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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>Arduino - Read </title>
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<div class="title"><a href="http://www.arduino.cc"/>Arduino</a></div>
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<h2>int Serial.read()</h2>
<h4>Description</h4>
<p>Reads incoming serial data.
</p>
<p class='vspace'></p><h3>Parameters</h3>
<p>None
</p>
<p class='vspace'></p><h4>Returns</h4>
<p>the first byte of incoming serial data available (or -1 if no data is available) <em>int</em>
</p>
<p class='vspace'></p><h3>Example</h3>
<pre>
int incomingByte = 0; // for incoming serial data
void setup() {
Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
}
void loop() {
// send data only when you receive data:
if (Serial.available() &gt; 0) {
// read the incoming byte:
incomingByte = Serial.read();
// say what you got:
Serial.print("I received: ");
Serial.println(incomingByte, DEC);
}
}
</pre>
<p class='vspace'></p><h4>See also</h4>
<ul><li><a class='wikilink' href='Serial_Begin.html'>Serial.begin</a>(speed)
</li><li><a class='wikilink' href='Serial_Available.html'>Serial.available</a>()
</li><li><a class='wikilink' href='Serial_Print.html'>Serial.print</a>(data)
</li><li><a class='wikilink' href='Serial_Println.html'>Serial.println</a>(data)
</li></ul><p class='vspace'></p><p><a class='wikilink' href='index.html'>Reference Home</a>
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