Introduction
In This Tutorial, we will show the keypad-based security system. this system is required for our home or office so that no one can access the room without our permission and ensure protection against theft or loss of our important accessories and assets.
so let’s do the project, Arduino keypad-based door look which can be mounted to any of your existing doors to secure them with a digital password.
if you interested in more Arduino Tutorial
Bill of Materials
These all are components needed to make the Project
S.N | Component | Quantity | Link To Buy |
1 | Arduino nano | 1 | |
2 | 16x2 LCD Display | 1 | |
3 | 10k Pot | 1 | |
4 | SG-90 Servo motor | 1 | |
5 | 4x4 Keypad | 1 | |
6 | Buzzer | 1 | |
7 | Zero PCB | 1 | |
8 | 12v Power Supply | 1 |
Circuit diagram
Now we connected all the Components. the Arduino board is the brain of our project hey controls all things.16×2 LCD Display will be connected to the Arduino when turning on the system first welcome message will display on the LCD.
In this project, we used the 4×4 matrix Keypad we need to password input manually to unlock our customized door locker.
Source CodeĀ
Now we upload the code but wait, first, you add the few libraries first then you upload the code.
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#include <Keypad.h> #include <LiquidCrystal.h> #include <Servo.h> Servo myservo; int pos = 0; LiquidCrystal lcd(12, 11, 10, 9, 8, 7); const byte rows = 4; const byte cols = 4; char key[rows][cols] = { { '1', '2', '3' }, { '4', '5', '6' }, { '7', '8', '9' }, { '*', '0', '#' } }; byte rowPins[rows] = { A0, A1, A2, A3 }; byte colPins[cols] = { A4, A5, A6, A7 }; Keypad keypad = Keypad(makeKeymap(key), rowPins, colPins, rows, cols); char* password = "4567"; int currentposition = 0; int redled = 6; int greenled = 5; int buzz = 4; int invalidcount = 12; void setup() { displayscreen(); Serial.begin(9600); pinMode(redled, OUTPUT); pinMode(greenled, OUTPUT); pinMode(buzz, OUTPUT); myservo.attach(4); lcd.begin(16, 2); } void loop() { if (currentposition == 0) { displayscreen(); } int l; char code = keypad.getKey(); if (code != NO_KEY) { lcd.clear(); lcd.setCursor(0, 0); lcd.print("PASSWORD:"); lcd.setCursor(7, 1); lcd.print(" "); lcd.setCursor(7, 1); for (l = 0; l <= currentposition; ++l) { lcd.print("*"); keypress(); } if (code == password[currentposition]) { ++currentposition; if (currentposition == 4) { unlockdoor(); currentposition = 0; } } else { ++invalidcount; incorrect(); currentposition = 0; } if (invalidcount == 5) { ++invalidcount; torture1(); } if (invalidcount == 8) { torture2(); } } } void unlockdoor() { delay(900); lcd.setCursor(0, 0); lcd.println(" "); lcd.setCursor(1, 0); lcd.print("Access Granted"); lcd.setCursor(4, 1); lcd.println("WELCOME!!"); lcd.setCursor(15, 1); lcd.println(" "); lcd.setCursor(16, 1); lcd.println(" "); lcd.setCursor(14, 1); lcd.println(" "); lcd.setCursor(13, 1); lcd.println(" "); unlockbuzz(); for (pos = 180; pos >= 0; pos -= 5) { myservo.write(pos); delay(5); } delay(2000); counterbeep(); delay(1000); for (pos = 0; pos <= 180; pos += 5) { myservo.write(pos); delay(15); currentposition = 0; lcd.clear(); displayscreen(); } } void incorrect() { delay(500); lcd.clear(); lcd.setCursor(1, 0); lcd.print("CODE"); lcd.setCursor(6, 0); lcd.print("INCORRECT"); lcd.setCursor(15, 1); lcd.println(" "); lcd.setCursor(4, 1); lcd.println("GET AWAY!!!"); lcd.setCursor(13, 1); lcd.println(" "); Serial.println("CODE INCORRECT YOU ARE UNAUTHORIZED"); digitalWrite(redled, HIGH); digitalWrite(buzz, HIGH); delay(3000); lcd.clear(); digitalWrite(redled, LOW); digitalWrite(buzz, LOW); displayscreen(); } void clearscreen() { lcd.setCursor(0, 0); lcd.println(" "); lcd.setCursor(0, 1); lcd.println(" "); lcd.setCursor(0, 2); lcd.println(" "); lcd.setCursor(0, 