Arduino Security System

1//feel free to contact
2//sreeramaj53@gmail.com
3//www,youtube.com/ZenoModiff
4
5#include  <Wire.h>
6#include <Keypad.h>                 
7#include <LiquidCrystal_I2C.h>
8#include<EEPROM.h>
9LiquidCrystal_I2C  liquid_crystal_display(0x3F, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
10
11char password[4];
12
13char  initial_password[4],new_password[4];
14
15int i=0;
16
17int Led_pin = 12;
18
19char  key_pressed=0;
20
21const byte rows = 4; 
22const byte columns = 4; 
23
24char  hexaKeys[rows][columns] = {
25
26{'1','2','3','A'},
27
28{'4','5','6','B'},
29
30{'7','8','9','C'},
31
32{'*','0','#','D'}
33
34};
35
36byte  row_pins[rows] = {5,4,3,2};
37
38byte column_pins[columns] = {6,7,8,9};   
39
40Keypad  keypad_key = Keypad( makeKeymap(hexaKeys), row_pins, column_pins, rows, columns);
41
42byte  locked[8] = { 
43  B01110,
44  B01010,
45  B01010,
46  B01010,
47  B11111,
48  B11111,
49  B11111,
50  B00000,
51};
52byte unlocked[8] = { 
53  B01110,
54  B01010,
55  B00010,
56  B00010,
57  B11111,
58  B11111,
59  B11111,
60  B00000,
61};
62
63byte  key[8] = {
64  B11111,
65  B10001,
66  B10001,
67  B11111,
68  B00100,
69  B01100,
70  B00100,
71  B01100
72};
73
74void setup()
75
76{
77
78  pinMode(Led_pin,  OUTPUT);
79
80  liquid_crystal_display.begin(16,2);
81  liquid_crystal_display.createChar(0,  locked);
82  liquid_crystal_display.createChar(1, unlocked);
83  liquid_crystal_display.createChar(2,  key);
84
85  liquid_crystal_display.setCursor(1,0);
86
87  liquid_crystal_display.print("  ZenoModiff");
88
89  liquid_crystal_display.setCursor(0,1);
90
91  liquid_crystal_display.write(byte(2));
92  
93  liquid_crystal_display.print(" Arduino Lock ");
94
95  liquid_crystal_display.write(byte(2));
96
97  delay(2000);
98
99  liquid_crystal_display.clear();
100
101  liquid_crystal_display.print("  Enter Password");
102
103  liquid_crystal_display.setCursor(0,1);
104
105  initialpassword();
106
107}
108
109
110
111
112void  loop()
113
114{
115
116  digitalWrite(Led_pin, LOW);
117
118  key_pressed = keypad_key.getKey();
119
120  if(key_pressed=='#')
121
122    change();
123
124  if (key_pressed)
125
126  {
127
128    password[i++]=key_pressed;
129
130    liquid_crystal_display.print(key_pressed);
131
132      }
133
134  if(i==4)
135
136  {
137
138    delay(200);
139
140    for(int j=0;j<4;j++)
141
142      initial_password[j]=EEPROM.read(j);
143
144    if(!(strncmp(password, initial_password,4)))
145
146    {
147
148      liquid_crystal_display.clear();
149
150      liquid_crystal_display.print("  Pass Accepted");
151
152      liquid_crystal_display.setCursor(7,1);
153
154      liquid_crystal_display.write(byte(1));
155
156     
157      digitalWrite(Led_pin, HIGH);
158
159      delay(2000);
160
161      liquid_crystal_display.clear();
162
163      liquid_crystal_display.setCursor(0,1);
164
165      liquid_crystal_display.print("Pres  # to change");
166
167      delay(2000);
168
169      liquid_crystal_display.clear();
170
171      liquid_crystal_display.print(" Enter Password:");
172
173      liquid_crystal_display.setCursor(0,1);
174
175      i=0;
176
177
178
179
180    }
181
182    else
183
184    {
185
186      digitalWrite(Led_pin,  LOW);
187
188
189
190
191      liquid_crystal_display.clear();
192
193      liquid_crystal_display.print("  Wrong Password");
194
195      liquid_crystal_display.setCursor(7,1);
196
197      liquid_crystal_display.write(byte(0));
198      
199      delay(2000);
200
201      liquid_crystal_display.clear();
202
203      liquid_crystal_display.setCursor(0,1);
204
205      liquid_crystal_display.print("Pres  # to change");
206
207      delay(2000);
208
209      liquid_crystal_display.clear();
210
211      liquid_crystal_display.print(" Enter Password:");
212
213      liquid_crystal_display.setCursor(0,1);
214
215      i=0;
216
217
218
219
220
221    }
222
223  }
224
225}
226
227void change()
228
229{
230
231  int j=0;
232
233  liquid_crystal_display.clear();
234
235  liquid_crystal_display.print("Current  Password");
236
237  liquid_crystal_display.setCursor(0,1);
238
239  while(j<4)
240
241  {
242
243    char key=keypad_key.getKey();
244
245    if(key)
246
247    {
248
249      new_password[j++]=key;
250
251      liquid_crystal_display.print(key);
252
253       
254
255    }
256
257    key=0;
258
259  }
260
261  delay(500);
262
263
264
265
266  if((strncmp(new_password, initial_password, 4)))
267
268  {
269
270    liquid_crystal_display.clear();
271
272    liquid_crystal_display.print("Wrong Password");
273
274    liquid_crystal_display.setCursor(0,1);
275
276    liquid_crystal_display.print("Try Again");
277
278    delay(1000);
279
280  }
281
282  else
283
284  {
285
286    j=0;
287
288    liquid_crystal_display.clear();
289
290    liquid_crystal_display.print("New Password:");
291
292    liquid_crystal_display.setCursor(0,1);
293
294    while(j<4)
295
296    {
297
298      char key=keypad_key.getKey();
299
300      if(key)
301
302      {
303
304        initial_password[j]=key;
305
306        liquid_crystal_display.print(key);
307
308        EEPROM.write(j,key);
309
310        j++;
311
312     
313
314      }
315
316    }
317
318    liquid_crystal_display.print("Pass Changed");
319
320    delay(1000);
321
322  }
323
324  liquid_crystal_display.clear();
325
326  liquid_crystal_display.print("Enter  Password");
327
328  liquid_crystal_display.setCursor(0,1);
329
330  key_pressed=0;
331
332}
333
334
335
336
337void  initialpassword(){
338
339  for(int j=0;j<4;j++)
340
341    EEPROM.write(j, j+49);
342
343  for(int j=0;j<4;j++)
344
345    initial_password[j]=EEPROM.read(j);
346
347}
348
349
350  //    Coded With <3 ZenoModiff 
351 //    sreeramzeno@gmail.com
352 //    www.youtube.com/ZenoModiff