Arduino works with LCD 1602.

Forum 2005-2010 (read only) General Exhibition
1

This little project is to make your arduino board display words on LCD1602,

#include <LiquidCrystal.h>

// LiquidCrystal display with:
// rs on pin 12
// rw on pin 11
// enable on pin 10
// d4, d5, d6, d7 on pins 5, 4, 3, 2
LiquidCrystal lcd(12, 11, 10, 5, 4, 3, 2);
int ledPin = 13;                // LED connected to digital pin 13
int recvPin=0;
int wait=1000;
int val=0;
void setup()
{
  // Print a message to the LCD.
  
   pinMode(ledPin, OUTPUT);      // sets the digital pin as output
  Serial.begin(9600);
  lcd.print(" Hello,GE-TH!!");
}

void loop()
{
  digitalWrite(ledPin, HIGH);   // sets the LED on
  delay(wait);                  // waits for a second
  digitalWrite(ledPin, LOW);    // sets the LED off
  delay(wait);                  // waits for a second
  val=analogRead(recvPin);
  Serial.print("DETECT:");
  Serial.println(val);
  
}

Note: this is different from the diagram on arduino.cc(just a little bit)

// rs on pin 12
// rw on pin 11
// enable on pin 10

More info from ww.ge-th.com