Teclado matricial 4 x 4 con while //

International Español
1

#include <Keypad.h>

const byte ROWS = 4; //four rows
const byte COLS = 4; //three columns

byte rowPins[ROWS] = {13,12,11,10}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {9,8,7,6}; //connect to the column pinouts of the keypad
char keys[ROWS][COLS] = {
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}
};
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

unsigned long loopCount;
unsigned long startTime;
String msg;

void setup() {
Serial.begin(9600);
loopCount = 0;
startTime = millis();
msg = "";
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
}

void loop() {
loopCount++;
if ( (millis()-startTime)>5000 ) {
startTime = millis();
loopCount = 0;
}

// Fills kpd.key[ ] array with up-to 10 active keys.
// Returns true if there are ANY active keys.
if (keypad.getKeys())
{
for (int i=0; i<LIST_MAX; i++) // Scan the whole key list.
{
if ( keypad.key*.stateChanged ) // Only find keys that have changed state.*

  • {*
    _ switch (keypad.key*.kstate) { // Report active key state : IDLE, PRESSED, HOLD, or RELEASED*_
    * case PRESSED:*
    * msg = " PRESSED.";*
    * break;*
    * case HOLD:*
    * msg = " HOLD.";*
    _ if(keypad.key*.kchar=='A'){
     digitalWrite(2,HIGH);}
    if(keypad.key.kchar=='B'){
    digitalWrite(3,HIGH);}
    break;
    case RELEASED:
    msg = " RELEASED.";
    digitalWrite(2,LOW);
    digitalWrite(3,LOW);*_

* break;*
* case IDLE:*
* msg = " IDLE.";*
* }*
* Serial.print("Key ");*
_ Serial.print(keypad.key*.kchar);
Serial.println(msg);
}
}
}
} // End loop*_

2

Por favor, tanto te cuesta escribir algo que explique lo que vas a hacer con ese código y si funciona o no como quieres?
Ni hablar de leer las normas del foro y postearlo debidamente usando etiquetas
Edita tu post por favor!!