3); lcd.println(" "); } void keypress() { digitalWrite(buzz, HIGH); delay(50); digitalWrite(buzz, LOW); } void displayscreen() { lcd.setCursor(0, 0); lcd.println("*ENTER THE CODE*"); lcd.setCursor(1, 1); lcd.println("TO _/_ (OPEN)!!"); } void armservo() { for (pos = 180; pos <= 180; pos += 50) { myservo.write(pos); delay(5); } delay(5000); for (pos = 180; pos >= 0; pos -= 50) { myservo.write(pos); } } void unlockbuzz() { digitalWrite(buzz, HIGH); delay(80); digitalWrite(buzz, LOW); delay(80); digitalWrite(buzz, HIGH); delay(80); digitalWrite(buzz, LOW); delay(200); digitalWrite(buzz, HIGH); delay(80); digitalWrite(buzz, LOW); delay(80); digitalWrite(buzz, HIGH); delay(80); digitalWrite(buzz, LOW); delay(80); } void counterbeep() { delay(1200); lcd.clear(); digitalWrite(buzz, HIGH); lcd.setCursor(2, 15); lcd.println(" "); lcd.setCursor(2, 14); lcd.println(" "); lcd.setCursor(2, 0); delay(200); lcd.println("GET IN WITHIN:::"); lcd.setCursor(4, 1); lcd.print("5"); delay(200); lcd.clear(); lcd.setCursor(2, 0); lcd.println("GET IN WITHIN:"); digitalWrite(buzz, LOW); delay(1000); digitalWrite(buzz, HIGH); lcd.setCursor(2, 0); lcd.println("GET IN WITHIN:"); lcd.setCursor(4, 1); lcd.print("4"); delay(100); lcd.clear(); lcd.setCursor(2, 0); lcd.println("GET IN WITHIN:"); digitalWrite(buzz, LOW); delay(1000); digitalWrite(buzz, HIGH); lcd.setCursor(2, 0); lcd.println("GET IN WITHIN:"); lcd.setCursor(4, 1); //3 lcd.print("3"); delay(100); lcd.clear(); lcd.setCursor(2, 0); lcd.println("GET IN WITHIN:"); digitalWrite(buzz, LOW); delay(1000); digitalWrite(buzz, HIGH); lcd.setCursor(2, 0); lcd.println("GET IN WITHIN:"); lcd.setCursor(4, 1); //4 lcd.print("2"); delay(100); lcd.clear(); lcd.setCursor(2, 0); lcd.println("GET IN WITHIN:"); digitalWrite(buzz, LOW); delay(1000); digitalWrite(buzz, HIGH); lcd.setCursor(4, 1); lcd.print("1"); delay(100); lcd.clear(); lcd.setCursor(2, 0); lcd.println("GET IN WITHIN::"); digitalWrite(buzz, LOW); delay(1000); //5 digitalWrite(buzz, HIGH); delay(40); digitalWrite(buzz, LOW); delay(40); digitalWrite(buzz, HIGH); delay(40); digitalWrite(buzz, LOW); delay(40); digitalWrite(buzz, HIGH); delay(40); digitalWrite(buzz, LOW); delay(40); digitalWrite(buzz, HIGH); delay(40); digitalWrite(buzz, LOW); lcd.clear(); lcd.setCursor(2, 0); lcd.print("RE-LOCKING"); delay(500); lcd.setCursor(12, 0); lcd.print("."); delay(500); lcd.setCursor(13, 0); lcd.print("."); delay(500); lcd.setCursor(14, 0); lcd.print("."); delay(400); lcd.clear(); lcd.setCursor(4, 0); lcd.print("LOCKED!"); delay(440); } void torture1() { delay(1000); lcd.clear(); lcd.setCursor(2, 0); lcd.print("WAIT FOR "); lcd.setCursor(5, 1); lcd.print("15 SECONDS"); digitalWrite(buzz, HIGH); delay(15000); digitalWrite(buzz, LOW); lcd.clear(); lcd.setCursor(2, 0); lcd.print("LOL.."); lcd.setCursor(1, 1); lcd.print(" HOW WAS THAT??"); delay(3500); lcd.clear(); } void torture2() { delay(1000); lcd.setCursor(1, 0); lcd.print(" "); lcd.setCursor(2, 0); lcd.print("EAR DRUMS ARE"); lcd.setCursor(0, 1); lcd.print(" PRECIOUS!! "); delay(1500); lcd.clear(); lcd.setCursor(1, 0); lcd.print(" WAIT FOR"); lcd.setCursor(4, 1); lcd.print(" 1 MINUTE"); digitalWrite(buzz, HIGH); delay(55000); counterbeep(); lcd.clear(); digitalWrite(buzz, LOW); lcd.setCursor(2, 0); lcd.print("WANT ME TO"); lcd.setCursor(1, 1); lcd.print("REDICULE MORE??"); delay(2500); lcd.clear(); lcd.setCursor(2, 0); lcd.print("Ha Ha Ha Ha"); delay(1700); lcd.clear(); } |
Demo Of Projects
Ok, we just type the Password with the help of the 4×4 matrix keypad “4567” then the LCD Will Display The * sign if you want to change the passcode then you change in a code.
If the passcode is correct then LCD Display the Access Granted Message will Display and if the passcode in not correct then LCD Display the Passcode No Match Plz Try Again.
