Project V - 1. Electric Key with Password using Keypad Module (Arduino Based)

Electric Key with Password using Keypad Module

This tool consists of Arduino UNO as the main system & controller of the system. The keypad is used to input the password code data to determine whether the password is correct so that the lock is open or the password is incorrect so that the key is closed. In other that, it also used to change old password with new password. LCD is used to display password entry or password change menu. Relays as actuators that will directly control the solenoid. Solenoid is used to open or close the key.

Hardware Requirement

Relay Module 5V with Single Channel
Arduino UNO
Solenoid Lock Door Module
4x4 Keypad Module
16 x 2 LCD Module
A Buzzer
Power supply +5 Volt
Jumper

Solenoid Lock Door | Source Keypad 4x4 Module | Source

Relay Module with 1 Channel | Source Buzzer | Source

Block Diagram

Schematic

Arduino - LCD Wiring

Arduino - 4 x 4 Keypad Module Wiring

Arduino - Relay - Buzzer Wiring

Source Code/Sketch

#include <Keypad.h>
#include <LiquidCrystal.h>
#include <EEPROM.h>
unsigned char key,menu,urut;
unsigned char pw1,pw2,pw3,pw4,pw5,pw6,i;
unsigned char pw_kpd1,pw_kpd2,pw_kpd3,pw_kpd4,pw_kpd5,pw_kpd6;
unsigned char cek,cnt;
unsigned char fkpd;
char pw[7],pw_kpd[7];
char s,t;
//----------------------------INISIALISASI KONEKSI LCD 2X16
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);
//----------------------------INISIALISASI KONEKSI KEYPAD 4X4
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]={A0,A1,A2,A3};
byte colPins[COLS]={10,11,12,13};
Keypad keypad = Keypad(makeKeymap(keys),rowPins, colPins, ROWS, COLS);
void setup()
{
pinMode(8,OUTPUT);
pinMode(9,OUTPUT);
digitalWrite(8,0);
digitalWrite(9,0);
lcd.begin(16, 2);
lcd.print(" Kunci Elektrik");
lcd.setCursor(0,1);
lcd.print("Dengan Password");
delay(2000);
//---------------------cek alamat 0
cek=EEPROM.read(0);
if(cek==0xFF){
cek=1;
EEPROM.write(0,'1');
pw1='1'; EEPROM.write(1,'1');
pw2='1'; EEPROM.write(2,'1');
pw3='1'; EEPROM.write(3,'1');
pw4='1'; EEPROM.write(4,'1');
pw5='1'; EEPROM.write(5,'1');
pw6='1'; EEPROM.write(6,'1');
}
else{
pw1=EEPROM.read(1);
pw2=EEPROM.read(2);
pw3=EEPROM.read(3);
pw4=EEPROM.read(4);
pw5=EEPROM.read(5);
pw6=EEPROM.read(6);
}
fkpd=0;
delay(200);
}
void loop()
{
//----------------------------- display time
digitalWrite(8,1);
lcd.clear();
lcd.print("Silakan kunci...");
lcd.setCursor(0,1);
lcd.print("Tekan #");
fkpd=2;
goKeypad();
lcd.clear();
lcd.print("Pintu Terkunci");
delay(3000);
pass:
lcd.clear();
lcd.print("Masukan Password");
lcd.setCursor(0,1);
fkpd=1;
menu=0;
goKeypad();
if(menu==4) goto pass;
}
//---------------------------- keypad
void goKeypad(){
do{
key=keypad.getKey();
if(key != NO_KEY){
if(key=='*' && fkpd==1){
lcd.clear();
lcd.print("Ganti Password");
lcd.setCursor(0,1);
lcd.print("PW lama=");
menu=1;
delay(300);
}
else if(key=='#' && fkpd==2){
fkpd=0;
digitalWrite(8,0);
delay(250);
}
else if ((key=='C')&&(fkpd == 1)){ //C
if(menu==3){
lcd.clear();
lcd.print("PW baru:");
menu=2;
for(t=0;t<6;t++)pw_kpd[t]=' ';
cnt=0;
}
else if(menu==2){
menu=4;
fkpd=0;
for(t=0;t<6;t++)pw_kpd[t]=' ';
cnt=0;
}
else if((menu==1)||(menu==0)){
menu=4;
fkpd=0;
for(t=0;t<6;t++)pw_kpd[t]=' ';
cnt=0;
}
delay(250);
}
else if (key=='D'&& menu==3){
lcd.clear();
lcd.print("Simpan PW Baru..");
EEPROM.write(1,pw_kpd[0]);
EEPROM.write(2,pw_kpd[1]);
EEPROM.write(3,pw_kpd[2]);
EEPROM.write(4,pw_kpd[3]);
EEPROM.write(5,pw_kpd[4]);
EEPROM.write(6,pw_kpd[5]);
EEPROM.write(0,1);
pw1 = pw_kpd[0];
pw2 = pw_kpd[1];
pw3 = pw_kpd[2];
pw4 = pw_kpd[3];
pw5 = pw_kpd[4];
pw6 = pw_kpd[5];
fkpd = 0;
for(t=0;t<6;t++)pw_kpd[t]=' ';
delay(3000);
menu = 4;
}
else if(menu<2 && fkpd==1 && key!='A' && key!='B'
&& key!='C' && key!='D' && key!='*' && key!='#'){
cek_password();
}
else if(menu==2 && fkpd==1&& key!='A' && key!='B'
&& key!='C' && key!='D' && key!='*' && key!='#'){
entri_password();
}
}
}
while(fkpd);
}
void cek_password(){
pw_kpd[cnt]=key;
cnt++;
lcd.print('*');
// lcd.print(char(key));
if((cnt==6)&&(menu==0)){
delay(500);
if((pw1==pw_kpd[0])&&(pw2==pw_kpd[1])&&(pw3==pw_kpd[2])&&(pw4==pw_kpd[3])&&(pw5==pw_kpd[4])&&(pw6==pw_kpd[5])){
lcd.clear();
lcd.print("Password Benar");
lcd.setCursor(0,1);
lcd.print("Silakan Masuk");
digitalWrite(8,1);
digitalWrite(9,1);
delay(200);
digitalWrite(9,0);
delay(200);
digitalWrite(9,1);
delay(200);
digitalWrite(9,0);
cnt=0;
fkpd=0;
s=0;
for(t=0;t<6;t++)pw_kpd[t]=' ';
delay(3000);
}
else {
lcd.clear();
lcd.print("Password Salah");
s++;
if(s < 3){
digitalWrite(9,1);
delay(2000);
digitalWrite(9,0);
lcd.clear();
lcd.print("Masukan Password");
lcd.setCursor(0,1);
cnt=0;
for(t=0;t<6;t++)
pw_kpd[t]=' ';
}
else if (s==3){
lcd.clear();
lcd.print("Anda 3x Salah");
lcd.setCursor(0,1);
lcd.print("Tunggu 5 Menit");
for(i=0;i<75;i++){
digitalWrite(9,1);
delay(2000);
digitalWrite(9,0);
delay(2000);
}
lcd.clear();
lcd.print("Masukan Password");
lcd.setCursor(0,1);
cnt=0;
s=0;
for(t=0;t<6;t++)pw_kpd[t]=' ';
}
}
}
else if((cnt==6)&&(menu==1)){
if((pw1==pw_kpd[0])&&(pw2==pw_kpd[1])&&(pw3==pw_kpd[2])&&(pw4==pw_kpd[3])&&(pw5==pw_kpd[4])&&(pw6==pw_kpd[5])){
lcd.clear();
lcd.print("Password Benar");
lcd.setCursor(0,1);
delay(2000);
lcd.clear();
lcd.print("PW baru:");
cnt=0;
menu=2;
s=0;
for(t=0;t<6;t++)pw_kpd[t]=' ';
}
else {
s++;
if(s < 3){
lcd.clear();
lcd.print("Password Salah");
cnt=0;
delay(2000);
lcd.clear();
lcd.print("Ganti Password");
lcd.setCursor(0,1);
lcd.print("PW lama=");
for(t=0;t<6;t++)pw_kpd[t]=' ';
}
else if (s==3){
lcd.clear();
lcd.print("Anda 3x Salah");
lcd.setCursor(0,1);
lcd.print("Tunggu 5 Menit");
for(i=0;i<75;i++){
digitalWrite(9,1);
delay(2000);
digitalWrite(9,0);
delay(2000);
}
lcd.clear();
lcd.print("Ganti Password");
lcd.setCursor(0,1);
lcd.print("PW lama=");
cnt=0;
s=0;
for(t=0;t<6;t++)pw_kpd[t]=' ';
}
}
}
}
void entri_password(){
lcd.print(char(key));
pw_kpd[cnt]=key;
cnt++;
if(cnt==6){
lcd.setCursor(0,1);
lcd.print("D=save,C=cancel");
menu=3;
cnt=0;
}
}

