Libraries \ Keypad

Reference for Wiring version 1.0 Build 0100+ If you have a previous version, use the reference included with your software. If see any errors or have any comments, let us know.

Class

Keypad

Name

getKey()

Examples
#include <Keypad.h>

const byte ROWS = 4; //four rows
const byte COLS = 3; //three columns
char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'#','0','*'}
};
byte rowPins[ROWS] = {5, 4, 3, 2}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {8, 7, 6}; //connect to the column pinouts of the keypad

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

void setup(){
  Serial.begin(9600);
}
  
void loop(){
  char key = keypad.getKey();
  
  if (key != NO_KEY){
    Serial.println(key);
  }
}
Description Returns the keycode of the pressed key, or NO_KEY if no key is pressed. The keycode is retrieved from the keymap array.
Syntax
getKey()
Returns None
Usage Application
Updated on July 07, 2011 11:10:29pm PDT

Creative Commons License