diff --git a/example/iot-gateway/node_modules/bytebuffer/externs/bytebuffer.js b/example/iot-gateway/node_modules/bytebuffer/externs/bytebuffer.js
+++ /dev/null
@@ -1,862 +0,0 @@
-/*
- * Copyright 2012 The Closure Compiler Authors.
- *
- * 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.
- */
-
-/**
- * @fileoverview Externs for ByteBuffer.js.
- * @see https://github.com/dcodeIO/ByteBuffer.js
- * @externs
- */
-
-/**
- BEGIN_NODE_INCLUDE
- var ByteBuffer = require('bytebuffer');
- END_NODE_INCLUDE
- */
-
-/**
- * @param {number=} capacity
- * @param {boolean=} littleEndian
- * @param {boolean=} sparse
- * @constructor
- */
-function ByteBuffer(capacity, littleEndian, sparse) {};
-
-/**
- * @type {?ArrayBuffer}
- */
-ByteBuffer.prototype.array;
-
-/**
- * @type {number}
- */
-ByteBuffer.prototype.offset;
-
-/**
- * @type {number}
- */
-ByteBuffer.prototype.markedOffset;
-
-/**
- * @type {number}
- */
-ByteBuffer.prototype.limit;
-
-/**
- * @type {boolean}
- */
-ByteBuffer.prototype.littleEndian;
-
-/**
- * @type {string}
- * @const
- */
-ByteBuffer.VERSION;
-
-/**
- * @type {number}
- * @const
- */
-ByteBuffer.DEFAULT_CAPACITY = 32;
-
-/**
- * @type {boolean}
- * @const
- */
-ByteBuffer.LITTLE_ENDIAN = true;
-
-/**
- * @type {boolean}
- * @const
- */
-ByteBuffer.BIG_ENDIAN = false;
-
-/**
- * @param {number=} capacity
- * @param {boolean=} littleEndian
- * @returns {!ByteBuffer}
- * @nosideeffects
- */
-ByteBuffer.allocate = function(capacity, littleEndian) {};
-
-/**
- * @param {!ArrayBuffer|!Buffer|!{array: ArrayBuffer}|!{buffer: ArrayBuffer}|string} buffer
- * @param {(string|boolean)=} enc
- * @param {boolean=} littleEndian
- * @returns {!ByteBuffer}
- * @throws {Error}
- * @nosideeffects
- */
-ByteBuffer.wrap = function(buffer, enc, littleEndian) {};
-
-/**
- * @param {boolean=} littleEndian
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.LE = function(littleEndian) {};
-
-/**
- * @param {boolean=} bigEndian
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.BE = function(bigEndian) {};
-
-/**
- * @param {string} str
- * @param {boolean} littleEndian
- * @param {boolean} noAssert
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.fromBase64 = function(str, littleEndian, noAssert) {};
-
-/**
- * @param {string} str
- * @param {boolean} littleEndian
- * @param {boolean} noAssert
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.fromBinary = function(str, littleEndian, noAssert) {};
-
-/**
- * @param {string} str
- * @param {boolean} littleEndian
- * @param {boolean} noAssert
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.fromDebug = function(str, littleEndian, noAssert) {};
-
-/**
- * @param {string} str
- * @param {boolean} littleEndian
- * @param {boolean} noAssert
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.fromHex = function(str, littleEndian, noAssert) {};
-
-/**
- * @param {string} str
- * @param {boolean} littleEndian
- * @param {boolean} noAssert
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.fromUTF8 = function(str, littleEndian, noAssert) {};
-
-
-/**
- * @param {number} capacity
- * @returns {boolean}
- */
-ByteBuffer.prototype.resize = function(capacity) {};
-
-/**
- * @param {number} begin
- * @param {number} end
- * @returns {!ByteBuffer}
- * @throws {Error}
- * @nosideeffects
- */
-ByteBuffer.prototype.slice = function(begin, end) {};
-
-/**
- * @param {number} begin
- * @param {number} end
- * @returns {!ByteBuffer}
- * @throws {Error}
- * @nosideeffects
- */
-ByteBuffer.prototype.sliceAndCompact = function(begin, end) {};
-
-/**
- * @param {number} capacity
- * @returns {boolean}
- */
-ByteBuffer.prototype.ensureCapacity = function(capacity) {};
-
-/**
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.flip = function() {};
-
-/**
- * @param {number=} offset
- * @returns {!ByteBuffer}
- * @throws {Error}
- */
-ByteBuffer.prototype.mark = function(offset) {};
-
-/**
- * @returns {!ByteBuffer} this
- */
-ByteBuffer.prototype.reset = function() {};
-
-/**
- * @returns {!ByteBuffer}
- * @nosideeffects
- */
-ByteBuffer.prototype.clone = function() {};
-
-/**
- * @returns {!ByteBuffer}
- * @nosideeffects
- */
-ByteBuffer.prototype.copy = function() {};
-
-/**
- * @returns {number}
- * @nosideeffects
- */
-ByteBuffer.prototype.remaining = function() {};
-
-/**
- * @returns {number}
- * @nosideeffects
- */
-ByteBuffer.prototype.capacity = function() {};
-
-/**
- * @returns {!ByteBuffer}
- * @throws {Error}
- */
-ByteBuffer.prototype.compact = function() {};
-
-/**
- * @returns {!ByteBuffer}
- * @throws {Error}
- */
-ByteBuffer.prototype.reverse = function() {};
-
-/**
- * @param {!ByteBuffer} src
- * @param {number=} offset
- * @returns {!ByteBuffer}
- * @throws {Error}
- */
-ByteBuffer.prototype.append = function(src, offset) {};
-
-/**
- * @param {!ByteBuffer} src
- * @param {number=} offset
