Ok I found the serial monitor thing....I have an I2C device at 0x3F which is cool now I'm getting somewhere...
But I upload my simple code here: and the LCD backlight just blinks...no characters still....what am I missing??
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x3F,20,4);
void setup()
{
lcd.init();
lcd.backlight();
lcd.setCursor(0, 0);
lcd.print("Hello");
lcd.setCursor(0, 1);
lcd.print("World ");
}
void loop()
{
}