SimpleRpiGpio

Very simple class to Raspberry PI's GPIO port usage

Installation

You can install the library with NPM:

$ npm install git://github.com/jvcalderon/SimpleRpiGpio

Now you only need to require SimpleRpiGpio in your project:

var gpio = require('SimpleRpiGpio');

In Raspberry PI, only root can use GPIO pin. You have to install quick2wire-gpio-admin to use the library without sudo. if you haven't yet installed this library, you can do it as follows:

$ git clone git://github.com/quick2wire/quick2wire-gpio-admin.git
$ cd quick2wire-gpio-admin
$ make && sudo make install
$ sudo adduser $USER gpio

Library methods

Method	Parameters	Description
open	(pinNumber, direction [out\|in])	Open a GPIO pin by using the pin number. This action is needed before read or write
openAll	(direction [out\|in])	Open all GPIO pins with same direction (out or in)
out	(pinNumber, action [0\|1])	Sends signal to Rpi's GPIO pin number
getGpioNumber	(pinNumber)	Get the GPIO number associated to pin number

Usage

First you need to open the pins needed to write (out) or read (in). For example:

gpio.open(7, 'out'); //to open GPIO4 (pin number 7)

Use method openAll if you need open all pins for write or read:

gpio.openAll('out'); //for write

Now, you can send a signal (0 for low voltage - false, 1 for high voltage - true) by out method:

gpio.out(7, 1); //HV - true

If you need more information about Raspberry Pi's GPIO usage, you can read Cómo usar los pines GPIO de la Raspberry PI (in spanish)