digitalWrite(pin, value, [callback])

Write a HIGH or LOW to a digital I/O pin.

NOTE: The 4 USRx LEDs are all able to operate as digital output pins, giving you an always-available output to test your software.

Arguments

• pin: the BeagleBone pin identifier
• value: the logic level to set the pin
• callback: called upon completion

Return value

• true if successful
• false on failure

callback(x)

• x.err: error status message

Example run restore

var b = require('bonescript');
b.pinMode('USR0', b.OUTPUT);
b.digitalWrite('USR0', b.HIGH);

Build and execute instructions

• The USR0 LED is built in, so no circuit assembly is required.
• Look for it to go high when you run the example code.
• Alter the code to set it low and run it again.

See also

Topics

• BeagleBone expansion headers
• Digital I/O

Related functions

• require
• pinMode

Examples

• Blink an on-board LED
• Blink an external LED