/*
* Original sourse: https://playground.arduino.cc/Code/Keypad
* This is the Arduino code for 4x4 black keypad
* watch the video for details and demo https://youtu.be/1rfrvOTxtrg
* *
* Written by Ahmad S. for Robojax Video channel www.Robojax.com
* Date: April 15, 2018, in Ajax, Ontario, Canada
* Permission granted to share this code given that this
* note is kept with the code.
* Disclaimer: this code is "AS IS" and for educational purpose only.
* this code has been downloaded from http://robojax.com/learn/arduino/
*
*/
/* @file HelloKeypad.pde
|| @version 1.0
|| @author Alexander Brevig
|| @contact alexanderbrevig@gmail.com
||
|| @description
|| | Demonstrates the simplest use of the matrix Keypad library.
|| #
*/
#include <Keypad.h>
const byte ROWS = 4; //four rows
const byte COLS = 4; //three columns
char keys[ROWS][COLS] = {
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}
};
// connect the pins from right to left to pin 2, 3, 4, 5,6,7,8,9
byte rowPins[ROWS] = {5,4,3,2}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {9,8,7,6}; //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();
// just print the pressed key
if (key){
Serial.print("Key ");
Serial.print(key);
Serial.println(" is pressed");
}
// this checks if 4 is pressed, then do something. Here we print the text but you can control something.
if (key =='4'){
// do something here is 4 is pressed
Serial.println("Key 4 is pressed -> Action");
}
}
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