Quake.ino

#include <BoltDeviceCredentials.h> //Save your API KEY and DEVICE ID in this file, before using this library
#include <BoltIoT-Arduino-Helper.h>
#include<LiquidCrystal.h> // lcd Header

LiquidCrystal lcd(7,6,5,4,3,2); // pins for LCD Connection
 
#define buzzer 12 // buzzer pin
#define led 13 //led pin
 
#define x A0 // x_out pin of Accelerometer
#define y A1 // y_out pin of Accelerometer
#define z A2 // z_out pin of Accelerometer

/*variables*/
int xsample=0;
int ysample=0;
int zsample=0;
long start;
int buz=0;
 
/*Macros*/
#define samples 50
#define maxVal 20 // max change limit
#define minVal -20 // min change limit
#define buzTime 5000 // buzzer on time
 
void setup(){
  lcd.begin(16,2); //initializing lcd
  boltiot.begin(8,9); //Connect Bolt's RX & TX to the 8 and 9 of the Arduino
  Serial.begin(9600);

  delay(500);
  lcd.print("EarthQuake ");
  lcd.setCursor(0,1);
  lcd.print("Detector ");

  delay(1500);

  lcd.clear();
  lcd.print("Calibrating.....");
  lcd.setCursor(0,1);
  lcd.print("Please wait...");

  pinMode(buzzer, OUTPUT);
  pinMode(led, OUTPUT);
  buz=0;
  digitalWrite(buzzer, buz);
  digitalWrite(led, buz);

  for(int i=0;i<samples;i++) // taking samples for calibration
  {
  xsample+=analogRead(x);
  ysample+=analogRead(y);
  zsample+=analogRead(z);
  }
 
  xsample/=samples; // taking avg for x
  ysample/=samples; // taking avg for y
  zsample/=samples; // taking avg for z
 
  delay(3000);
  lcd.clear();
  lcd.print("Calibrated");

  delay(1000);
  lcd.clear();
  lcd.print("Device Ready");

  delay(1000);
  
  lcd.clear();
  lcd.print(" X Y Z ");
  }
  
  String data;
void loop(){
   
  int value1=analogRead(x); // reading x out
  int value2=analogRead(y); //reading y out
  int value3=analogRead(z); //reading z out
   
  int x_value =xsample-value1; // finding change in x
  int y_value=ysample-value2; // finding change in y
  int z_value=zsample-value3; // finding change in z
   
  /*displying change in x,y and z axis values over lcd*/
  lcd.setCursor(0,1);
  lcd.print(x_value );
  lcd.setCursor(6,1);
  lcd.print(y_value);
  lcd.setCursor(12,1);
  lcd.print(z_value);
  delay(100);
   
  /* comparing change with predefined limits*/
  if(x_value  < minVal || x_value  > maxVal || y_value < minVal || y_value > maxVal || z_value < minVal || z_value > maxVal)
  {
    if(buz == 0)
    start=millis(); // timer start
    buz=1; // buzzer / led flag activated
  }
   
  else if(buz == 1) // buzzer flag activated then alerting earthquake
  {
    lcd.setCursor(0,0);
    lcd.print("Earthquake Alert ");
    if(millis()>= start+buzTime)
    buz=0;
  }
   
  else
  {
    lcd.clear();
    lcd.print(" X Y Z ");
  }
   
  digitalWrite(buzzer, buz); // buzzer on and off command
  digitalWrite(led, buz); // led on and off command
  
  /*Open Serial monitor to view the values */
  Serial.print("x=");
  Serial.println(x_value );
  Serial.print("y=");
  Serial.println(y_value);
  Serial.print("z=");
  Serial.println(z_value);
  Serial.println(" $");
  
  boltiot.processPushDataCommand(x_value, y_value, z_value);

}