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Intruder.ino
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Intruder.ino
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#include <Keypad.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include<EEPROM.h>
#include "ultrasonic.h"
#define buzzerpin 9
const byte ROWS = 4;
const byte COLS = 3;
bool armed=false;
char pass[3] = {};
String passH="";
char initial_password[4];
char new_password[4];
char TypedPassword[4];
char key_pressed = 0;
char hexaKeys[ROWS][COLS] = {
{'1', '2', '3'},
{'4', '5', '6'},
{'7', '8', '9'},
{'*', '0', '#'}
};
byte rowPins[ROWS] = {2, 3, 4, 5};
byte colPins[COLS] = {6, 7, 8};
Ultrasonic ultrasonic(10,11);
LiquidCrystal_I2C lcd(0x3f, 16, 2);
Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);
const int analogInPin = A0; // Analog input pin that the receiver is attached to
long int sensorValue = 0; // value read from the receiver
void setup() {
ultrasonic.initialize();
//initialpassword();
// initialize serial communications at 9600 bps:
Serial.begin(9600);
lcd.begin();
// Turn on the blacklight and print a message.
lcd.backlight();
lcd.print("ALARM SYSTEM");
//initialize the indicator LED:
pinMode(buzzerpin,OUTPUT);
pinMode(13, OUTPUT);
delay(2000);
lcd.clear();
}
void loop() {
sensorValue = ultrasonic.getDistance();
lcd.print("ALARM SYSTEM");
if(armed){
lcd.setCursor(0,1);
lcd.print("SYSTEM ARMED");
}
// print the results to the serial monitor:
Serial.print("\nsensor = ");
Serial.print(sensorValue);
//the threshold found fron analog In Out program was when object is detected, the sensor value is below 100
//set the threshold whihc you get
//the threshold varies for different sets of emitter-receiver pairs
if(sensorValue <14 ){ //checks if object is there or not
digitalWrite(buzzerpin, HIGH);
digitalWrite(13, HIGH);
Serial.print("\nObject Detected");
armed=true;
}
else{
digitalWrite(13, LOW);
Serial.print("\nNo object in Front");
}
//--------------------------------------------
char customKey = customKeypad.getKey();
// //---------------------------------------
if (customKey){
Serial.println(customKey);
if (customKey == '0') {
lcd.clear();
lcd.print("ENTER PASSWORD");
Serial.println("ENTER PASSWORD");
int k = 0;
while (k < 4) {
customKey = customKeypad.getKey();
if (customKey) {
lcd.setCursor(5 + k, 1);
lcd.print("*");
Serial.println(customKey);
pass[k] = customKey;
k++;
}
}
//-----------------------------------
for (int j = 0; j < 4; j++) initial_password[j] = EEPROM.read(j);
if (strncmp(pass, initial_password, 4)) {
lcd.clear();
lcd.print("Wrong password");
lcd.setCursor(3, 1);
lcd.print("Try Again!");
delay(1000);
lcd.clear();
}
//----------------------------------
else{
digitalWrite(buzzerpin,LOW);
Serial.println("DISARMED");
lcd.clear();
lcd.setCursor(0,1);
lcd.print("SYSTEM DISARMED");
armed=false;
delay(3000);
}
}
}
if(customKey=='#') change();
//--------------------------------------------------
//-------------------------------------------------
delay(200);
lcd.clear();
}
void change() {
lcd.clear();
int j = 0;
lcd.print("Current Password");
lcd.setCursor(5, 1);
while (j <= 3) {
char key = customKeypad.getKey();
if (key) {
if (key == '*') {
if (j > 0) {
j--;
lcd.setCursor(5 + j, 1);
lcd.print(" ");
lcd.setCursor(5 + j, 1);
}
else {}
}
else if (key == '#') {
lcd.clear();
lcd.print("Current password");
lcd.setCursor(5, 1);
j = 0;
}
else {
TypedPassword[j++] = key;
lcd.print('*');
}
}
key = 0;
}
j = 0;
delay(100);
for (j = 0; j < 4; j++) initial_password[j] = EEPROM.read(j);
if ((strncmp(TypedPassword, initial_password, 4))) {
lcd.clear();
lcd.print("Wrong Password");
lcd.setCursor(3, 1);
lcd.print("Try Again");
delay(1000);
}
else {
j = 0;
lcd.clear();
lcd.print("New Password:");
lcd.setCursor(5, 1);
while (j < 4) {
char key = customKeypad.getKey();
if (key) {
if (key == '*') {
if (j > 0) {
j--;
lcd.setCursor(5 + j, 1);
lcd.print(" ");
lcd.setCursor(5 + j, 1);
}
else {}
}
else if (key == '#') {
lcd.clear();
lcd.print("New Password:");
lcd.setCursor(5, 1);
j = 0;
}
else {
initial_password[j] = key;
lcd.print('*');
EEPROM.write(j, key);
j++;
}
}
key = 0;
}
lcd.clear();
lcd.print("Password Changed");
lcd.setCursor(2, 1);
lcd.print("Successfully");
delay(2000);
}
key_pressed = 0;
lcd.clear();
}
void initialpassword() { //setting initial password
for (int j = 0; j < 4; j++)
EEPROM.write(j, 48); //address ,value to b stored in byte location
for (int j = 0; j < 4; j++)
initial_password[j] = EEPROM.read(j); //read from the Eeprom
}