Door Lock System with Arduino

1#include<Keypad.h> // KEYPAD LIBRARY FOR KEYPAD INTERFACING 
2#include<LiquidCrystal.h>
3  // LIBRARY FOR LCD INTERFACING
4#include<Servo.h>// LIBRARY FOR SERVO MOTOR
5//#include<String.h>
6#define
7  buzzer 20 // DEFINING PIN FOR BUZZER.
8
9LiquidCrystal lcd(14,15,16,17,18,19);
10  // PINS FOR LCD
11
12char keys[4][4]={ // LAYOUT OF KEYPAD
13 {'1','2','3','A'},
14
15  {'4','5','6', 'B'},
16 {'7','8','9', 'C'},
17 {'*','0','#', 'D'}};
18 
19byte
20  rowPin[4]={4,5,6,7}; // ROW PINS OF KEYPAD
21byte colPin[4]={8,9,10,11}; // COLUMN
22  PINS OF KEYPAD
23
24Servo servo_Motor; 
25String password = "159";  // SETTING
26  DEFAULT PASSWORD.
27int position = 0; // VARIABLE FOR DETERMINING THE POSITION.
28
29int
30  wrong = 0; // VARIABLE FOR CALCULATING THE WRONG INPUT.
31
32int redPin = 9; //
33  DEFINING PIN FOR RED LED
34int greenPin = 8; // DEFINING PIN FOR GREEN LED
35
36  
37Keypad keypad=Keypad(makeKeymap(keys),rowPin,colPin,4,4);
38// MAPPING THE
39  KEYPAD.
40
41
42int total = 0; // VARIABLE TO DETERMINE THE NUMBER OF WRONG ATTEMPTS.
43
44void
45  setup()
46{
47 pinMode(redPin,OUTPUT);
48 pinMode(greenPin,OUTPUT);
49 
50lcd.begin(16,2);
51lcd.print("DOOR
52  LOCK SYSTEM");
53lcd.setCursor(0,2);
54lcd.print("       BY:");
55delay(2000);
56lcd.clear();
57lcd.print("Creative");
58lcd.setCursor(0,2);
59lcd.print("
60    Engineer");
61delay(2000);
62lcd.clear();
63servo_Motor.attach(3);
64setLocked(true);
65delay(1000);
66
67pinMode(buzzer,
68  OUTPUT);
69}
70
71void loop()
72{
73  
74  lcd.clear();
75  lcd.print("Enter
76  Password:");
77  delay(100);
78  
79 char pressed=keypad.getKey();// TAKING
80  THE INPUT FROM KEYPAD
81 String key[3];
82  
83 if(pressed) // IF THE KEY IS
84  PRESSED
85 {
86  lcd.clear();
87  lcd.print("Enter Password:");
88  lcd.setCursor(position,2);
89
90  lcd.print(pressed);
91  delay(500);
92    if(pressed == '*' || pressed == '#')
93
94      {
95          position = 0;
96          setLocked(true);
97          lcd.clear();
98
99      }
100
101    else if(pressed == password[position])
102      {
103          key[position]=pressed;
104
105          position++;
106      }
107 
108    else if (pressed != password[position]
109  )
110      {// IN CASE OF WRONG INPUT INCREMENT BOTH WRONG AND POSITION.
111          wrong++;
112
113          position ++;
114      }
115
116    if(position == 3)
117      {// WHEN
118  POSITION == 3 THEN CHECK THE FOLLOWING
119          if( wrong >0) // IF ANY WRONG
120  INPUT IF GIVEN THEN INCREMENT TOTAL AND
121          // SET WRONG AND POSITION TO
122  ZERO.
123            {
124                total++;
125                wrong = 0;
126
127                position = 0;
128                lcd.clear();
129                lcd.print("WRONG");
130
131                lcd.setCursor(5,2);
132                lcd.print("PASSWORD");
133
134                delay(1000);
135                setLocked(true);
136            }
137
138
139          else if(position == 3 && wrong == 0)
140            {// IF NO WRONG VALUE
141  IS GIVEN THEN DISPLAY THE ACCEPTED PASSWORD AND
142              // MOVE THE SERVO
143  MOTOR.
144                position = 0;
145                wrong = 0;
146                lcd.clear();
147
148                lcd.print("PASSWORD");
149                lcd.setCursor(6,2);
150
151                lcd.print("ACCEPTED");
152                delay(2000);
153                lcd.clear();
154
155                lcd.print("Door Open");
156                delay(2000);
157                setLocked(false);
158
159            }
160
161          if(total ==3)// IF TOTAL OF 3 ATTEMPTS ARE DONE BY
162  ENTERING WRONG PASS
163          //WORD THEN SOUND A BUZZER AND SET TOTAL TO 0.
