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Keypad Library Functions problems #2134

@AleCarsa

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@AleCarsa

Hi guys, i'm working on a security box that use a keypad 4x3 matrix for the user inputs.
I want allow the user to change his password in this way :

  • Insert new password
  • press * for 3 seconds for confirm

Ok, the problem is the second one, because i'm trying to use the library's functions , like .getState() or .isPressed() , but all of them have a bug (i think), because if i press any button, the state of the pad changes into PRESSED (and it's ok), then if i release, the state still be PRESSED instead of RELEASED.
It's seems like the "refresh" doesn't read the pull-up, and the state remains in ground.

/* Utilizzo un keypad 4x3 e mando in output su seriale il tasto premuto */

/* NOTA : Per le variabili intere uso "byte" al posto di "int" perchè mi consente di risparmiare spazio, 1 byte al posto di 2 per "int". */

#include <Keypad.h>

const byte COLS = 3;
const byte ROWS = 4;

char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};

byte rowPins[4] = {8,7,6,5};  //connect to the row pinouts of the keypad
byte colPins[3] = {4,3,2};  //connect to the col pinouts of the keypad

// Creo un oggetto di tipo Keypad , dove specifico : mappa_tasti, pin_righe, pin_colonne, Num_righe, Num_colonne

Keypad pad = Keypad( makeKeymap(keys), rowPins,colPins,ROWS,COLS);  



void setup(){
 Serial.begin(9600);
 delay(1000);
 Serial.println(F("ready"));

 pad.waitForKey();

}


void loop(){


    if(pad.isPressed('1')){
      Serial.println("1");
    }else if(pad.isPressed('2')){
      Serial.println("2");
    }else if(pad.isPressed('3')){
      Serial.println("3");
    }


}

If there's someone that can be useful, please be.

Thank you all!

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