Electronic Safe with Arduino

Arduino Safe - 6 digit Passcode

May 20, 2016

•

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69 respects

safe

security

lock

Components and supplies

Breadboard (generic)

Resistor 330 ohm

Servos (Tower Pro MG996R)

Capacitor 100 µF

Jumper wires (generic)

Pushbutton switch 12mm

Standard LCD - 16x2 White on Blue

9V battery (generic)

9V Battery Clip

Arduino UNO

Apps and platforms

Arduino IDE

Project description

Code

arduino

1/* 
2Made by Marco Fusco
3May 20, 2016
4Contact me at: marcofusco111@gmail.com
5*/
6    
7
8#include <LiquidCrystal.h>
9#include <EEPROM.h>
10#include <Servo.h>
11
12int   address = 0;
13static unsigned long SaveTimer;
14static unsigned long SaveDelay   = (30 * 1000); 
15
16
17char CODE[10] = "1234E"; 
18char Str[10]; 
19char   CodeLength = 4;
20int Pos = 0;
21bool Unlocked;
22static unsigned long DisplayTimer;   
23static unsigned long DisplayDelay = 200;
24
25LiquidCrystal lcd(12, 11, 9,   8, 7, 6); 
26
27
28int buttonPin1 = 2;   
29int buttonPin2 = 3;
30int buttonPin3   = 4;
31int buttonPin4 = 5;
32
33int enterbutton = 10; 
34int clearlockbutton   = 13;
35
36Servo myServo;
37
38void setup() {
39
40  myServo.attach(A1);
41   
42  int EEPROMCodeOK = true;
43  for (Pos = 0; Pos <= (CodeLength); Pos++)   {
44    Str[Pos] =  EEPROM.read(Pos);
45    if (!(strrchr("1123456789", Str[Pos])))   { 
46      // not a valid code
47      EEPROMCodeOK = false;
48    }
49  }
50   Pos++;
51  Str[Pos] =  EEPROM.read(Pos); 
52  if (Str[CodeLength + 1] != 'E')   EEPROMCodeOK = false; 
53  if (EEPROMCodeOK) {
54    Str[CodeLength + 2] = '\\0';
55     strncpy(CODE, Str, CodeLength + 1);
56  }
57  ClearCode();
58
59  pinMode(buttonPin1,   INPUT_PULLUP);
60  pinMode(buttonPin2, INPUT_PULLUP);
61  pinMode(buttonPin3,   INPUT_PULLUP);
62  pinMode(buttonPin4, INPUT_PULLUP);
63
64  pinMode(enterbutton,   INPUT_PULLUP);
65  pinMode(clearlockbutton, INPUT_PULLUP);
66
67  lcd.begin(16,   2);
68  lcd.setCursor(0, 0);
69  lcd.print("Hello.");
70  delay(2000);
71   lcd.clear();
72  lcd.setCursor(0, 0);
73  lcd.print("Password:");
74
75   DisplayTimer = millis() + 200;
76}
77
78
79void loop() {
80  
81  Lock();
82   
83  Pos = constrain(Pos, 0, CodeLength);
84
85  int buttonState1 = digitalRead(buttonPin1);   
86  int buttonState2 = digitalRead(buttonPin2);
87  int buttonState3 = digitalRead(buttonPin3);
88   int buttonState4 = digitalRead(buttonPin4);
89
90  int clButtonState = digitalRead(clearlockbutton);
91   int enterButtonState = digitalRead(enterbutton);
92
93  lcd.setCursor(9, 0);
94
95   if (buttonState1 == LOW) {
96    Str[Pos] = '1';
97    Pos++;
98    Str[Pos]   = '\\0';
99    delay(250); 
100    while (digitalRead(buttonPin1) == LOW); 
101
102   }
103
104  else if (buttonState2 == LOW) {
105    Str[Pos] = '2';
106    Pos++;
107     Str[Pos] = '\\0';
108    delay(250); 
109    while (digitalRead(buttonPin2)   == LOW);
110
111  }
112
113  else if (buttonState3 == LOW) {
114    Str[Pos] = '3';
115     Pos++;
116    Str[Pos] = '\\0';
117    delay(250); 
118    while (digitalRead(buttonPin3)   == LOW);
119  }
120
121  else if (buttonState4 == LOW) {
122    Str[Pos] = '4';
123     Pos++;
124    Str[Pos] = '\\0';
125    delay(250); 
126    while (digitalRead(buttonPin4)   == LOW); 
127
128  }
129  else if (enterButtonState == LOW) {
130    Str[Pos] =   'E';
131    Pos++;
132    Str[Pos] = '\\0';
133    delay(250);
134    while (digitalRead(buttonPin1)   == LOW); 
135     if (strcmp (Str,CODE) == 0) {
136      Unlocked = true;
137      lcd.setCursor(0,   0);
138      lcd.print(" Access Granted");
139      delay(2000);
140      lcd.clear();
141       lcd.print("    Unlocked");
142    } 
143    else if (SaveTimer > millis()   && (Pos + 1) == CodeLength) { 
144
145      strcpy(CODE, Str);
146      for (Pos   = 0; Pos <= (CodeLength + 1); Pos++) {
147        EEPROM.write(Pos, Str[Pos]);
148       }
149      lcd.setCursor(0, 0);
150      lcd.print("Saving Code:");
151       lcd.setCursor(0, 1);
152      lcd.print(Str);
153
154      Unlocked = true;
155     }
156
157    else { 
158
159      lcd.clear();
160      lcd.print(" Access   Denied.");
161      delay(2000);
162      lcd.clear();
163      lcd.print("Password:");
164
165     }
166
167    while (Unlocked) {
168      Unlock();
169      if (digitalRead(clearlockbutton)   == LOW) {
170        delay(200);
171        lcd.clear();
172        lcd.print("      Locked");
173        delay(2000);
174        lcd.clear();
175        Unlocked   = false;
176        SaveTimer = millis() + 30000;
177      }
178    }
179    
180     ClearCode();
181
182    
183  }
184
185  else if (clButtonState == LOW) {
186     delay(500);
187
188    while (clearlockbutton == LOW);
189    if ((millis()   - SaveTimer) > 4500) {
190      
191    }
192    
193    ClearCode();
194    
195   }
196
197  if ( (long)( millis() - DisplayTimer ) >= 0) {
198    DisplayTimer   += DisplayDelay;
199    lcd.setCursor(9, 0); 
200    lcd.print(Str);
201    lcd.print("      ");
202
203  }
204}
205
206void ClearCode() {
207  
208  Pos = 0;
209  Str[Pos]   = '\\0';
210  lcd.setCursor(0, 0);
211  lcd.print("Password:");
212  lcd.setCursor(0,   1);
213  lcd.print("          ");
214  
215}
216
217void Unlock() {
218
219  myServo.write(150);
220   
221}
222
223void Lock() {
224
225  myServo.write(50);
226
227}
228
229

