backgorund story

this is small project, i need modul that able to show simple text via serial into cheap LCD display 16 chars x 2 lines.

i just need it for displaying info from such as another arduino via serial port as monitor status.

this is open source open hardware you can download and mod it for better next version, only $5 10 pcs, LCD shield merged with atmega328 

source code . i got from examples Arduino IDE, looks like this :

/*

 LiquidCrystal Library - Serial Input

 Demonstrates the use a 16x2 LCD display. The LiquidCrystal

 library works with all LCD displays that are compatible with the

 Hitachi HD44780 driver. There are many of them out there, and you

 can usually tell them by the 16-pin interface.

 This sketch displays text sent over the serial port

 (e.g. from the Serial Monitor) on an attached LCD.

 The circuit:

 * LCD RS pin to digital pin 12

 * LCD Enable pin to digital pin 11

 * LCD D4 pin to digital pin 5

 * LCD D5 pin to digital pin 4

 * LCD D6 pin to digital pin 3

 * LCD D7 pin to digital pin 2

 * LCD R/W pin to ground

 * 10K resistor:

 * ends to +5V and ground

 * wiper to LCD VO pin (pin 3)

 Library originally added 18 Apr 2008

 by David A. Mellis

 library modified 5 Jul 2009

 by Limor Fried (http://www.ladyada.net)

 example added 9 Jul 2009

 by Tom Igoe

 modified 22 Nov 2010

 by Tom Igoe

 modified 7 Nov 2016

 by Arturo Guadalupi

 This example code is in the public domain.

 http://www.arduino.cc/en/Tutorial/LiquidCrystalSerialDisplay

*/

// include the library code:

#include <LiquidCrystal.h>

// initialize the library by associating any needed LCD interface pin

// with the arduino pin number it is connected to

const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {

 // set up the LCD's number of columns and rows:

 lcd.begin(16, 2);

 // initialize the serial communications:

 Serial.begin(9600);

}

void loop() {

 // when characters arrive over the serial port...

 if (Serial.available()) {

  // wait a bit for the entire message to arrive

  delay(100);

  // clear the screen

  lcd.clear();

  // read all the available characters

  while (Serial.available() > 0) {

   // display each character to the LCD

   lcd.write(Serial.read());

  }

 }

}