How to Interface 16x2 LCD with Arduino

1/*
2  LiquidCrystal Library - Hello World
3
4 Demonstrates the use  a 16x2 LCD display.  The LiquidCrystal
5 library works with all LCD displays that  are compatible with the
6 Hitachi HD44780 driver. There are many of them out there,  and you
7 can usually tell them by the 16-pin interface.
8
9 This sketch prints  "Hello World!" to the LCD
10 and shows the time.
11
12  The circuit:
13 *  LCD RS pin to digital pin 12
14 * LCD Enable pin to digital pin 11
15 * LCD D4  pin to digital pin 5
16 * LCD D5 pin to digital pin 4
17 * LCD D6 pin to digital  pin 3
18 * LCD D7 pin to digital pin 2
19 * LCD R/W pin to ground
20 * LCD VSS  pin to ground
21 * LCD VCC pin to 5V
22 * 10K resistor:
23 * ends to +5V and  ground
24 * wiper to LCD VO pin (pin 3)
25
26 Library originally added 18 Apr  2008
27 by David A. Mellis
28 library modified 5 Jul 2009
29 by Limor Fried (http://www.ladyada.net)
30  example added 9 Jul 2009
31 by Tom Igoe
32 modified 22 Nov 2010
33 by Tom Igoe
34  modified 7 Nov 2016
35 by Arturo Guadalupi
36
37 This example code is in the  public domain.
38
39 http://www.arduino.cc/en/Tutorial/LiquidCrystalHelloWorld
40
41*/
42
43//  include the library code:
44#include <LiquidCrystal.h>
45
46// initialize the  library by associating any needed LCD interface pin
47// with the arduino pin number  it is connected to
48const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
49LiquidCrystal  lcd(rs, en, d4, d5, d6, d7);
50
51void setup() {
52  // set up the LCD's number  of columns and rows:
53  lcd.begin(16, 2);
54  // Print a message to the LCD.
55  lcd.print("hello, world!");
56}
57
58void loop() {
59  // set the cursor  to column 0, line 1
60  // (note: line 1 is the second row, since counting begins  with 0):
61  lcd.setCursor(0, 1);
62  // print the number of seconds since reset:
63  lcd.print(millis() / 1000);
64}
65
66