/* 
Made by Marco Fusco
May 20, 2016
Contact me at: marcofusco111@gmail.com
*/
    

#include <LiquidCrystal.h>
#include <EEPROM.h>
#include <Servo.h>

int   address = 0;
static unsigned long SaveTimer;
static unsigned long SaveDelay   = (30 * 1000); 


char CODE[10] = "1234E"; 
char Str[10]; 
char   CodeLength = 4;
int Pos = 0;
bool Unlocked;
static unsigned long DisplayTimer;   
static unsigned long DisplayDelay = 200;

LiquidCrystal lcd(12, 11, 9,   8, 7, 6); 


int buttonPin1 = 2;   
int buttonPin2 = 3;
int buttonPin3   = 4;
int buttonPin4 = 5;

int enterbutton = 10; 
int clearlockbutton   = 13;

Servo myServo;

void setup() {

  myServo.attach(A1);
   
  int EEPROMCodeOK = true;
  for (Pos = 0; Pos <= (CodeLength); Pos++)   {
    Str[Pos] =  EEPROM.read(Pos);
    if (!(strrchr("1123456789", Str[Pos])))   { 
      // not a valid code
      EEPROMCodeOK = false;
    }
  }
   Pos++;
  Str[Pos] =  EEPROM.read(Pos); 
  if (Str[CodeLength + 1] != 'E')   EEPROMCodeOK = false; 
  if (EEPROMCodeOK) {
    Str[CodeLength + 2] = '\\0';
     strncpy(CODE, Str, CodeLength + 1);
  }
  ClearCode();

  pinMode(buttonPin1,   INPUT_PULLUP);
  pinMode(buttonPin2, INPUT_PULLUP);
  pinMode(buttonPin3,   INPUT_PULLUP);
  pinMode(buttonPin4, INPUT_PULLUP);

  pinMode(enterbutton,   INPUT_PULLUP);
  pinMode(clearlockbutton, INPUT_PULLUP);

  lcd.begin(16,   2);
  lcd.setCursor(0, 0);
  lcd.print("Hello.");
  delay(2000);
   lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Password:");

