[Digital I/O]


Reads the value from a specified digital pin, either HIGH or LOW.




pin: the number of the digital pin you want to read (int)



Example Code

Sets pin 13 to the same value as pin 7, declared as an input.

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


If the pin isn’t connected to anything, digitalRead() can return either HIGH or LOW (and this can change randomly).

Unlike Arduino, the analog input pins (referred to as A0, A1, etc) of 86Duino cannot be used as digital pins.

See also

Language Reference Home

The text of the 86Duino reference is a modification of the Arduino reference and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.

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