Arduino Uno Quick Start Manual page 47

Changing Preferences 27
Load the blinking LED sketch from Chapter 1, Welcome to the Arduino, on
page 3, and compile it again. The output in the message panel should look
like this:
Note that the IDE updates some of the Preferences values when it shuts down.
So before you change any preferences directly in the preferences.txt file, you
have to stop the Arduino IDE.
Now that you re familiar with the Arduino IDE, let s do some programming.
We ll make the Arduino talk to the outside world.
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