Alarm Pt.1

/* The LCD circuit:
 * LCD pin 1 to ground
 * LCD pin 2 to 5V
 * LCD RS pin 4 to digital pin 12
 * LCD R/W pin 5 to ground
 * LCD Enable pin 6 to digital pin 11
 * LCD D4 pin 11 to digital pin 5
 * LCD D5 pin 12 to digital pin 4
 * LCD D6 pin 13 to digital pin 3
 * LCD D7 pin 14 to digital pin 2
 * LCD pin 15 to 5v with 220ohm resistor
 * LCD pin 16 to ground
 *
 * 10K pot:
 *   one end to +5V and the other to ground
 *   wiper (middle pin) to LCD pin 3
 */

// include the library code:
#include <LiquidCrystal.h>

// include the keypad code:
#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','#'}
};
//  keypad1 > pin13
//  keypad2 > pin10
//  keypad3 > pin9
//  keypad4 > pin8
//  keypad5 > pin7
//  keypad6 > pin6
//  keypad7 > pin0
byte rowPins[ROWS] = {10, 0, 6, 8}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {9, 13, 7}; //connect to the column pinouts of the keypad

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

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);

  // Print a message to the LCD.
  lcd.print("Enter code:");
}

void loop() {
  // set the cursor to column 0, line 1
  // line 0 is the first row, line 1 is the second row
  lcd.setCursor(0, 1);

  char key = keypad.getKey();
  if (key != NO_KEY){
      lcd.print(key);    // print keypress to LCD
  }
}