How to make password Door lock Keypad 4x3 using Arduino Uno 

Okay thank you sir for your support to me

If you want to change the password, follow my video

This is the code: drive.google.com/file/d/1XzOrQlcDAsehIP7eGtkASoLLlzDz_ab-/view

Yes, this code has its drawbacks, as long as we change the new password we off-on again enter new password not must enter old password

Can you help in this types of problem, bcoz i'm also finding solution which is mentioned by you. If your answer is yes then please reply me

@@dishantparigoswami3970 Yes. I have found the solution. The password is retained even after an on-off-on. Follow this--- We have used inbuilt arduino’s EEPROM to save password, so when we run this circuit first time program read a garbage data from inbuilt arduino’s EEPROM and compare it with input password and give a message on LCD that is Access Denied because password does not match. For solving this problem we need to set a default password for the first time by using programming given below: for(int j=0;j

There is a way to fix it in the code

Change the password in the code

this is code; #include #include #include #include LiquidCrystal_I2C lcd(0x27, 16, 2); char password[5]; char initial_password[4],new_password[4]; int vcc=11; int i=0; int relay_pin = 5; char key_pressed=0; const byte rows = 4; const byte columns = 3; char hexaKeys[rows][columns] = { {'1', '2', '3'}, {'4', '5', '6'}, {'7', '8', '9'}, {'*', '0', '#'} }; byte row_pins[rows]={10,11,12,13}; byte column_pins[columns]={7,8,9}; Keypad keypad_key=Keypad( makeKeymap(hexaKeys),row_pins,column_pins,rows,columns); void setup(){ lcd.backlight(); lcd.init(); pinMode(relay_pin, OUTPUT); pinMode(vcc, OUTPUT); lcd.clear(); lcd.setCursor(0,0); lcd.print(" The door has a "); lcd.setCursor(4,1); lcd.print("Password "); delay(5000); lcd.clear(); lcd.print("Enter Password"); lcd.setCursor(0,1); initialpassword(); } void loop(){ digitalWrite(relay_pin,HIGH); key_pressed = keypad_key.getKey(); if(key_pressed=='#') change(); if (key_pressed) { password[i++]=key_pressed; lcd.print(key_pressed); } if(i==4) { delay(200); for(int j=0;j

@@EsakkiRaja-q9r drive.google.com/file/d/1XzOrQlcDAsehIP7eGtkASoLLlzDz_ab-/view

Yes

Answer me please!!!😥

Yes You must connect laptop

What if I don't connect to laptop?

@@Mradi471 Use mobile phone download app play.google.com/store/apps/details?id=name.antonsmirnov.android.arduinodroid2&pcampaignid=web_share

Use Switch

@@technologi-electronic where is the swith

@@nurdaniahumaira4595 this is the clip I still install the switch

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-CAMi5jHWURA.html

Yes I will share the code to you

Yes I will share the code to you

#include char* password = "1234"; // change the password here, just pick any 4 numbers int position = 0; const byte ROWS = 4; const byte COLS = 4; char keys[ROWS][COLS] = { {'1','2','3','A'}, {'4','5','6','B'}, {'7','8','9','C'}, {'*','0','#','D'} }; byte rowPins[ROWS] = { 9, 8, 7, 6 }; byte colPins[COLS] = { 5, 4, 3, 2 }; Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS ); int Lock = 13; void setup() { pinMode(Lock, OUTPUT); LockedPosition(true); } void loop() { char key = keypad.getKey(); if (key == '*' || key == '#') { position = 0; LockedPosition(true); } if (key == password[position]) { position ++; } if (position == 3) { LockedPosition(false); } delay(100); } void LockedPosition(int locked) { if (locked) { digitalWrite(Lock, LOW); } else { digitalWrite(Lock, HIGH); } }

@@technologi-electronic why it's shorter than what you have showed in the vid?

drive.google.com/file/d/1XzOrQlcDAsehIP7eGtkASoLLlzDz_ab-/view

This is the code: drive.google.com/file/d/199YH07l7tvs7dmJV-eitkI7bJ2A17WIa/view

@@technologi-electronic in this code, we can not initialize the password, the pw are always wrong :(

@@dqlamm Check the connection between the Keypad and the Arduino correctly. Many people connect the Keypad incorrectly, which makes us enter the code incorrectly.

Yes I will upload Video use RFID RC522 and code

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-CAMi5jHWURA.html

Im tryna find it to

Please reply

Yes I will share the code to you

Thank bro

@@mohammedfaduruden302 This is code: #include #include #include #include LiquidCrystal_I2C lcd(0x27, 16, 2); char password[5]; char initial_password[4],new_password[4]; int vcc=11; int i=0; int relay_pin = 5; char key_pressed=0; const byte rows = 4; const byte columns = 3; char hexaKeys[rows][columns] = { {'1', '2', '3'}, {'4', '5', '6'}, {'7', '8', '9'}, {'*', '0', '#'} }; byte row_pins[rows]={10,11,12,13}; byte column_pins[columns]={7,8,9}; Keypad keypad_key=Keypad( makeKeymap(hexaKeys),row_pins,column_pins,rows,columns); void setup(){ lcd.backlight(); lcd.init(); pinMode(relay_pin, OUTPUT); pinMode(vcc, OUTPUT); lcd.clear(); lcd.setCursor(0,0); lcd.print(" The door has a "); lcd.setCursor(4,1); lcd.print("Password "); delay(5000); lcd.clear(); lcd.print("Enter Password"); lcd.setCursor(0,1); initialpassword(); } void loop(){ digitalWrite(relay_pin,HIGH); key_pressed = keypad_key.getKey(); if(key_pressed=='#') change(); if (key_pressed) { password[i++]=key_pressed; lcd.print(key_pressed); } if(i==4) { delay(200); for(int j=0;j

@UNKNOWN ROBO GAMING Are you have Computer Copy in Computer

@UNKNOWN ROBO GAMING Enter your gmail I will share the code to you

i using password 1234 but not working

Wrong password

You connected the keypad to the Arduino incorrectly

@@technologi-electronic i using esp32,can this code working for esp32??

@@muhammadrifaie296 not work

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Ok conect my Gmail : maikhamxiong1234@gmail.com

Please send

Hello please send me the circuit diagram for this project

@@chithraisakiraja5696 please inter your Gmail here I will send to you

Can u send the circuit diagram?