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node-red-nodes/hardware/digiRGB/78-digiRGB.js

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/**
* Copyright 2013 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
module.exports = function(RED) {
"use strict";
var HID = require('node-hid');
var device;
var node;
function DigiRGBNode(n) {
RED.nodes.createNode(this,n);
node=this;
var devices = HID.devices(0x16c0,0x05df);
for (var i=0; i< devices.length; i++) {
if (devices[i].product == 'DigiUSB') {
path = devices[i].path;
node.log("found: " + path);
try {
device = new HID.HID(devices[i].path);
break;
} catch (e) {
node.log(e)
}
}
}
var p1 = /^\#[A-Fa-f0-9]{6}$/
var p2 = /[0-9]+,[0-9]+,[0-9]+/
if (device) {
this.on("input", function(msg) {
if (msg != null) {
if (p1.test(msg.payload)) {
var r = parseInt(msg.payload.slice(1,3),16);
var g = parseInt(msg.payload.slice(3,5),16);
var b = parseInt(msg.payload.slice(5),16);
device.sendFeatureReport([115,r,g,b]);
} else if (p2.test(msg.payload)) {
var args = msg.payload.split(',');
if (args.length == 3) {
device.sendFeatureReport([115,parseInt(args[0]),parseInt(args[1]),parseInt(args[2])]);
}
} else {
node.warn("incompatable input - " + msg.payload);
}
}
});
} else {
node.warn("no digispark RGB found");
}
this.on('close', function() {
if (device) { device.close(); }
});
}
RED.nodes.registerType("digiRGB",DigiRGBNode);
}