KEYPAD LIBRARY

Projects Programming
1

hello evrybody i want to know how i can command the time of function key=mykeypad.waitForKey();
because the programm still not working untill i press a button
sorry for The language :slight_smile:

2

i want to know how i can command the time of function

Simple. Don't use waitForKey() if you don't want to wait indefinitely.

because the programm still not working

What program?

3

void loop() {
flag = true;

lcd.clear();
lcd.print("Password:");

for(int i = 0; i < sizeof(password); i++){

char key = myKeypad.waitForKey();
if(key != password*){*

  • flag = false; *
  • }*

_ lcd.print("*");_

  • }*
    the program still not working untill i press a key button but i would to make a method to limit the waitForKey in (10s) :frowning:
5

Can you please clarify more :slight_smile:

7

so how the program becomes

9

Code tags please! Thanks - Moderator.

#include <LiquidCrystal.h>
#include <Keypad.h>

// Keypad
const byte ROWS = 4; //four rows
const byte COLS = 3; //four columns

//define the cymbols on the buttons of the keypads
char keymap[ROWS][COLS] = {
 {'1','2','3'},
 {'4','5','6'},
 {'7','8','9'},
 {'*','0','#'}
};

byte rowPins[ROWS] = {0, 1, 2, 3}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {4, 5, 6}; //connect to the column pinouts of the keypad

//initialize an instance of class NewKeypad
Keypad myKeypad = Keypad( makeKeymap(keymap), rowPins, colPins, ROWS, COLS);


// create and initialize the LCD object
// LiquidCrystal(rs, enable, d4, d5, d6, d7)
LiquidCrystal lcd(8, 9, 10, 11, 12, 13);

char password[] = {'0', '0', '0','0', '0', '0'};
boolean flag;

void setup() {  
 lcd.begin(16, 2);  
 lcd.cursor();
}

void loop() {
 flag = true;
 
 lcd.clear();
 lcd.print("Password:");
 
 for(int i = 0; i < sizeof(password); i++){
   
   char key = myKeypad.waitForKey();
   if(key != password[i]){
     flag = false;  
   }
   
   lcd.print("*");
   
 }

 lcd.setCursor(0 ,1);
 
 if(flag == false){    
   lcd.print("Incorrect !!");
 }else{
   lcd.print("Correct");
 }

 delay(300);
}

this is all of the sketch but the proble is how ican make a delay when Lack of pressure because the function waitForKey interrupt them to make delay