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+.. _arduino-serial:
+
+Serial
+======
+
+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): **Serial**. 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.
+
+
+
+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().
+
+
+
+The Arduino Mega has three additional serial ports: **Serial1** on
+pins 19 (RX) and 18 (TX), **Serial2** on pins 17 (RX) and 16 (TX),
+**Serial3** on pins 15 (RX) and 14 (TX). To use these pins to
+communicate with your personal computer, you will need an
+additional USB-to-serial adaptor, as they are not connected to the
+Mega's USB-to-serial adaptor. To use them to communicate with an
+external TTL serial device, connect the TX pin to your device's RX
+pin, the RX to your device's TX pin, and the ground of your Mega to
+your device's ground. (Don't connect these pins directly to an
+RS232 serial port; they operate at +/- 12V and can damage your
+Arduino board.)
+
+
+
+Functions
+---------
+
+
+-  `begin <http://arduino.cc/en/Serial/Begin>`_\ ()
+-  `end <http://arduino.cc/en/Serial/End>`_\ ()
+-  `available <http://arduino.cc/en/Serial/Available>`_\ ()
+-  `read <http://arduino.cc/en/Serial/Read>`_\ ()
+-  `flush <http://arduino.cc/en/Serial/Flush>`_\ ()
+-  `print <http://arduino.cc/en/Serial/Print>`_\ ()
+-  `println <http://arduino.cc/en/Serial/Println>`_\ ()
+-  `write <http://arduino.cc/en/Serial/Write>`_\ ()
+
+
+
+Examples
+--------
+
+
+-  `ASCII Table <http://arduino.cc/en/Tutorial/ASCIITable>`_
+-  `Dimmer <http://arduino.cc/en/Tutorial/Dimmer>`_
+-  `Graph <http://arduino.cc/en/Tutorial/Graph>`_
+-  `Physical Pixel <http://arduino.cc/en/Tutorial/PhysicalPixel>`_
+-  `Virtual Color Mixer <http://arduino.cc/en/Tutorial/VirtualColorMixer>`_
+-  `Serial Call Response <http://arduino.cc/en/Tutorial/SerialCallResponse>`_
+-  `Serial Call Response ASCII <http://arduino.cc/en/Tutorial/SerialCallResponseASCII>`_
+