164
165            {
166                total=0;
167                buzzer_beep();
168
169                delay(500);
170            }
171
172        }
173
174   }
175
176
177   
178}
179
180void setLocked(int locked)// FUNCTION TO CHANGE STATUS OF SERVO
181  MOTOR.
182  {
183    if (locked)
184      {
185          digitalWrite(redPin, HIGH);
186
187          digitalWrite(greenPin, LOW);
188          delay(1000);
189          servo_Motor.attach(3);
190
191          servo_Motor.write(10);
192          delay(1000);
193          servo_Motor.detach();
194
195      }
196    else
197      {
198          digitalWrite(redPin, LOW);
199          digitalWrite(greenPin,
200  HIGH);
201          delay(1000);
202          servo_Motor.attach(3);
203          servo_Motor.write(90);
204
205          delay(1000);
206          servo_Motor.detach();
207      }
208  }
209void
210  buzzer_beep()// FUNCTION TO BEEP THE BUZZER.
211{
212   digitalWrite(buzzer,HIGH);
213
214   delay(1000);
215   digitalWrite(buzzer,LOW);
216   delay(1000);
217   lcd.clear();
218
219   lcd.setCursor(16,0);
220   lcd.print("Subscribe Channel");
221   lcd.setCursor(16,1);
222
223   lcd.print("For More Videos");
224   delay(2000);
225   while(1)
226   {
227
228   lcd.scrollDisplayLeft();
229   delay(200);
230   }
231}
232
233//IF VIDEO WAS
234  HELPFUL THE DO LIKE COMMENT AND SUBSCRIBE THE CHANNEL. ALSO SHARE THE 
235//VIDEO
236  SO THAT OTHERS CAN ALSO LEARN NEW THINGS.
237

1#include<Keypad.h> // KEYPAD LIBRARY FOR KEYPAD INTERFACING 
2#include<LiquidCrystal.h>  // LIBRARY FOR LCD INTERFACING
3#include<Servo.h>// LIBRARY FOR SERVO MOTOR
4//#include<String.h>
5#define  buzzer 20 // DEFINING PIN FOR BUZZER.
6
7LiquidCrystal lcd(14,15,16,17,18,19);  // PINS FOR LCD
8
9char keys[4][4]={ // LAYOUT OF KEYPAD
10 {'1','2','3','A'},
11  {'4','5','6', 'B'},
12 {'7','8','9', 'C'},
13 {'*','0','#', 'D'}};
14 
15byte  rowPin[4]={4,5,6,7}; // ROW PINS OF KEYPAD
16byte colPin[4]={8,9,10,11}; // COLUMN  PINS OF KEYPAD
17
18Servo servo_Motor; 
19String password = "159";  // SETTING  DEFAULT PASSWORD.
20int position = 0; // VARIABLE FOR DETERMINING THE POSITION.
21
22int  wrong = 0; // VARIABLE FOR CALCULATING THE WRONG INPUT.
23
24int redPin = 9; //  DEFINING PIN FOR RED LED
25int greenPin = 8; // DEFINING PIN FOR GREEN LED
26  
27Keypad keypad=Keypad(makeKeymap(keys),rowPin,colPin,4,4);
28// MAPPING THE  KEYPAD.
29
30
31int total = 0; // VARIABLE TO DETERMINE THE NUMBER OF WRONG ATTEMPTS.
