Keypad Based Door Locking Project

Keypad Based Door Locking Project

Circuit Diagram :-

Code :-

//Prteek //www.prateeks.in #include <Keypad.h> const byte ROWS = 4; const byte COLS = 3; char keys[ROWS][COLS] = { {'1','2','3'}, {'4','5','6'}, {'7','8','9'}, {'*','0','#'} }; byte rowPins[ROWS] = {12, 11, 10, 9}; byte colPins[COLS] = {8, 7, 6}; Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS ); String password = "1234"; String mypassword; int redled = 13; int lock = 2; int counter = 0; int attempts = 0; int max_attempts = 3; void setup(){ Serial.begin(9600); pinMode(redled, OUTPUT); pinMode(lock, OUTPUT); digitalWrite(redled, LOW); digitalWrite(lock, LOW); Serial.println("enter password"); } void loop() { keypadfunction(); } void keypadfunction() { char key = keypad.getKey(); if (key){ Serial.println(key); counter = counter + 1; } if (key == '1') { mypassword = mypassword + 1; } if (key == '2') { mypassword = mypassword + 2; } if (key == '3') { mypassword = mypassword + 3; } if (key == '4') { mypassword = mypassword + 4; } if (key == '5') { mypassword = mypassword + 5; } if (key == '6') { mypassword = mypassword + 6; } if (key == '7') { mypassword = mypassword + 7; } if (key == '8') { mypassword = mypassword + 8; } if (key == '9') { mypassword = mypassword + 9; } if (key == '0') { mypassword = mypassword + 0; } if (key == '*') { Serial.println(mypassword); if ( password == mypassword ) { digitalWrite(lock, HIGH); delay(5000); digitalWrite(lock,LOW); mypassword = ""; counter = 0; } else { Serial.println("wrong"); digitalWrite(lock, LOW); attempts = attempts + 1; if (attempts >= max_attempts ) { digitalWrite(redled, HIGH); delay(5000); digitalWrite(redled, LOW); attempts = 0; } mypassword = ""; counter = 0; } } }


Photo :-