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blinkstick.js
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/**
* Provides access to BlinkStick devices
*
* @module blinkstick
*/
var usb = require('node-hid');
var VENDOR_ID = 0x20a0,
PRODUCT_ID = 0x41e5,
COLOR_KEYWORDS = {
"aqua": "#00ffff",
"aliceblue": "#f0f8ff",
"antiquewhite": "#faebd7",
"black": "#000000",
"blue": "#0000ff",
"cyan": "#00ffff",
"darkblue": "#00008b",
"darkcyan": "#008b8b",
"darkgreen": "#006400",
"darkturquoise": "#00ced1",
"deepskyblue": "#00bfff",
"green": "#008000",
"lime": "#00ff00",
"mediumblue": "#0000cd",
"mediumspringgreen": "#00fa9a",
"navy": "#000080",
"springgreen": "#00ff7f",
"teal": "#008080",
"midnightblue": "#191970",
"dodgerblue": "#1e90ff",
"lightseagreen": "#20b2aa",
"forestgreen": "#228b22",
"seagreen": "#2e8b57",
"darkslategray": "#2f4f4f",
"darkslategrey": "#2f4f4f",
"limegreen": "#32cd32",
"mediumseagreen": "#3cb371",
"turquoise": "#40e0d0",
"royalblue": "#4169e1",
"steelblue": "#4682b4",
"darkslateblue": "#483d8b",
"mediumturquoise": "#48d1cc",
"indigo": "#4b0082",
"darkolivegreen": "#556b2f",
"cadetblue": "#5f9ea0",
"cornflowerblue": "#6495ed",
"mediumaquamarine": "#66cdaa",
"dimgray": "#696969",
"dimgrey": "#696969",
"slateblue": "#6a5acd",
"olivedrab": "#6b8e23",
"slategray": "#708090",
"slategrey": "#708090",
"lightslategray": "#778899",
"lightslategrey": "#778899",
"mediumslateblue": "#7b68ee",
"lawngreen": "#7cfc00",
"aquamarine": "#7fffd4",
"chartreuse": "#7fff00",
"gray": "#808080",
"grey": "#808080",
"maroon": "#800000",
"olive": "#808000",
"purple": "#800080",
"lightskyblue": "#87cefa",
"skyblue": "#87ceeb",
"blueviolet": "#8a2be2",
"darkmagenta": "#8b008b",
"darkred": "#8b0000",
"saddlebrown": "#8b4513",
"darkseagreen": "#8fbc8f",
"lightgreen": "#90ee90",
"mediumpurple": "#9370db",
"darkviolet": "#9400d3",
"palegreen": "#98fb98",
"darkorchid": "#9932cc",
"yellowgreen": "#9acd32",
"sienna": "#a0522d",
"brown": "#a52a2a",
"darkgray": "#a9a9a9",
"darkgrey": "#a9a9a9",
"greenyellow": "#adff2f",
"lightblue": "#add8e6",
"paleturquoise": "#afeeee",
"lightsteelblue": "#b0c4de",
"powderblue": "#b0e0e6",
"firebrick": "#b22222",
"darkgoldenrod": "#b8860b",
"mediumorchid": "#ba55d3",
"rosybrown": "#bc8f8f",
"darkkhaki": "#bdb76b",
"silver": "#c0c0c0",
"mediumvioletred": "#c71585",
"indianred": "#cd5c5c",
"peru": "#cd853f",
"chocolate": "#d2691e",
"tan": "#d2b48c",
"lightgray": "#d3d3d3",
"lightgrey": "#d3d3d3",
"thistle": "#d8bfd8",
"goldenrod": "#daa520",
"orchid": "#da70d6",
"palevioletred": "#db7093",
"crimson": "#dc143c",
"gainsboro": "#dcdcdc",
"plum": "#dda0dd",
"burlywood": "#deb887",
"lightcyan": "#e0ffff",
"lavender": "#e6e6fa",
"darksalmon": "#e9967a",
"palegoldenrod": "#eee8aa",
"violet": "#ee82ee",
"azure": "#f0ffff",
"honeydew": "#f0fff0",
"khaki": "#f0e68c",
"lightcoral": "#f08080",
"sandybrown": "#f4a460",
"beige": "#f5f5dc",
"mintcream": "#f5fffa",
"wheat": "#f5deb3",
"whitesmoke": "#f5f5f5",
"ghostwhite": "#f8f8ff",
"lightgoldenrodyellow": "#fafad2",
"linen": "#faf0e6",
"salmon": "#fa8072",
"oldlace": "#fdf5e6",
"bisque": "#ffe4c4",
"blanchedalmond": "#ffebcd",
"coral": "#ff7f50",
"cornsilk": "#fff8dc",
"darkorange": "#ff8c00",
"deeppink": "#ff1493",
"floralwhite": "#fffaf0",
"fuchsia": "#ff00ff",
"gold": "#ffd700",
"hotpink": "#ff69b4",
"ivory": "#fffff0",
"lavenderblush": "#fff0f5",