   DisplayTimer = millis() + 200;
}


void loop() {
  
  Lock();
   
  Pos = constrain(Pos, 0, CodeLength);

  int buttonState1 = digitalRead(buttonPin1);   
  int buttonState2 = digitalRead(buttonPin2);
  int buttonState3 = digitalRead(buttonPin3);
   int buttonState4 = digitalRead(buttonPin4);

  int clButtonState = digitalRead(clearlockbutton);
   int enterButtonState = digitalRead(enterbutton);

  lcd.setCursor(9, 0);

   if (buttonState1 == LOW) {
    Str[Pos] = '1';
    Pos++;
    Str[Pos]   = '\\0';
    delay(250); 
    while (digitalRead(buttonPin1) == LOW); 

   }

  else if (buttonState2 == LOW) {
    Str[Pos] = '2';
    Pos++;
     Str[Pos] = '\\0';
    delay(250); 
    while (digitalRead(buttonPin2)   == LOW);

  }

  else if (buttonState3 == LOW) {
    Str[Pos] = '3';
     Pos++;
    Str[Pos] = '\\0';
    delay(250); 
    while (digitalRead(buttonPin3)   == LOW);
  }

  else if (buttonState4 == LOW) {
    Str[Pos] = '4';
     Pos++;
    Str[Pos] = '\\0';
    delay(250); 
    while (digitalRead(buttonPin4)   == LOW); 

  }
  else if (enterButtonState == LOW) {
    Str[Pos] =   'E';
    Pos++;
    Str[Pos] = '\\0';
    delay(250);
    while (digitalRead(buttonPin1)   == LOW); 
     if (strcmp (Str,CODE) == 0) {
      Unlocked = true;
      lcd.setCursor(0,   0);
      lcd.print(" Access Granted");
      delay(2000);
      lcd.clear();
       lcd.print("    Unlocked");
    } 
    else if (SaveTimer > millis()   && (Pos + 1) == CodeLength) { 

      strcpy(CODE, Str);
      for (Pos   = 0; Pos <= (CodeLength + 1); Pos++) {
        EEPROM.write(Pos, Str[Pos]);
       }
      lcd.setCursor(0, 0);
      lcd.print("Saving Code:");
       lcd.setCursor(0, 1);
      lcd.print(Str);

      Unlocked = true;
     }

    else { 

      lcd.clear();
      lcd.print(" Access   Denied.");
      delay(2000);
      lcd.clear();
      lcd.print("Password:");

     }

    while (Unlocked) {
      Unlock();
      if (digitalRead(clearlockbutton)   == LOW) {
        delay(200);
        lcd.clear();
        lcd.print("      Locked");
        delay(2000);
        lcd.clear();
        Unlocked   = false;
        SaveTimer = millis() + 30000;
      }
    }
    
     ClearCode();

    
  }

  else if (clButtonState == LOW) {
     delay(500);

    while (clearlockbutton == LOW);
    if ((millis()   - SaveTimer) > 4500) {
      
    }
    
    ClearCode();
    
   }

  if ( (long)( millis() - DisplayTimer ) >= 0) {
    DisplayTimer   += DisplayDelay;
    lcd.setCursor(9, 0); 
    lcd.print(Str);
    lcd.print("      ");

  }
}

void ClearCode() {
  
  Pos = 0;
  Str[Pos]   = '\\0';
  lcd.setCursor(0, 0);
  lcd.print("Password:");
  lcd.setCursor(0,   1);
  lcd.print("          ");
  
}

void Unlock() {

  myServo.write(150);
   
}

void Lock() {

  myServo.write(50);

