Arduino_XY_hacks/LiquidCrystal_I2C_Frank_de_Brabander.ino

/*
I am using the LiquidCrystal_I2C.h lib which points to
https://github.com/johnrickman/LiquidCrystal_I2C/tree/master
and it is authored by (in version IDE 2.3.2):
Frank de Brabander

when searvching fot LiquidCrystal_I2C in the Library Manager*/ 

/* Note:

i2c, unlike the Serial Port Protocol allowd for 
multiple clock speeds to be used so, we have an extra wire
to set the clock. Thus we need two GPIOs:
one for data (SDA) and another for the clock (SCL)
in Arduino UNO the GPIOs are
A4 for SDA
A5 for SCL
so we need to connect these to the i2c controller
behind the LCD display
*/

#include <LiquidCrystal_I2C.h>

// initialize the library
LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display

void setup()
{
  lcd.init();                      // initialize the lcd 
  // Print a message to the LCD.
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("Hola, welcome to");
  lcd.setCursor(3,1);
  lcd.print("X-Institute!");
}


void loop()
{
// nothing
}