"lemonchiffon": "#fffacd",
"lightpink": "#ffb6c1",
"lightsalmon": "#ffa07a",
"lightyellow": "#ffffe0",
"magenta": "#ff00ff",
"mistyrose": "#ffe4e1",
"moccasin": "#ffe4b5",
"navajowhite": "#ffdead",
"orange": "#ffa500",
"orangered": "#ff4500",
"papayawhip": "#ffefd5",
"peachpuff": "#ffdab9",
"pink": "#ffc0cb",
"red": "#ff0000",
"seashell": "#fff5ee",
"snow": "#fffafa",
"tomato": "#ff6347",
"white": "#ffffff",
"yellow": "#ffff00",
"warmwhite": "fdf5e6" // Non-standard. Added to support CheerLights.
};
/**
* Initialize new BlinkStick device
*
* @class BlinkStick
* @constructor
* @param {Object} device The USB device as returned from "usb" package.
* @param {String} [serialNumber] Serial number of the device. Used only in Windows.
* @param {String} [manufacturer] Manufacturer of the device. Used only in Windows.
* @param {String} [product] Product name of the device. Used only in Windows.
*/
function BlinkStick (device, serialNumber, manufacturer, product) {
if (device) {
this.device = new usb.HID(device);
this.serial = serialNumber;
this.manufacturer = manufacturer;
this.product = product;
}
this.inverse = false;
this.animationsEnabled = true;
var self = this;
this.getSerial(function (err, result) {
if (typeof(err) === 'undefined')
{
self.requiresSoftwareColorPatch = self.getVersionMajor() == 1 &&
self.getVersionMinor() >= 1 && self.getVersionMinor() <= 3;
}
});
}
/**
* Returns the serial number of device.
*
* <pre>
* BSnnnnnn-1.0
* || | | |- Software minor version
* || | |--- Software major version
* || |-------- Denotes sequential number
* ||----------- Denotes BlinkStick device
* </pre>
*
* Software version defines the capabilities of the device
*
* Usage:
*
* @example
* getSerial(function(err, serial) {
* console.log(serial);
* });
*
* @method getSerial
* @param {function} callback Callback to receive serial number
*/
BlinkStick.prototype.getSerial = function (callback) {
if (callback) callback(undefined, this.serial);
};
/**
* Close BlinkStick device and stop all animations
*
* @method close
*/
BlinkStick.prototype.close = function (callback) {
this.stop();
try {
this.device.close();
} catch (ex) {
if (callback) callback(ex);
return;
}
if (callback) callback();
};
/**
* Stop all animations
*
* @method stop
*/
BlinkStick.prototype.stop = function () {
this.animationsEnabled = false;
};
/**
* Get the major version from serial number
*
* @method getVersionMajor
* @return {Number} Major version number from serial
*/
BlinkStick.prototype.getVersionMajor = function () {
return parseInt(this.serial.substring(this.serial.length - 3, this.serial.length - 2));
};
/**
* Get the minor version from serial number
*
* @method getVersionMinor
* @return {Number} Minor version number from serial
*/
BlinkStick.prototype.getVersionMinor = function () {
return parseInt(this.serial.substring(this.serial.length - 1, this.serial.length));
};
/**
* Get the manufacturer of the device
*
* Usage:
*
* @example
* getManufacturer(function(err, data) {
* console.log(data);
* });
*
* @method getManufacturer
* @param {function} callback Callback to receive manufacturer name
*/
BlinkStick.prototype.getManufacturer = function (callback) {
if (callback) callback(undefined, this.manufacturer);
};
/**
* Get the description of the device
*
* Usage:
*
* @example
* getDescription(function(err, data) {
* console.log(data);
* });
*
