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+.. _arduino-digitalread:
+
+digitalRead()
+=============
+
+Description
+-----------
+
+Reads the value from a specified digital pin, either
+`HIGH <http://arduino.cc/en/Reference/Constants>`_ or
+`LOW <http://arduino.cc/en/Reference/Constants>`_.
+
+
+
+Syntax
+------
+
+digitalRead(pin)
+
+
+
+Parameters
+----------
+
+pin: the number of the digital pin you want to read (*int*)
+
+
+
+Returns
+-------
+
+`HIGH <http://arduino.cc/en/Reference/Constants>`_ or
+`LOW <http://arduino.cc/en/Reference/Constants>`_
+
+
+
+Example
+-------
+
+::
+
+     
+    int ledPin = 13; // LED connected to digital pin 13
+    int inPin = 7;   // pushbutton connected to digital pin 7
+    int val = 0;     // variable to store the read value
+    
+    void setup()
+    {
+      pinMode(ledPin, OUTPUT);      // sets the digital pin 13 as output
+      pinMode(inPin, INPUT);      // sets the digital pin 7 as input
+    }
+    
+    void loop()
+    {
+      val = digitalRead(inPin);   // read the input pin
+      digitalWrite(ledPin, val);    // sets the LED to the button's value
+    }
+
+
+
+Sets pin 13 to the same value as the pin 7, which is an input.
+
+
+
+Note
+----
+
+If the pin isn't connected to anything, digitalRead() can return
+either HIGH or LOW (and this can change randomly).
+
+
+
+The analog input pins can be used as digital pins, referred to as
+A0, A1, etc.
+
+
+
+See also
+--------
+
+
+-  `pinMode <http://arduino.cc/en/Reference/PinMode>`_\ ()
+-  `digitalWrite <http://arduino.cc/en/Reference/DigitalWrite>`_\ ()
+-  `Tutorial: Digital Pins <http://arduino.cc/en/Tutorial/DigitalPins>`_
+
+