}

Code

arduino

1/* 
2Made by Marco Fusco
3May 20, 2016
4Contact me at: marcofusco111@gmail.com
5*/
6   
7
8#include <LiquidCrystal.h>
9#include <EEPROM.h>
10#include <Servo.h>
11
12int  address = 0;
13static unsigned long SaveTimer;
14static unsigned long SaveDelay  = (30 * 1000); 
15
16
17char CODE[10] = "1234E"; 
18char Str[10]; 
19char  CodeLength = 4;
20int Pos = 0;
21bool Unlocked;
22static unsigned long DisplayTimer;  
23static unsigned long DisplayDelay = 200;
24
25LiquidCrystal lcd(12, 11, 9,  8, 7, 6); 
26
27
28int buttonPin1 = 2;   
29int buttonPin2 = 3;
30int buttonPin3  = 4;
31int buttonPin4 = 5;
32
33int enterbutton = 10; 
34int clearlockbutton  = 13;
35
36Servo myServo;
37
38void setup() {
39
40  myServo.attach(A1);
41  
42  int EEPROMCodeOK = true;
43  for (Pos = 0; Pos <= (CodeLength); Pos++)  {
44    Str[Pos] =  EEPROM.read(Pos);
45    if (!(strrchr("1123456789", Str[Pos])))  { 
46      // not a valid code
47      EEPROMCodeOK = false;
48    }
49  }
50  Pos++;
51  Str[Pos] =  EEPROM.read(Pos); 
52  if (Str[CodeLength + 1] != 'E')  EEPROMCodeOK = false; 
53  if (EEPROMCodeOK) {
54    Str[CodeLength + 2] = '\\0';
55    strncpy(CODE, Str, CodeLength + 1);
56  }
57  ClearCode();
58
59  pinMode(buttonPin1,  INPUT_PULLUP);
60  pinMode(buttonPin2, INPUT_PULLUP);
61  pinMode(buttonPin3,  INPUT_PULLUP);
62  pinMode(buttonPin4, INPUT_PULLUP);
63
64  pinMode(enterbutton,  INPUT_PULLUP);
65  pinMode(clearlockbutton, INPUT_PULLUP);
66
67  lcd.begin(16,  2);
68  lcd.setCursor(0, 0);
69  lcd.print("Hello.");
70  delay(2000);
71  lcd.clear();
72  lcd.setCursor(0, 0);
73  lcd.print("Password:");
74
75  DisplayTimer = millis() + 200;
76}
77
78
79void loop() {
80  
81  Lock();
82  
83  Pos = constrain(Pos, 0, CodeLength);
84
85  int buttonState1 = digitalRead(buttonPin1);  
86  int buttonState2 = digitalRead(buttonPin2);
87  int buttonState3 = digitalRead(buttonPin3);
88  int buttonState4 = digitalRead(buttonPin4);
89
90  int clButtonState = digitalRead(clearlockbutton);
91  int enterButtonState = digitalRead(enterbutton);
92
93  lcd.setCursor(9, 0);
94
95  if (buttonState1 == LOW) {
96    Str[Pos] = '1';
97    Pos++;
98    Str[Pos]  = '\\0';
99    delay(250); 
100    while (digitalRead(buttonPin1) == LOW); 
101
102  }
103
104  else if (buttonState2 == LOW) {
105    Str[Pos] = '2';
106    Pos++;
107    Str[Pos] = '\\0';
108    delay(250); 
109    while (digitalRead(buttonPin2)  == LOW);
110
111  }
112
113  else if (buttonState3 == LOW) {
114    Str[Pos] = '3';
115    Pos++;
116    Str[Pos] = '\\0';
117    delay(250); 
118    while (digitalRead(buttonPin3)  == LOW);
119  }
120
121  else if (buttonState4 == LOW) {
122    Str[Pos] = '4';
123    Pos++;
124    Str[Pos] = '\\0';
125    delay(250); 
126    while (digitalRead(buttonPin4)  == LOW); 
127
128  }
129  else if (enterButtonState == LOW) {
130    Str[Pos] =  'E';
131    Pos++;
132    Str[Pos] = '\\0';
133    delay(250);
134    while (digitalRead(buttonPin1)  == LOW); 
135     if (strcmp (Str,CODE) == 0) {
136      Unlocked = true;
137      lcd.setCursor(0,  0);
138      lcd.print(" Access Granted");
139      delay(2000);
140      lcd.clear();
141      lcd.print("    Unlocked");
142    } 
143    else if (SaveTimer > millis()  && (Pos + 1) == CodeLength) { 
144
145      strcpy(CODE, Str);
146      for (Pos  = 0; Pos <= (CodeLength + 1); Pos++) {
147        EEPROM.write(Pos, Str[Pos]);
148      }
149      lcd.setCursor(0, 0);
150      lcd.print("Saving Code:");
151      lcd.setCursor(0, 1);
152      lcd.print(Str);
153
154      Unlocked = true;
155    }
156
157    else { 
158
159      lcd.clear();
160      lcd.print(" Access  Denied.");
161      delay(2000);
162      lcd.clear();
163      lcd.print("Password:");
164
165    }
166
167    while (Unlocked) {
168      Unlock();
169      if (digitalRead(clearlockbutton)  == LOW) {
170        delay(200);
171        lcd.clear();
172        lcd.print("     Locked");
173        delay(2000);
174        lcd.clear();
175        Unlocked  = false;
176        SaveTimer = millis() + 30000;
177      }
178    }
179    
180    ClearCode();
181
182    
183  }
184
185  else if (clButtonState == LOW) {
186    delay(500);
187
188    while (clearlockbutton == LOW);
189    if ((millis()  - SaveTimer) > 4500) {
190      
191    }
192    
193    ClearCode();
194    
195  }
196
197  if ( (long)( millis() - DisplayTimer ) >= 0) {
198    DisplayTimer  += DisplayDelay;
199    lcd.setCursor(9, 0); 
200    lcd.print(Str);
201    lcd.print("     ");
202
203  }
204}
205
206void ClearCode() {
207  
208  Pos = 0;
209  Str[Pos]  = '\\0';
210  lcd.setCursor(0, 0);
211  lcd.print("Password:");
212  lcd.setCursor(0,  1);
213  lcd.print("          ");
214  
215}
216
217void Unlock() {
218
219  myServo.write(150);
220  
221}
222
223void Lock() {
224
225  myServo.write(50);
226
227}
228
229