* @method getDescription
* @param {function} callback Callback to receive description
*/
BlinkStick.prototype.getDescription = function (callback) {
if (callback) callback(undefined, this.product);
};
/**
* Determines report ID and number of LEDs for the report
*
* @private
* @method _determineReportId
* @return {object} data.reportId and data.ledCount
*/
function _determineReportId(ledCount)
{
var reportId = 9;
var maxLeds = 64;
if (ledCount < 8 * 3) {
reportId = 6;
maxLeds = 8;
} else if (ledCount < 16 * 3) {
reportId = 7;
maxLeds = 16;
} else if (ledCount < 32 * 3) {
reportId = 8;
maxLeds = 32;
}
return { 'reportId': reportId, 'maxLeds': maxLeds };
}
/**
* Set the color of LEDs
*
* @example
* //Available overloads
* setColor(red, green, blue, [options], [callback]); // use [0..255] ranges for intensity
*
* setColor(color, [options], [callback]); // use '#rrggbb' format
*
* setColor(color_name, [options], [callback]); // use 'random', 'red', 'green', 'yellow' and other CSS supported names
*
* @method setColor
* @param {Number|String} red Red color intensity 0 is off, 255 is full red intensity OR string CSS color keyword OR hex color, eg "#BADA55".
* @param {Number} [green] Green color intensity 0 is off, 255 is full green intensity.
* @param {Number} [blue] Blue color intensity 0 is off, 255 is full blue intensity.
* @param {Object} [options] additional options {"channel": 0, "index": 0}. Channel is represented as 0=R, 1=G, 2=B
* @param {Function} [callback] Callback, called when complete.
*/
BlinkStick.prototype.setColor = function (red, green, blue, options, callback) {
var params = this.interpretParameters(red, green, blue, options, callback);
if (typeof(params) === 'undefined')
{
return;
}
var self = this;
var sendColorInternal = function (r, g, b, callback) {
try {
if (params.options.channel === 0 && params.options.index === 0) {
self.setFeatureReport(1, [1, r, g, b], callback);
} else {
self.setFeatureReport(5, [5, params.options.channel, params.options.index, r, g, b], callback);
}
} catch (ex) {
if (callback) callback(ex);
}
};
if (this.requiresSoftwareColorPatch) {
this.getColor(function (err, cr, cg, cb) {
if (typeof(err) !== 'undefined') {
if (params.callback) params.callback(err);
return;
}
if (params.red == cg && params.green == cr && params.blue == cb) {
if (cr > 0) {
cr = cr - 1;
} else if (cg > 0) {
cg = cg - 1;
}
sendColorInternal(cr, cg, cb, function (err) {
if (typeof(err) !== 'undefined') {
if (params.callback) params.callback(err);
return;
}
sendColorInternal(params.red, params.green, params.blue, function (err) {
if (typeof(err) !== 'undefined') {
if (params.callback) params.callback(err);
return;
} else {
if (params.callback) params.callback();
}
});
});
} else {
sendColorInternal(params.red, params.green, params.blue, function (err) {
if (typeof(err) !== 'undefined') {
if (params.callback) params.callback(err);
return;
} else {
if (params.callback) params.callback();
}
});
}
});
} else {
sendColorInternal(params.red, params.green, params.blue, params.callback);
}
};
/**
* Set inverse mode for IKEA DIODER in conjunction with BlinkStick v1.0
*
* @method setInverse
* @param {Boolean} inverse Set true for inverse mode and false otherwise
*/
BlinkStick.prototype.setInverse = function (inverse) {
this.inverse = inverse;
};
/**
* Get inverse mode setting for IKEA DIODER in conjunction with BlinkStick v1.0
