node-linux-input-device

Native addon to communicate with linux input devices.

Installation

Install with npm:

$ npm install linux-input-device

API

new LinuxInputListener( String devicePath )

Creates a new LinuxInputListener instance.

• path A path to a linux input device

Event: state( Boolean state, Number keyCode, String keyKind )

Fired when a key state changes or when a key is queried.

• state True if the key is pressed, false otherwise
• keyCode Code of the key whose state has changed
• keyKind Category of the key.

String[] LinuxInputListener.KEY_KINDS

Array containing all supported key kinds, like EV_KEY, EV_SW, or EV_LED.

LinuxInputListener.query( String keyKind, Number keyCode )

Query the current key. Also fires the state event.

• keyCode Code of the key whose state to query
• keyKind Category of the key. Must be one of the strings in LinuxInputListener.KEY_KINDS

LinuxInputListener.close([Function callback()])

Closes the current device and invoke callback when the device is closed.

• callback() [optional] A callback function

Examples

var LinuxInputListener = require('linux-input-device');

var SW_LID = 0x00;

var input = new LinuxInputListener('/dev/input/event0');

input.on('state', function(value, key, kind) {
    console.log('State is now:', value, 'for key', key, 'of kind', kind);
});

input.on('error', console.error);

//start by querying for the initial state.
input.on('open' => input.query('EV_SW', SW_LID));