title: Arduino LCD not working
body: <p>I am getting crazy on my first LCD example. <br> I use an Arduino Uno and I'd like to try the LCD screen with the easiest example: the <a href="http://arduino.cc/en/Tutorial/LiquidCrystal" rel="noreferrer">Hello World</a> LiquidCrystal example.<br>
  I connected the pins in the same way as the example above but the LCD first shows 16 "inverted spaces" in first line and nothing in second line. <br>
  Here is my code (exactly the same as the example):</p>
  
  <pre><code>LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
  void setup() {
      lcd.begin(16, 2);
      lcd.print("hello, world!");
   }
  
  void loop() {
      lcd.setCursor(0, 1);
      lcd.print(millis()/1000);
  }
  </code></pre>
  
  <p>Does anyone know something about this issue?</p>