#include <WiFi.h>
#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

const int buzzerPin = 5; // Define buzzer pin
const float threshold = 0.5; // Define earthquake threshold (adjust as needed)
Adafruit_MPU6050 mpu;
LiquidCrystal_I2C LCD(0x27, 20, 4);

float ax, ay, az;
float ax_prev,ay_prev;
bool earthquakeDetected = false;

void setup() {
  Serial.begin(115200);

  LCD.init();
  LCD.backlight();

  WiFi.begin("Wokwi-GUEST", "");
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  LCD.clear();
  LCD.setCursor(0, 0);
  LCD.println("Online");
  LCD.setCursor(0, 1);
  LCD.println("Hi");
  mpu.setAccelerometerRange(MPU6050_RANGE_8_G);
  pinMode(buzzerPin, OUTPUT);
}
void loop() {
  if (!earthquakeDetected) {
    // Check if X and Y axis changes exceed the threshold
    if (abs(ax - ax_prev) > threshold || abs(ay - ay_prev) > threshold) {
      earthquakeDetected = true;
      Serial.println("Earthquake detected!");
      digitalWrite(buzzerPin, HIGH);
      LCD.clear();
      LCD.setCursor(0, 0);
      LCD.println("*** EARTHQUAKE! ***");
      LCD.setCursor(0, 1);
      LCD.println("Seek safe shelter!");
    }
  } else {
    delay(5000);
    earthquakeDetected = false;
    digitalWrite(buzzerPin, LOW);
    LCD.clear();
    LCD.setCursor(0, 0);
    LCD.println("Online");
    LCD.setCursor(0, 1);
    LCD.println("Hi");
  }
  ax_prev = ax;
  ay_prev = ay;
}