npm install native-gpionode-native-gpio is a sysfs General Purpose Input Output
wrapper for node.js. It gives you the ability to control GPIO devices in a
simple object orientated manner.
Install node-native-gpio with npm(1):
$ npm install node-native-gpio
var gpio = require('native-gpio');
var gpio22 = new gpio.GPIO(22);
gpio22.direction(gpio.OUT)
.value(gpio.HIGH)
.value(gpio.LOW)
.value(gpio.HIGH);
The GPIO function prototype is a C++ add-on which abstracts a GPIO device as
instancable object. There are some class constants defined which should be used
for setting values (see below).
#### GPIO.IN
Direction constant used to determinate that our GPIO device listens for
incoming signals. While a device is set to IN we can only read and not write
to it.
#### GPIO.OUT
Direction constant used to determinate that our GPIO device writes outgoing
signals. While a device is set to OUT we can read and set the current value.
#### GPIO.LOW
Value constant for off state of a GPIO device.
#### GPIO.HIGH
Value constant for on state of a GPIO device.
#### new GPIO(id)
var gpio36 = new GPIO(36);
Creates a new instance of the GPIO class. Internally it will do a GPIO export
if neccessary and open the GPIO's value and direction file descriptor to
reduce syscalls. The C++ deconstructor ensures that the file descriptors are
closed and the GPIO device is getting unexported (this would not have been
possible with plain JavaScript).
#### gpio.direction([value])
if (gpio36.direction() == GPIO.OUT)
gpio36.direction(GPIO.IN);
Returns the current GPIO direction mode if no arguments supplied else it will
check if the first argument is a valid constant and then will set this as
GPIO direction.
#### gpio.value([value])
while (gpio36.value() != GPIO.HIGH)
// wait until GPIO value changes to HIGH
// use GPIO as output device
gpio36.direction(GPIO.OUT).value(GPIO.LOW);
Returns the current GPIO value if no arguments supplied else it will check if
the first argument is a valid constant and then will use this as GPIO value.
Copyright © 2013 Bodo Kaiser
Permission is hereby granted, free of charge, to any person obtaining
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"Software"), to deal in the Software without restriction, including
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