I have button (second on image ) http://cooking-hacks.com/wp/wp-content/uploads/2012/10/Pulsador_panel_arduino.png
And i have connect first wire to pin 2 and also secod wire to ground.
I have button (second on image ) http://cooking-hacks.com/wp/wp-content/uploads/2012/10/Pulsador_panel_arduino.png
And i have connect first wire to pin 2 and also secod wire to ground.