I have looked around the Forum for answers and not sorted as yet.
I did find this post http://arduino.cc/forum/index.php/topic,93757.0.html
But that is OK with the liquidcrystal_I2C.h and the liquidcrystal_I2C.ccp files
LiquidCrystal_I2C lcd(0x27,16,2); // set the LCD address to 0x27 for a 16 chars and 2 line display
lcd.init(); // initialize the lcd
// Print a message to the LCD.
The code above is what I am using ..I know that I will need to change the LCD sise to 20X4.
I cannot cut and past the Error compliling message .So typing then in :-In file included from helloworld.cpp:3:
C:\bla bla libraries\liquidcrystal_I2C/liquidcrystal_I2C.h:81:error conflicting return type specified for 'virtual void liquidcrystal_I2C::write(units8_t)'
C:bla bla \hardware\arduino\cores\arduino/print.h:48:error: overriding 'virtual size_t print::write(units9_t)'
Any help please