QuakeEye

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <MPU6050.h>
#include <DHT.h>

#define DHTPIN 7
#define DHTTYPE DHT22
#define BUZZER 12
#define LED 13

LiquidCrystal_I2C lcd(0x27, 16, 2);
MPU6050 mpu;
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Wire.begin();
  lcd.begin(16, 2);
  lcd.backlight();

  pinMode(BUZZER, OUTPUT);
  pinMode(LED, OUTPUT);

  dht.begin();
  mpu.initialize();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("QuakeEye Ready");

for (int i = 0; i < 3; i++) {  

  lcd.setCursor(7, 1);
  lcd.print("O");
  delay(400);

  // half-close
  lcd.setCursor(7, 1);
  lcd.print("-");
  delay(200);

  lcd.setCursor(7, 1);
  lcd.print("_");
  delay(300);
}

lcd.setCursor(7, 1);
lcd.print("O"); 
delay(300);

  lcd.clear();
  unsigned long startTime = millis();
  while (millis() - startTime < 4000) {
    lcd.setCursor(0, 0);
    lcd.print("CALIBRATING.");
    delay(400);
    lcd.setCursor(0, 0);
    lcd.print("CALIBRATING..");
    delay(400);
    lcd.setCursor(0, 0);
    lcd.print("CALIBRATING...");
    delay(400);
    lcd.setCursor(0, 0);
    lcd.print("CALIBRATING   ");
    delay(400);
  }

lcd.clear();
lcd.setCursor(2, 0);  
lcd.print("CALIBRATION");
lcd.setCursor(6, 1);  
lcd.print("DONE");

  for (int i = 0; i < 2; i++) {
    digitalWrite(LED, HIGH);
    tone(BUZZER, 1000);
    delay(300);
    digitalWrite(LED, LOW);
    noTone(BUZZER);
    delay(300);
  }

  lcd.clear();
}

void loop() {
  int16_t ax, ay, az;
  mpu.getAcceleration(&ax, &ay, &az);

  int X = ax / 100;
  int Y = ay / 100;
  int Z = az / 100;

  int hum = (int)dht.readHumidity();
  int temp = (int)dht.readTemperature(); 

  lcd.setCursor(0, 0);
  lcd.print("X:");
  lcd.print(X);
  lcd.print(" Y:");
  lcd.print(Y);
  lcd.print(" Z:");
  lcd.print(Z);
  lcd.print(" ");

  if (X >= 0 && X <= 0 && Y >= 0 && Y <= 0 && Z >= 0 && Z <= 0) 
  {
    noTone(BUZZER);
    digitalWrite(LED, LOW);

    lcd.setCursor(0, 1);
    lcd.print("Safe ");
    lcd.print("H:");
    lcd.print(hum);
    lcd.print("% T:");
    lcd.print(temp);
    lcd.print((char)223); 
    lcd.print("C");
  } 

else {
  tone(BUZZER, 1000);  

  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("EARTHQUAKE");

  String frames[] = {"< ALERT >", "<<ALERT>>", "> ALERT <", ">>ALERT<<"};
  int ledStates[] = {HIGH, HIGH, LOW, LOW};  // LED state for each frame

  for (int i = 0; i < 2; i++) {        // repeat animation twice
    for (int j = 0; j < 4; j++) {
      lcd.setCursor(4, 1);
      lcd.print(frames[j]);
      digitalWrite(LED, ledStates[j]);
      delay(200);
    }
  }

  noTone(BUZZER);  
  delay(100);
}

delay(500);
}