Code for Led Keypad
// LED On using Keypad #include <Keypad.h> #define ROW_NUM 4 // four rows #define COLUMN_NUM 4 // four columns char keys[ROW_NUM][COLUMN_NUM] = { {'1', '2', '3', 'A'}, {'4', '5', '6', 'B'}, {'7', '8', '9', 'C'}, {'*', '0', '#', 'D'} }; byte pin_rows[ROW_NUM] = {13, 12, 11, 10}; //connect to the row pinouts of the keypad byte pin_column[COLUMN_NUM] = {9, 8, 7, 6}; Keypad keypad = Keypad( makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM ); void setup() { // put your setup code here, to run once: Serial.begin(9600); pinMode(0, OUTPUT); pinMode(1, OUTPUT); pinMode(12, OUTPUT); pinMode(13, OUTPUT); } void loop() { // put your main code here, to run repeatedly: char key = keypad.getKey(); if (key) { Serial.println(key); if(key == '2'){ digitalWrite(13, ...