31 lines
940 B
JavaScript
31 lines
940 B
JavaScript
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var dgram = require('dgram');
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var Buffer = require('buffer').Buffer;
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function ArtNetClient(host, port) {
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this._host = host;
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this._port = port;
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this.HEADER = [65, 114, 116, 45, 78, 101, 116, 0, 0, 80, 0, 14]; // 0 - 11
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this.SEQUENCE = [0]; // 12
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this.PHYSICAL = [0]; // 13
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this.UNIVERSE = [0, 0]; // 14 - 15
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//this.LENGTH = [0, 13]; // 16 - 17
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}
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exports.ArtNetClient = ArtNetClient;
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exports.createClient = function(host, port) {
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return new ArtNetClient(host, port);
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}
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ArtNetClient.prototype.send = function(data) {
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// Calcualte the length
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var length_upper = Math.floor(data.length / 256);
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var length_lower = data.length % 256;
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var data = this.HEADER.concat(this.SEQUENCE).concat(this.PHYSICAL).concat(this.UNIVERSE).concat([length_upper, length_lower]).concat(data);
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var buf = Buffer(data);
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var sock = dgram.createSocket("udp4");
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sock.send(buf, 0, buf.length, this._port, this._host, function() {
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sock.close();
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});
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}
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