*
* @method getInverse
* @return {Boolean} true for enabled inverse mode and false otherwise
*/
BlinkStick.prototype.getInverse = function (inverse) {
return this.inverse;
};
/**
* Set mode for BlinkStick Pro
*
* - 0 = Normal
* - 1 = Inverse
* - 2 = WS2812
*
* You can read more about BlinkStick modes by following this link:
*
* http://www.blinkstick.com/help/tutorials/blinkstick-pro-modes
*
* @method setMode
* @param {Number} mode Set the desired mode for BlinkStick Pro
*/
BlinkStick.prototype.setMode = function (mode, callback) {
this.setFeatureReport(0x0004, [4, mode], callback);
};
/**
* Get mode for BlinkStick Pro
*
* - 0 = Normal
* - 1 = Inverse
* - 2 = WS2812
*
* You can read more about BlinkStick modes by following this link:
*
* http://www.blinkstick.com/help/tutorials/blinkstick-pro-modes
*
* Usage:
*
* @example
* getMode(function(err, data) {
* console.log(data);
* });
*
* @method getMode
* @param {callback} callback receive mode with callback
*/
BlinkStick.prototype.getMode = function (callback) {
try
{
this.getFeatureReport(4, 33, function (err, buffer) {
if (callback) callback(err, buffer[1]);
});
}
catch (err)
{
if (callback) callback(err, 0);
}
};
/**
* Get the current color visible on BlinkStick
*
* Function supports the following overloads:
*
* @example
* //Available overloads
* getColor(callback); //index defaults to 0
*
* getColor(index, callback);
*
* @example
* getColor(0, function(err, r, g, b) {
* console.log(r, g, b);
* });
*
* @method getColor
* @param {Number=0} index The index of the LED
* @param {Function} callback Callback to which to pass the color values.
* @return {Number, Number, Number} Callback returns three numbers: R, G and B [0..255].
*/
BlinkStick.prototype.getColor = function (index, callback) {
if (typeof(index) == 'function') {
callback = index;
index = 0;
}
if (index === 0) {
this.getFeatureReport(0x0001, 33, function (err, buffer) {
if (callback) {
if (typeof(err) === 'undefined') {
if (buffer) {
callback(err, buffer[1], buffer[2], buffer[3]);
} else {
callback(err, 0, 0, 0);
}
} else {
callback(err);
}
}
});
} else {
this.getColors(index, function(err, buffer) {
if (callback) {
if (typeof(err) === 'undefined') {
callback(err, buffer[index * 3 + 1], buffer[index * 3], buffer[index * 3 + 2]);
} else {
callback(err);
}
}
});
}
};
/**
* Get the current color frame on BlinkStick Pro
*
* Usage:
*
* @example
* getColors(8, function(err, data) {
* console.log(data);
* });
*
* @method getColors
* @param {Number} count How many LEDs should return
* @param {Function} callback Callback to which to pass the color values.
* @return {Array} Callback returns an array of LED data in the following format: [g0, r0, b0, g1, r1, b1...]
*/
BlinkStick.prototype.getColors = function (count, callback) {
params = _determineReportId(count * 3);
this.getFeatureReport(params.reportId, params.maxLeds * 3 + 2, function (err, buffer) {
if (callback) {
if (typeof(buffer) !== 'undefined') {
buffer = buffer.slice(2, buffer.length -1);
}
callback(err, buffer);
}
});
};
/**
* Set the color frame on BlinkStick Pro
*
* @example
* var data = [255, 0, 0, 0, 255, 0];
*
* setColors(0, data, function(err) {
* });
*
* @method setColors
* @param {Number} channel Channel is represented as 0=R, 1=G, 2=B
* @param {Array} data LED data in the following format: [g0, r0, b0, g1, r1, b1...]
