Incorporating a 4 digit password to a 4x4 keypad, saying Correct to Serial monitor if correct or Incorrect if the password is not right

Projects General Guidance
1

void setup() {
// put your setup code here, to run once:
DDRD=0xff;
DDRB=0x00;
PORTB=0xff;
Serial.begin(115200);
}
String key = "";

String board() {
key="";

PORTD=0b11111011;
//Serial.println(PORTB,BIN);
if(PINB==0b111110)
{Serial.println("D");key="D";}
if(PINB==0b111101)
{Serial.println("C");key="C";}
if(PINB==0b111011)
{Serial.println("B");key="B";}
if(PINB==0b110111)
{Serial.println("A");key="A";}
while(PINB !=0b111111);

PORTD=0b11110111;
//Serial.println(PINB,BIN);
if(PINB==0b111110)
{Serial.println("#");key="#";}
if(PINB==0b111101)
{Serial.println("9");key="9";}
if(PINB==0b111011)
{Serial.println("6");key="6";}
if(PINB==0b110111)
{Serial.println("3");key="3";}
while(PINB !=0b111111);

PORTD=0b11101111;
//Serial.println(PINB,BIN);
if(PINB==0b111110)
{Serial.println("0");key="0";}
if(PINB==0b111101)
{Serial.println("8");key="8";}
if(PINB==0b111011)
{Serial.println("5");key="5";}
if(PINB==0b110111)
{Serial.println("2");key="2";}
while(PINB !=0b111111);

PORTD=0b11011111;
//Serial.println(PINB,BIN);
if(PINB==0b111110)
{Serial.println("");key="";}
if(PINB==0b111101)
{Serial.println("7");key="7";}
if(PINB==0b111011)
{Serial.println("4");key="4";}
if(PINB==0b110111)
{Serial.println("1");key="1";}
while(PINB !=0b111111);
///delay(500);
return key;
}

void password(String key){

if(key == "#")
{Serial.println("Enter Password");
String passkey="";
for(int i=0;i<4;i++)
{
while(PINB==0b111111);
String key1=board();
passkey+=key1;
delay(10);

}
Serial.println(passkey);
key="";

}
}

//////////////////////////////////////////////////
This is the .h library

#include "board.h"

void loop(){
String key=board();
password(key);
key="";
}

2

Code tags please! Read the forum guide in the sticky post!

3

Please also post 'board.h' in code tags.

4

The problem writing code in this manner is it makes it very hard to spot errors and doesn’t really give any benefit over the simplier high level C type stuff .

5

Why don't you use the Keypad library? Your code would be much more readable and much easier to debug.

6

Except as an academic assignment, which is probably what it is.

1 Like
7

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.