Reference Language (extended) | Libraries | Comparison | Board
Sets a pin configured as OUTPUT to either a HIGH or a LOW state at the specified pin.
The digitalWrite() function is also used to set pullup resistors when a pin is configured as an INPUT.
pin: the pin number
value: HIGH or LOW
none
int ledPin = 13; // LED connected to digital pin 13 void setup() { pinMode(ledPin, OUTPUT); // sets the digital pin as output } void loop() { digitalWrite(ledPin, HIGH); // sets the LED on delay(1000); // waits for a second digitalWrite(ledPin, LOW); // sets the LED off delay(1000); // waits for a second }
Sets pin 13 to HIGH, makes a one-second-long delay, and sets the pin back to LOW.
The analog input pins can also be used as digital pins, referred to as numbers 14 (analog input 0) to 19 (analog input 5).
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