ARDUINO KEYPAD4X4 KEYBOARD SERIAL #2 SOURCE CODE EXPLAIN

ARDUINO KEYPAD4X4 KEYBOARD SERIAL #2 SOURCE CODE EXPLAIN

27/3/2562 SONGCHAI PRAPATRUNGSEE

ARDUINO KEYPAD4X4 KEYBOARD SERIAL #2 SOURCE CODE EXPLAIN

รายการอุปกรณ์

ARDUION UNO R3   1PCS.

KEYPAD 4X4           1PCS.

JUMPER M/M          8PCS.

/////////////////////////////////////////////////////////////////

#include <Keypad.h>

//2dimension array save the keypad characters

char KEY[4][4] =

{

 {'1', '2', '3', 'A'},

 {'4', '5', '6', 'B'},

 {'7', '8', '9', 'C'},

 {'*', '0', '#', 'D'}

};

byte ROW[4]={9, 8, 7, 6};//CONNECT ROW PINOUTS OF KEYPAD

byte COL[4]={5, 4, 3, 2};//CONNECT COLUMN PINOUTS OF KEYPAD

/*In code, use Keypad class provided by the Keypad library to operate keypad. The following is to

instantiate a keypad object, and the last two parameter represents the number of the row and column of the

keypad*/

Keypad KPAD=Keypad(makeKeymap(KEY),ROW,COL,4,4);

void setup()

{

 Serial.begin(9600);//INITIALIZE SERIAL PORT. SET BAUD RATE 9600

 Serial.println("TEST KEYPAD!");//PRINT "TEST KEYPAD!"

}

void loop()

{

char PRESS = KPAD.getKey();

if (PRESS)

{

 Serial.print(PRESS);

}

}