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<div class="title"><a href="http://www.arduino.cc"/>Arduino</a></div>
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<p><strong>Reference</strong> &nbsp; <a class='wikilink' href='index.html'>Language</a> (<a class='wikilink' href='Extended.html'>extended</a>) | <a class='wikilink' href='Libraries.html'>Libraries</a> | <a class='wikilink' href='Comparison.html'>Comparison</a>
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<p class='vspace'></p><h2>Serial</h2>
<p>Used for communication between the Arduino board and a computer or other devices. All Arduino boards have at least one serial port (also known as a UART or USART): <strong>Serial</strong>. It communicates on digital pins 0 (RX) and 1 (TX) as well as with the computer via USB. Thus, if you use these functions, you cannot also use pins 0 and 1 for digital input or output.
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<p class='vspace'></p><p>You can use the Arduino environment's built-in serial monitor to communicate with an Arduino board. Click the serial monitor button in the toolbar and select the same baud rate used in the call to begin().
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<p class='vspace'></p><p>The Arduino Mega has three additional serial ports: <strong>Serial1</strong> on pins 19 (RX) and 18 (TX), <strong>Serial2</strong> on pins 17 (RX) and 16 (TX), <strong>Serial3</strong> on pins 15 (RX) and 14 (TX).
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<p class='vspace'></p><h4>Functions</h4>
<ul><li><a class='wikilink' href='Serial_Begin.html'>begin</a>()
</li><li><a class='wikilink' href='Serial_Available.html'>available</a>()
</li><li><a class='wikilink' href='Serial_Read.html'>read</a>()
</li><li><a class='wikilink' href='Serial_Flush.html'>flush</a>()
</li><li><a class='wikilink' href='Serial_Print.html'>print</a>()
</li><li><a class='wikilink' href='Serial_Println.html'>println</a>()
</li><li><a class='wikilink' href='Serial_Write.html'>write</a>()
</li></ul><p class='vspace'></p><h4>Examples</h4>
<ul><li><a class='wikilink' href='http://arduino.cc/en/Tutorial/ASCIITable'>ASCII Table</a>
</li><li><a class='wikilink' href='http://arduino.cc/en/Tutorial/Dimmer'>Dimmer</a>
</li><li><a class='wikilink' href='http://arduino.cc/en/Tutorial/Graph'>Graph</a>
</li><li><a class='wikilink' href='http://arduino.cc/en/Tutorial/PhysicalPixel'>Physical Pixel</a>
</li><li><a class='wikilink' href='http://arduino.cc/en/Tutorial/VirtualColorMixer'>Virtual Color Mixer</a>
</li><li><a class='wikilink' href='http://arduino.cc/en/Tutorial/SerialCallResponse'>Serial Call Response</a>
</li><li><a class='wikilink' href='http://arduino.cc/en/Tutorial/SerialCallResponseASCII'>Serial Call Response ASCII</a>
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<p class='vspace'></p><p><em>Corrections, suggestions, and new documentation should be posted to the <a class='urllink' href='http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?board=swbugs' rel='nofollow'>Forum</a>.</em>
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<p class='vspace'></p><p>The text of the Arduino reference is licensed under a
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