* @param {Function} callback Callback when the operation completes
*/
BlinkStick.prototype.setColors = function (channel, data, callback) {
params = _determineReportId(data.length);
var i = 0;
report = [params.reportId, channel];
data.forEach(function(item) {
if (i < params.maxLeds * 3) {
report.push(item);
i += 1;
}
});
for (var j = i; j < params.maxLeds * 3; j++) {
report.push(0);
}
this.setFeatureReport(params.reportId, report, callback);
};
/**
* Converts decimal number to hex with zero padding
*
* @private
* @method decimalToHex
* @param {Number} d Decimal number to convert
* @param {Number} padding How many zeros to use for padding
* @return {String} Decimal number converted to hex string
*/
function decimalToHex(d, padding) {
var hex = Number(d).toString(16);
padding = typeof (padding) === "undefined" || padding === null ? padding = 2 : padding;
while (hex.length < padding) {
hex = "0" + hex;
}
return hex;
}
/**
* Get the current color as hex string.
*
* Function supports the following overloads:
*
* @example
* //Available overloads
* getColorString(callback); //index defaults to 0
*
* getColorString(index, callback);
*
* @example
* getColorString(0, function(err, color) {
* console.log(color);
* });
*
* getColorString(function(err, color) {
* console.log(color);
* });
*
* @method getColorString
* @param {Number} index The index of the LED to retrieve data
* @param {Function} callback Callback to which to pass the color string.
* @return {String} Hex string, eg "#BADA55".
*/
BlinkStick.prototype.getColorString = function (index, callback) {
if (typeof(index) == 'function') {
callback = index;
index = 0;
}
this.getColor(index, function (err, r, g, b) {
if (callback) {
if (typeof(err) === 'undefined') {
callback(err, '#' + decimalToHex(r, 2) + decimalToHex(g, 2) + decimalToHex(b, 2) );
} else {
callback(err);
}
}
});
};
/**
* Get an infoblock from a device.
*
* @private
* @static
* @method getInfoBlock
* @param {BlinkStick} device Device from which to get the value.
* @param {Number} location Address to seek the data.
* @param {Function} callback Callback to which to pass the value.
*/
function getInfoBlock (device, location, callback) {
getFeatureReport(location, 33, function (err, buffer) {
if (typeof(err) !== 'undefined')
{
callback(err);
return;
}
var result = '',
i, l;
for (i = 1, l = buffer.length; i < l; i++) {
if (i === 0) break;
result += String.fromCharCode(buffer[i]);
}
callback(err, result);
});
}
/**
* Get default value from options
*
* @private
* @static
* @method opt
* @param {Object} options Option object to operate on
* @param {String} name The name of the parameter
* @param {Object} defaultValue Default value if name is not found in option object
*/
function opt(options, name, defaultValue){
return options && options[name]!==undefined ? options[name] : defaultValue;
}
/**
* Sets an infoblock on a device.
*
* @private
* @static
* @method setInfoBlock
* @param {BlinkStick} device Device on which to set the value.
* @param {Number} location Address to seek the data.
* @param {String} data The value to push to the device. Should be <= 32 chars.
* @param {Function} callback Callback to which to pass the value.
*/
function setInfoBlock (device, location, data, callback) {
var i,
l = Math.min(data.length, 33),
buffer = new Buffer(33);
buffer[0] = 0;
for (i = 0; i < l; i++) buffer[i + 1] = data.charCodeAt(i);
for (i = l; i < 33; i++) buffer[i + 1] = 0;
setFeatureReport(location, buffer, callback);
}
/**
* Get the infoblock1 of the device.
* This is a 32 byte array that can contain any data. It's supposed to
* hold the "Name" of the device making it easier to identify rather than
* a serial number.
*
* Usage:
*
* @example
* getInfoBlock1(function(err, data) {
* console.log(data);
* });
*
* @method getInfoBlock1
* @param {Function} callback Callback to which to pass the value.
*/
BlinkStick.prototype.getInfoBlock1 = function (callback) {
getInfoBlock(this.device, 0x0002, callback);
};
/**
* Get the infoblock2 of the device.
* This is a 32 byte array that can contain any data.
