* IOlcd lcd;                             // what this does is allow you to run multiple instance's, meening you can controle more lcd's if you want like IOlcd lcd2;
* print();                               // prints any thing you put between the (), put strings in like this "string" and for variables just the name of the variable.
* home();                                // sets cursor first place first line.
* write(data);                           // writes data to lcd example: write(33); would print ! on the lcd.
* setCursor(int x,int y);                // x is columns and y is rows.
* blinkCursor();                         // sets cursor active, blinking square for now.
* noBlinkCursor();                       // sets cursor inactive, no blinking square visible.
* clear();                               // clears the screen.
* createChar();                          // posted an example on how to use it'll clear things up :) remember only place for 8 custom chars..
* scrollDisplayRight();                  // scrolls the contents of the display 1 square to the right every time the function is called.
* scrollDisplayLeft();                   // does the opposite scrolls the contents of the display 1 to the right every time it's called.
* begin(int x, int y);                   // x is the number of columns the display has, and y the number of rows.
* init(address, chip);                   // initializes the IOexpander chipt, address for it's address, and chip for the chip you use 
                                         // mcp23016 mcp23017 mcp23018 are supported but not tested. only mcp23016 is tested, example: init(0x20, MCP23017);
                                         // for now the library only supports 16x2 Liquid Crystal Displays.

//include the nesecary header files for this to work.
 
#include <IOlcd.h>
#include <Wire.h>;
 
IOlcd lcd;
long count = 1;
 
void setup(){
 
  lcd.init(0x20, MCP23016);                 //initialize the chip(in this case MCP23016) at address 0x20
 
  lcd.begin(16,2);                          //start the lcd
 
  lcd.home();                               //start at the beginning of the first lcd line.
 
  lcd.print("Hello, World!");               //print hello world to the first line.
}
 
void loop(){
 
  lcd.setCursor(0,1);                       //set cursor to the second line.
 
  lcd.print(count);                         //number of seconds active, is printed.
  count++;
  delay(1000);
}

/* quick note, more then 16 characters send
the line won't wrap to the line underneath it. */
 
#include <IOlcd.h>
#include <Wire.h>;
 
IOlcd lcd;
 
void setup(){
 
  lcd.init(0x20, MCP23016);                 //initialize the chip(MCP23016) at address 0x20.
 
  lcd.begin(16,2);                          //start the lcd
 
  Serial.begin(9800);                       //start serial connection.
}
 
void loop(){
 
  if(Serial.available()){                   // check if characters arrive over the serial port.
 
    delay(100);                             //wait a bit.
 
    lcd.clear();                            //clear the screen.
 
    while(Serial.available() > 0){          //read the data.
 
      lcd.write(Serial.read());             //write data to the lcd.
    }
  }
}

#include <IOlcd.h>
#include <Wire.h>
 
IOlcd lcd;
 
//here we create an array that contains the actual data that's
//going to display a smiley, you see it even looks like it.
byte smiley[8] = {
  B00000,
  B10001,
  B00000,
  B00000,
  B10001,
  B01110,
  B00000,
};
 
 
void setup() {
  //it's important to always first initialize the IO chip.
  lcd.init(0x20, MCP23016);
  //and it's also imporant to create the char before you even 
  //start the lcd.
  lcd.createChar(0, smiley);
  //here we start the lcd like normal
  lcd.begin(16, 2);
  //we set cursor "home", and clearing maybe previous rubish on screen
  lcd.home();
  lcd.clear();
  //we write the costum char. first int in createChar is memory addres.
  //when you write that memory address with lcd.write you'l print it on 
  // the lcd.
  lcd.write(0);
}
 
void loop() {}