/* 
Made by Marco Fusco
May 20, 2016
Contact me at: marcofusco111@gmail.com
*/
   

#include <LiquidCrystal.h>
#include <EEPROM.h>
#include <Servo.h>

int  address = 0;
static unsigned long SaveTimer;
static unsigned long SaveDelay  = (30 * 1000); 


char CODE[10] = "1234E"; 
char Str[10]; 
char  CodeLength = 4;
int Pos = 0;
bool Unlocked;
static unsigned long DisplayTimer;  
static unsigned long DisplayDelay = 200;

LiquidCrystal lcd(12, 11, 9,  8, 7, 6); 


int buttonPin1 = 2;   
int buttonPin2 = 3;
int buttonPin3  = 4;
int buttonPin4 = 5;

int enterbutton = 10; 
int clearlockbutton  = 13;

Servo myServo;

void setup() {

  myServo.attach(A1);
  
  int EEPROMCodeOK = true;
  for (Pos = 0; Pos <= (CodeLength); Pos++)  {
    Str[Pos] =  EEPROM.read(Pos);
    if (!(strrchr("1123456789", Str[Pos])))  { 
      // not a valid code
      EEPROMCodeOK = false;
    }
  }
  Pos++;
  Str[Pos] =  EEPROM.read(Pos); 
  if (Str[CodeLength + 1] != 'E')  EEPROMCodeOK = false; 
  if (EEPROMCodeOK) {
    Str[CodeLength + 2] = '\\0';
    strncpy(CODE, Str, CodeLength + 1);
  }
  ClearCode();

  pinMode(buttonPin1,  INPUT_PULLUP);
  pinMode(buttonPin2, INPUT_PULLUP);
  pinMode(buttonPin3,  INPUT_PULLUP);
  pinMode(buttonPin4, INPUT_PULLUP);

  pinMode(enterbutton,  INPUT_PULLUP);
  pinMode(clearlockbutton, INPUT_PULLUP);

  lcd.begin(16,  2);
  lcd.setCursor(0, 0);
  lcd.print("Hello.");
  delay(2000);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Password:");

  DisplayTimer = millis() + 200;
}


void loop() {
  
  Lock();
  
  Pos = constrain(Pos, 0, CodeLength);

  int buttonState1 = digitalRead(buttonPin1);  
  int buttonState2 = digitalRead(buttonPin2);
  int buttonState3 = digitalRead(buttonPin3);
  int buttonState4 = digitalRead(buttonPin4);

  int clButtonState = digitalRead(clearlockbutton);
  int enterButtonState = digitalRead(enterbutton);

  lcd.setCursor(9, 0);

  if (buttonState1 == LOW) {
    Str[Pos] = '1';
    Pos++;
    Str[Pos]  = '\\0';
    delay(250); 
    while (digitalRead(buttonPin1) == LOW); 

  }

  else if (buttonState2 == LOW) {
    Str[Pos] = '2';
    Pos++;
    Str[Pos] = '\\0';
    delay(250); 
    while (digitalRead(buttonPin2)  == LOW);

  }

  else if (buttonState3 == LOW) {
    Str[Pos] = '3';
    Pos++;
    Str[Pos] = '\\0';
    delay(250); 
    while (digitalRead(buttonPin3)  == LOW);
  }

  else if (buttonState4 == LOW) {
    Str[Pos] = '4';
    Pos++;
    Str[Pos] = '\\0';
    delay(250); 
    while (digitalRead(buttonPin4)  == LOW); 

