wpi-gpio

A no-frills wrapper around the WiringPi gpio command-line utility.

Installation

$ npm install wpi-gpio

Usage

var gpio = require('wpi-gpio');

Pin numbering

By default, wpi-gpio uses the WiringPi pin numbers. To use Broadcom GPIO (BCM) pin numbers instead (the -g flag to gpio):

gpio.BCM_GPIO = true;

Methods

gpio.input(1).then(function() {
  // GPIO pin 1 set as input pin
});

gpio.output(2, 0).then(function() {
  // GPIO pin 2 set as output pin with value 0 (default value is optional)
});

gpio.input(1).then(function() {
  gpio.pullUp(1).then(function() {
    // set as input with pull-up resistor
    // also available are `gpio.pullDown` and `gpio.triState`
  })
});

gpio.read(3).then(function(val) {
  // `val` is numeric value of GPIO pin 3
});

gpio.write(4, 1).then(function() {
  // GPIO pin 4 value set to 1
});

gpio.sequence(5, [0, 1, 0, 1]).then(function() {
  // GPIO pin 5 has values written in series, with a 100ms delay between values
});

gpio.tap(6).then(function() {
  // GPIO pin 6 is "tapped" once. Same as `gpio.sequence(6, [1, 0, 1])`
});

License

This software is released under the terms of the MIT license. See LICENSE.