*
* Usage:
*
* @example
* getInfoBlock2(function(err, data) {
* console.log(data);
* });
*
* @method getInfoBlock2
* @param {Function} callback Callback to which to pass the value.
*/
BlinkStick.prototype.getInfoBlock2 = function (callback) {
getInfoBlock(this.device, 0x0003, callback);
};
/**
* Sets the infoblock1 with specified string.
* It fills the rest of bytes with zeros.
*
* Usage:
*
* @example
* setInfoBlock1("abcdefg", function(err) {
* });
*
* @method setInfoBlock1
* @param {String} data Data value for InfoBlock
* @param {Function} callback Callback when the operation completes
*/
BlinkStick.prototype.setInfoBlock1 = function (data, callback) {
setInfoBlock(this.device, 0x0002, data, callback);
};
/**
* Sets the infoblock2 with specified string.
* It fills the rest of bytes with zeros.
*
* Usage:
*
* @example
* setInfoBlock2("abcdefg", function(err) {
* });
*
* @method setInfoBlock2
* @param {String} data Data value for InfoBlock
* @param {Function} callback Callback when the operation completes
*/
BlinkStick.prototype.setInfoBlock2 = function (data, callback) {
setInfoBlock(this.device, 0x0003, data, callback);
};
/**
* Sets the LED to a random color.
*
* @method setRandomColor
*/
BlinkStick.prototype.setRandomColor = function () {
var args = [],
i;
for (i = 0; i < 3; i++) args.push(Math.floor(Math.random() * 256));
this.setColor.apply(this, args);
};
/**
* Turns the LED off.
*
* @method turnOff
*/
BlinkStick.prototype.turnOff = function () {
this.setColor();
};
/**
* Generate random integer number within a range.
*
* @private
* @static
* @method randomIntInc
* @param {Number} low the low value of the number
* @param {Number} high the high value of the number
* @return {Number} Random number in the range of [low..high] inclusive of low and high
*/
function randomIntInc (low, high) {
return Math.floor(Math.random() * (high - low + 1) + low);
}
/**
* Automatically interpret parameters supplied for functions to generate
* overrides.
*
* @private
* @method interpretParameters
* @param {Number|String} red Red color intensity 0 is off, 255 is full red intensity OR string CSS color keyword OR hex color, eg "#BADA55".
* @param {Number} [green] Green color intensity 0 is off, 255 is full green intensity.
* @param {Number} [blue] Blue color intensity 0 is off, 255 is full blue intensity.
* @param {Object} [options] additional options
* @param {Function} [callback] Callback, called when complete.
* @return {Object} Conains sanitized RGB value, options and callback if they have been assigned
*/
BlinkStick.prototype.interpretParameters = function (red, green, blue, options, callback) {
var hex;
if (typeof red == 'string') {
if (typeof green == 'object') {
options = green;
callback = blue;
} else {
callback = green;
}
if (red == 'random') {
red = randomIntInc(0, 255);
green = randomIntInc(0, 255);
blue = randomIntInc(0, 255);
} else if (red.match(/^\#[A-Za-z0-9]{6}$/)) {
hex = red;
} else if (!(hex = COLOR_KEYWORDS[red])) {
if (callback)
callback(new ReferenceError('Invalid CSS color keyword'));
return;
}
} else if (typeof(options) == 'function') {
callback = options;
}
if (hex) {
red = parseInt(hex.substr(1, 2), 16);
green = parseInt(hex.substr(3, 2), 16);
blue = parseInt(hex.substr(5, 2), 16);
} else {
red = red || 0;
green = green || 0;
blue = blue || 0;
}
if (options === undefined) {
options = {};
}
options.channel = opt(options, 'channel', 0);
options.index = opt(options, 'index', 0);
red = Math.max(Math.min(red, 255), 0);
green = Math.max(Math.min(green, 255), 0);
blue = Math.max(Math.min(blue, 255), 0);
if (this.inverse)
{
red = 255 - red;
green = 255 - green;
blue = 255 - blue;
}
return {'red': red, 'green': green, 'blue': blue, 'options': options, 'callback': callback};
};