  }
  else if (enterButtonState == LOW) {
    Str[Pos] =  'E';
    Pos++;
    Str[Pos] = '\\0';
    delay(250);
    while (digitalRead(buttonPin1)  == LOW); 
     if (strcmp (Str,CODE) == 0) {
      Unlocked = true;
      lcd.setCursor(0,  0);
      lcd.print(" Access Granted");
      delay(2000);
      lcd.clear();
      lcd.print("    Unlocked");
    } 
    else if (SaveTimer > millis()  && (Pos + 1) == CodeLength) { 

      strcpy(CODE, Str);
      for (Pos  = 0; Pos <= (CodeLength + 1); Pos++) {
        EEPROM.write(Pos, Str[Pos]);
      }
      lcd.setCursor(0, 0);
      lcd.print("Saving Code:");
      lcd.setCursor(0, 1);
      lcd.print(Str);

      Unlocked = true;
    }

    else { 

      lcd.clear();
      lcd.print(" Access  Denied.");
      delay(2000);
      lcd.clear();
      lcd.print("Password:");

    }

    while (Unlocked) {
      Unlock();
      if (digitalRead(clearlockbutton)  == LOW) {
        delay(200);
        lcd.clear();
        lcd.print("     Locked");
        delay(2000);
        lcd.clear();
        Unlocked  = false;
        SaveTimer = millis() + 30000;
      }
    }
    
    ClearCode();

    
  }

  else if (clButtonState == LOW) {
    delay(500);

    while (clearlockbutton == LOW);
    if ((millis()  - SaveTimer) > 4500) {
      
    }
    
    ClearCode();
    
  }

  if ( (long)( millis() - DisplayTimer ) >= 0) {
    DisplayTimer  += DisplayDelay;
    lcd.setCursor(9, 0); 
    lcd.print(Str);
    lcd.print("     ");

  }
}

void ClearCode() {
  
  Pos = 0;
  Str[Pos]  = '\\0';
  lcd.setCursor(0, 0);
  lcd.print("Password:");
  lcd.setCursor(0,  1);
  lcd.print("          ");
  
}

void Unlock() {

  myServo.write(150);
  
}

void Lock() {

  myServo.write(50);

}

Downloadable files

Diagram

Comments

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Anonymous user

2 years ago

Great work bro. I am working on similar project at this time and I am always read blogs of your and some others who are inspiring me to for that. https://techatronic.com/ldr-sensor-with-arduino-tutorial/ That is the one of my favorite project and I was completed it by the help of this blog you can get idea from that blog also for writing. Keep posting!

rogby

2 years ago

My 1602 LCD is not turning on and when the code is uploaded the Servo just goes back and forth by 45 degrees.

Anonymous user

2 years ago

do you need the capacitor

Anonymous user

2 years ago

Nice job, simple and demonstrate so much more...

chummer1010

2 years ago

Thanks! As silly as using a shoebox is, it worked out great to demo this project.

Anonymous user

2 years ago

Hey :D I have a question, is it possible to make your own password? xD also, is it possible to change your password at any time?

Anonymous user

2 years ago

Thanks for the project. It was easy to create. That is what I was needing for being a complete beginner. Good Job!

Anonymous user

2 years ago

Great project! Just what I'm looking for. This will be my first project, and I have one question. Is there any way to make the lock 'relock' itself automatically once closed and untouched for, say, ten seconds? Thanks for any insight you can provide.

Anonymous user

2 years ago

For some reason the original combination of 123142 never worked but 123423 and several others did Still have not figured out how to reset combination

Anonymous user

2 years ago

can this project be done using qapass 1602a lc 16x2. if yes pls share the schematic on siddhantgmohite10@gmail.com

Anonymous user

2 years ago

Thank you for inspiring me to make a similar project! Here's a solution to the EEPROM problem: void EEPROMkode() { int EEPROMkodeOK = true; int addresse = 10; for (Pos = 0; Pos <= (kodeLengde - 1); Pos++) { Str[Pos] = EEPROM.read(Pos); if (!(strrchr("11234567890", Str[Pos]))) { EEPROMkodeOK = false; } } Str[kodeLengde] = EEPROM.read(kodeLengde); if (Str[kodeLengde] != '#') EEPROMkodeOK = false; if (EEPROMkodeOK) { Str[kodeLengde + 1] = '\\0'; strncpy(kode, Str, kodeLengde + 1); } }

Anonymous user

2 years ago

Nevermind the int addresse = 10;

