected!");
    delay(1000);
  }
  Serial.println("MPU6050 ready!");
pinMode(buzzer, OUTPUT);
  // Begin OLED display
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // Use I2C address 0x3C for 128x64 OLED
  display.display(); // Clear the display
  display.setTextSize(1); // Set text size
  display.setTextColor(WHITE); // Set text color to white
}


void loop() //Loop function
{
  Blynk.run();
  timer.run();
  sensors_event_t event;
  mpu.getAccelerometerSensor()->getEvent(&event);

  float currentX = event.acceleration.x; // Get current X-axis acceleration value

  // Detect sudden changes in X-axis acceleration
  if (abs(currentX - previousX) > threshold) {
    // Display earthquake message on OLED
    display.clearDisplay();
    display.setCursor(0, 0);
    display.println("Earthquake detected!");
    display.display();

    // Sound the buzzer to indicate an earthquake
    tone(13, 1000);
    Serial.println("Earthquake detected!");

    // Delay for 5 seconds to prevent the buzzer from sounding continuously
    delay(5000);

    // Stop the buzzer
    noTone(13);

    // Delay for 5 seconds before clearing the OLED display
    delay(5000);
    display.clearDisplay(); // Clear the earthquake message after 5 seconds
  }

  previousX = currentX; // Update previous X-axis acceleration value

  // Delay for 250 milliseconds for continuous monitoring
  delay(250);
}

void mySensor()
{
  fire_Val = digitalRead(fire);

  if (fire_Val == LOW)
  {
    Serial.println("Fire in the House");
   
    Blynk.logEvent("fire_alert", "Fire Detected");
    digitalWrite(GREEN, LOW);
    digitalWrite(RED, HIGH);
    digitalWrite(buzzer, HIGH);
    Blynk.virtualWrite(V0, 1);
    Serial.print("Fire Level: ");
    Serial.println(fire_Val);
    led.on();
  }
  else
  {
    digitalWrite(GREEN, HIGH);
    digitalWrite(RED, LOW);
    digitalWrite(buzzer, LOW);
    Blynk.virtualWrite(V0, 0);
    Serial.print("Fire Level: ");
    Serial.println(fire_Val);
    led.off();
  }
}