How it Works

1. Connect the Arduino with Peripherals needed
2. Plug in the Power Source on the device
3. Compile and upload the script program above to your arduino
4. POWER SUPPLY DO NOT EXCHANGE BETWEEN 12V AND 9V !!!

5. MAXIMUM FOR SELENOID OPEN (UNLOCK) IS 60 SECONDS !!! TURN ON SELENOID FOR

MORE THAN 60 SECOND CAN CAUSE SELENOID BROKEN !!! (DEPENDS ON SOLENOID

WHICH YOU USE)

6. LCD Initial display

Electric Key

with Password

7. Next will appear command to lock (selenoid active)

Lock Please

Press #

8. Press the hastage (#) button to lock it.

The door is locked

9. On locked door condition. To open it required a password that is a combination of 6 digit numbers
are entered through the keypad

Enter the password

10. For the initial password value, the password code is "111111" (number 1 six times). Press "1"
number 6 times

Enter the password

11. If the password is correct then it will appear

Password is correct

Please enter

12. The buzzer will also rang : "beep - beep", then the active relay and selenoid will open.
13. If the password you've entered is incorrect

Incorrect Password

The buzzer will rang: "beep .........(With long periode) " then you are prompted to enter the
password again

Enter the password

14. The chance of entering a password is 3 times. If it is 3 times the password is inccorrect, then it must wait 5 minutes to be able to enter password again