Anonymous user

2 years ago

Thank you for inspiring me to make a similar project! A solution to the EEPROM problem: void EEPROMkode() { int EEPROMkodeOK = true; for (Pos = 0; Pos <= (kodeLengde - 1); Pos++) { Str[Pos] = EEPROM.read(Pos); if (!(strrchr("11234567890", Str[Pos]))) { EEPROMkodeOK = false; } } Str[kodeLengde] = EEPROM.read(kodeLengde); if (Str[kodeLengde] != '#') EEPROMkodeOK = false; if (EEPROMkodeOK) { Str[kodeLengde + 1] = '\\0'; strncpy(kode, Str, kodeLengde + 1); } }

Anonymous user

2 years ago

I am having a problem while recreating your project. The problem is that numbers that are entered for the passcode are not being stored. Whenever a button is pressed for more than 2 seconds and let go, the number appears on the display and then quickly disappears. Here is a link to what is happening: https://www.youtube.com/watch?v=Ux3bb2e28ds I used both iterations of code (Password 1234E and 123142E) and the same problem persists. With the 123142E code, the screen keeps refreshing. I have recreated this in 123D Circuits and I am having the same problems in the simulation. Have you ran into any similar problems like this and know of any potential solutions?

Anonymous user

2 years ago

Thank you so much you have no idea how much that will help!

chummer1010

2 years ago

That's strange... Check the connections in your buttons, perhaps. Are those normal push buttons? Also, do you have the EEPROM library installed in your IDE? What version are you running? Thanks for asking, this actually feels pretty cool that somebody built this!

chummer1010

2 years ago

I will do the best I can to find a solution. I'm going to take a look at this code tonight/tomorrow and see what is wrong. For all I know I published an older version of the final code by mistake. I'll see what I can do and I'll get back to you as soon as possible.

chummer1010

2 years ago

This is odd... Try something for me. Copy and paste the code into a new sketch and see what happens when you delete ClearCode(); from every line it appears in, and then delete everything in void ClearCode() at the very end.

chummer1010

2 years ago

I noticed in your video and photos you emailed me that your Uno board looks different than mine. What exact model is it? and it is a real Arduino or a clone?

Anonymous user

2 years ago

When i delete every ClearCode(); and delete everything inside ClearCode(), none of the buttons work. I have copied and pasted your code into a simulation with my breadboard layout. If you could check over my simulation and maybe help me find the problem that would be great! https://123d.circuits.io/circuits/2341563-arduino-safe

Anonymous user

2 years ago

It is a real Arduino Uno. Im not so sure on how old they are but I can tell you for certain that they are not clone models. The issue has been recreated in the simulation so i'm sure that it might be a code problem instead of a hardware one. The code should be viewable on the simulation website next to the run simulation button. If you could take a look at it and maybe check if there are any errors of to why its happening then it would be greatly appreciated! :)

Anonymous user

2 years ago

I have checked my buttons and have a version of the code where only pressing enter unlocks the safe then locks it again immediately. I have added a 20 second timer to help with this. I imported in the EEPROM library with "#include <EEPROM.h>" and am running IDE version 1.6.9 and am running version 2.0 of EEPROM.

Anonymous user

2 years ago

Great Job! I just finished the project and it works well but my LCD display is very low on brightness. Any ideas to make it brighter?

chummer1010

2 years ago

I'm working on finding a solution to why this isn't working.. .Have you ever used EEPROM with that particular board before?

chummer1010

2 years ago

Please be patient, I have a lot of other things to do on my hands. Why don't you study the code a little? If this worked 100% you would just be blindly copying and pasting the code and probably never even looked at it.

chummer1010

2 years ago

Glad you got things to work! Could you email me the code so I can post it here? That would be much appreciated. Thanks, Marco

chummer1010

2 years ago

That's great to hear! As for the display, make sure your wiring matches the diagram. Also, what are you using for a power source?

Anonymous user

2 years ago

jeg_er_hvalross, if you still didn't find a solution to your display issue, check if the resistor going into the LED (back-light input) of the LCD is more than 0.1 ohms. ;)

Anonymous user

2 years ago

Hey, I actually have the same problem you had with the numbers disappearing after a second. do you maybe remember after 6 years how you solved this problem? xD Thanks allot :)

Anonymous user

2 years ago

I finally got it to work and have even made it more secure where other people cannot see the password that you are typing in. Thank you for your help.

