![Arduino Yun Manual Download Page 6](http://html1.mh-extra.com/html/arduino/yun/yun_manual_2966336006.webp)
ATmega8U2 or ATmega16U2 processor). This difference has implications for driver
installation, uploading, and communication.
No reset when you open the serial port.
The Yún won't restart your sketch when you open a serial port on the computer. That means you
won't see serial data that's already been sent to the computer by the board, including, for
example, most data sent in setup().
This also applies to the Console, described below.
This means that if you're using any Serial or Console print(), println() or write() statements in
setup(), they won't show up when you open the serial monitor or Console connection. To work
around this, you can check to see if the port is open like so:
// stops the program until Serial Monitor is opened
while (!Serial) ;
[Get Code]
or
// stops the program until Console is opened
while (!Console) ;
[Get Code]
Installing Drivers for the Yún
OSX
The first time you plug a Yún into a Mac, the "Keyboard Setup Assistant" will launch.
There's nothing to configure with the Yún; you can close this dialogue by clicking the red
button in the top left of the window.