32
33void  setup()
34{
35 pinMode(redPin,OUTPUT);
36 pinMode(greenPin,OUTPUT);
37 
38lcd.begin(16,2);
39lcd.print("DOOR  LOCK SYSTEM");
40lcd.setCursor(0,2);
41lcd.print("       BY:");
42delay(2000);
43lcd.clear();
44lcd.print("Creative");
45lcd.setCursor(0,2);
46lcd.print("    Engineer");
47delay(2000);
48lcd.clear();
49servo_Motor.attach(3);
50setLocked(true);
51delay(1000);
52
53pinMode(buzzer,  OUTPUT);
54}
55
56void loop()
57{
58  
59  lcd.clear();
60  lcd.print("Enter  Password:");
61  delay(100);
62  
63 char pressed=keypad.getKey();// TAKING  THE INPUT FROM KEYPAD
64 String key[3];
65  
66 if(pressed) // IF THE KEY IS  PRESSED
67 {
68  lcd.clear();
69  lcd.print("Enter Password:");
70  lcd.setCursor(position,2);
71  lcd.print(pressed);
72  delay(500);
73    if(pressed == '*' || pressed == '#')
74      {
75          position = 0;
76          setLocked(true);
77          lcd.clear();
78      }
79
80    else if(pressed == password[position])
81      {
82          key[position]=pressed;
83          position++;
84      }
85 
86    else if (pressed != password[position]  )
87      {// IN CASE OF WRONG INPUT INCREMENT BOTH WRONG AND POSITION.
88          wrong++;
89          position ++;
90      }
91
92    if(position == 3)
93      {// WHEN  POSITION == 3 THEN CHECK THE FOLLOWING
94          if( wrong >0) // IF ANY WRONG  INPUT IF GIVEN THEN INCREMENT TOTAL AND
95          // SET WRONG AND POSITION TO  ZERO.
96            {
97                total++;
98                wrong = 0;
99                position = 0;
100                lcd.clear();
101                lcd.print("WRONG");
102                lcd.setCursor(5,2);
103                lcd.print("PASSWORD");
104                delay(1000);
105                setLocked(true);
106            }
107
108          else if(position == 3 && wrong == 0)
109            {// IF NO WRONG VALUE  IS GIVEN THEN DISPLAY THE ACCEPTED PASSWORD AND
110              // MOVE THE SERVO  MOTOR.
111                position = 0;
112                wrong = 0;
113                lcd.clear();
114                lcd.print("PASSWORD");
115                lcd.setCursor(6,2);
116                lcd.print("ACCEPTED");
117                delay(2000);
118                lcd.clear();
119                lcd.print("Door Open");
120                delay(2000);
121                setLocked(false);
122            }
123
124          if(total ==3)// IF TOTAL OF 3 ATTEMPTS ARE DONE BY  ENTERING WRONG PASS
125          //WORD THEN SOUND A BUZZER AND SET TOTAL TO 0.
126            {
127                total=0;
128                buzzer_beep();
129                delay(500);
130            }
131
132        }
133
134   }
135
136   
137}
138
139void setLocked(int locked)// FUNCTION TO CHANGE STATUS OF SERVO  MOTOR.
140  {
141    if (locked)
142      {
143          digitalWrite(redPin, HIGH);
144          digitalWrite(greenPin, LOW);
145          delay(1000);
146          servo_Motor.attach(3);
147          servo_Motor.write(10);
148          delay(1000);
149          servo_Motor.detach();
150      }
151    else
152      {
153          digitalWrite(redPin, LOW);
154          digitalWrite(greenPin,  HIGH);
155          delay(1000);
156          servo_Motor.attach(3);
157          servo_Motor.write(90);
158          delay(1000);
159          servo_Motor.detach();
160      }
161  }
162void  buzzer_beep()// FUNCTION TO BEEP THE BUZZER.
163{
164   digitalWrite(buzzer,HIGH);
165   delay(1000);
166   digitalWrite(buzzer,LOW);
167   delay(1000);
168   lcd.clear();
169   lcd.setCursor(16,0);
170   lcd.print("Subscribe Channel");
171   lcd.setCursor(16,1);
172   lcd.print("For More Videos");
173   delay(2000);
174   while(1)
175   {
176   lcd.scrollDisplayLeft();
177   delay(200);
178   }
179}
180
181//IF VIDEO WAS  HELPFUL THE DO LIKE COMMENT AND SUBSCRIBE THE CHANNEL. ALSO SHARE THE 
182//VIDEO  SO THAT OTHERS CAN ALSO LEARN NEW THINGS.
183