Anonymous user

2 years ago

Yes I have, Before this project i've done others like temperature sensors with almost the same hardware but a temperature sensor instead of a servo. The thing that bothers me the most is not being able to get it working in a simulation. The exact same problem I am having on the board is the same one as the simulation. On the simulation, I've used the same code as the one on the instructables site and in this case the screen keeps refreshing :( https://123d.circuits.io/circuits/2341563-arduino-safe I have even removed every ClearCode(); command in the simulation code but the problem still persists. Is it possible for you to send the iteration of code you used to get the project working yourself?

Anonymous user

2 years ago

Quick Question, have you made any changes to code for the project to work or have you used the code provided on this page? Im having trouble with getting this project to work correctly and it would really help if I knew if I have to make changes to code. Thanks :)

Anonymous user

2 years ago

Hi Chummer Can you please tell what is the role of the following variables: SaveTimer, SaveDelay, DisplayTimer & DisplayDelay?

chummer1010

2 years ago

Hey, These are all parts of the code for saving a new password, but I never got around to completing that part. I'm working on debugging and cleaning this code up as much as I can. Marco

Anonymous user

2 years ago

Works Great, But when I put in the RIGHT pass code, the servo motor wont turn at all.

Anonymous user

2 years ago

Hi is it possible to change the LCD to I2C lcd? If yes what is the code

cochrane

4 years ago

Thanks for the project. It was easy to create. That is what I was needing for being a complete beginner. Good Job!

Anonymous user

4 years ago

can this project be done using qapass 1602a lc 16x2. if yes pls share the schematic on siddhantgmohite10@gmail.com

Anonymous user

4 years ago

Anonymous user

4 years ago

Anonymous user

5 years ago

Works Great, But when I put in the RIGHT pass code, the servo motor wont turn at all.

Anonymous user

6 years ago

do you need the capacitor

stevepcbman

6 years ago

For some reason the original combination of 123142 never worked but 123423 and several others did Still have not figured out how to reset combination

rogby

7 years ago

My 1602 LCD is not turning on and when the code is uploaded the Servo just goes back and forth by 45 degrees.

Anonymous user

7 years ago

Hey :D I have a question, is it possible to make your own password? xD also, is it possible to change your password at any time?

Anonymous user

8 years ago

Hi is there a way to add more buttons and numbers?

Silverhand

8 years ago

Silverhand

2 years ago

Nevermind the int addresse = 10;

Silverhand

8 years ago

subhroneel93

9 years ago

Hi Chummer Can you please tell what is the role of the following variables: SaveTimer, SaveDelay, DisplayTimer & DisplayDelay?

chummer1010

2 years ago

Hey, These are all parts of the code for saving a new password, but I never got around to completing that part. I'm working on debugging and cleaning this code up as much as I can. Marco

xtremegamr99

9 years ago

xtremegamr99

2 years ago

xtremegamr99

2 years ago

Thank you so much you have no idea how much that will help!

xtremegamr99

2 years ago

xtremegamr99

2 years ago

chummer1010

2 years ago

chummer1010

2 years ago

I noticed in your video and photos you emailed me that your Uno board looks different than mine. What exact model is it? and it is a real Arduino or a clone?

chummer1010

2 years ago

chummer1010

2 years ago

jeg_er_hvalross

9 years ago

Great Job! I just finished the project and it works well but my LCD display is very low on brightness. Any ideas to make it brighter?

Anonymous user

2 years ago

Hey, I actually have the same problem you had with the numbers disappearing after a second. do you maybe remember after 6 years how you solved this problem? xD Thanks allot :)

raymondogunjimi

2 years ago

jeg_er_hvalross, if you still didn't find a solution to your display issue, check if the resistor going into the LED (back-light input) of the LCD is more than 0.1 ohms. ;)

xtremegamr99

2 years ago

I finally got it to work and have even made it more secure where other people cannot see the password that you are typing in. Thank you for your help.

xtremegamr99

2 years ago

xtremegamr99

2 years ago

chummer1010

2 years ago

I'm working on finding a solution to why this isn't working.. .Have you ever used EEPROM with that particular board before?

chummer1010

2 years ago

chummer1010

2 years ago

Glad you got things to work! Could you email me the code so I can post it here? That would be much appreciated. Thanks, Marco

chummer1010

2 years ago

That's great to hear! As for the display, make sure your wiring matches the diagram. Also, what are you using for a power source?

Anonymous user

9 years ago

Nice job, simple and demonstrate so much more...

chummer1010

2 years ago

Thanks! As silly as using a shoebox is, it worked out great to demo this project.

chummer1010

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