Written by Weng Fei in Arduino

Arduino Keyboard Password

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This time, I've made another project on my Arduino Uno. This time it's about customizable passwords that I can program on it. I've used a bare connection to the:

Arduino Uno

to make my project work again. Below would be the sketch for this project :

int serial_in;
int no;
int code;
int a;
int b;
int c;

void setup()
{
Serial.begin(9600);
}

void loop()
{
if(Serial.available()){ // wait until there was signal send from computer
serial_in = Serial.read(); // Receive signal in ASCII
no++;
if(code==123){ // password is 123
Serial.print("ACCESS CLEAR PASSWORD:");
Serial.println(code);
}
else{
Serial.print("ACCESS DENIED PASSWORD:");
Serial.println(code);
}
}

code=100*a+10*b+c;

if(no==1){
switch(serial_in){
case '0':
a=0;
break;
case '1':
a=1;
break;
case '2':
a=2;
break;
case '3':
a=3;
break;
case '4':
a=4;
break;
case '5':
a=5;
break;
case '6':
a=6;
break;
case '7':
a=7;
break;
case '8':
a=8;
break;
case '9':
a=9;
break;
}
}
if(no==3){
switch(serial_in){
case '0':
b=0;
break;
case '1':
b=1;
break;
case '2':
b=2;
break;
case '3':
b=3;
break;
case '4':
b=4;
break;
case '5':
b=5;
break;
case '6':
b=6;
break;
case '7':
b=7;
break;
case '8':
b=8;
break;
case '9':
b=9;
break;
}
}
if(no==5){
switch(serial_in){
case '0':
c=0;
break;
case '1':
c=1;
break;
case '2':
c=2;
break;
case '3':
c=3;
break;
case '4':
c=4;
break;
case '5':
c=5;
break;
case '6':
c=6;
break;
case '7':
c=7;
break;
case '8':
c=8;
break;
case '9':
c=9;
break;
}
}

}

And how does it work? Check out the video below! Enjoy