- * @returns {!ByteBuffer}
- * @throws {Error}
- */
-ByteBuffer.prototype.prepend = function(src, offset) {};
-
-/**
- * @param {number|string} value
- * @param {number} begin
- * @param {number} end
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.fill = function(value, begin, end) {};
-
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeInt8 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readInt8 = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeByte = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readByte = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeUint8 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readUint8 = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeInt16 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readInt16 = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeShort = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readShort = function (offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeUint16 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readUint16 = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeInt32 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readInt32 = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeInt = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readInt = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeUint32 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readUint32 = function(offset) {};
-
-/**
- * @param {number|Long} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeInt64 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {Long}
- * @throws {Error}
- */
-ByteBuffer.prototype.readInt64 = function(offset) {};
-
-/**
- * @param {number|Long} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeUint64 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {Long}
- * @throws {Error}
- */
-ByteBuffer.prototype.readUint64 = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeFloat32 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readFloat32 = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeFloat = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readFloat = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeFloat64 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readFloat64 = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeDouble = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readDouble = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeLong = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.prototype.readLong = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer|number}
- */
-ByteBuffer.prototype.writeVarint32 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number|!{value: number, length: number}}
- * @throws {Error}
- */
-ByteBuffer.prototype.readVarint32 = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer|number}
- */
-ByteBuffer.prototype.writeZigZagVarint32 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number|{value: number, length: number}}
- * @throws {Error}
- */
-ByteBuffer.prototype.readZigZagVarint32 = function(offset) {};
-
-/**
- * @param {number|Long} value
- * @param {number=} offset
- * @returns {!ByteBuffer|number}
- * @throws {Error}
- */
-ByteBuffer.prototype.writeVarint64 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {!Long|{value: !Long, length: number}}
- * @throws {Error}
- */
-ByteBuffer.prototype.readVarint64 = function(offset) {};
-
-/**
- * @param {number|Long} value
- * @param {number=} offset
- * @returns {!ByteBuffer|number}
- * @throws {Error}
- */
-ByteBuffer.prototype.writeZigZagVarint64 = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {!Long|!{value: !Long, length: number}}
- * @throws {Error}
- */
-ByteBuffer.prototype.readZigZagVarint64 = function(offset) {};
-
-/**
- * @param {number|Long} value
- * @param {number=} offset
- * @returns {!ByteBuffer|number}
- * @throws {Error}
- */
-ByteBuffer.prototype.writeVarint64ZigZag = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {!Long|{value: !Long, length: number}}
- * @throws {Error}
- */
-ByteBuffer.prototype.readVarint64ZigZag = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer|number}
- */
-ByteBuffer.prototype.writeVarint = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number|!{value: number, length: number}}
- * @throws {Error}
- */
-ByteBuffer.prototype.readVarint = function(offset) {};
-
-/**
- * @param {number} value
- * @param {number=} offset
- * @returns {!ByteBuffer|number}
- */
-ByteBuffer.prototype.writeZigZagVarint = function(value, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {number|{value: number, length: number}}
- * @throws {Error}
- */
-ByteBuffer.prototype.readZigZagVarint = function(offset) {};
-
-/**
- * @param {number} value
- * @returns {number}
- * @throws {Error}
- * @nosideeffects
- */
-ByteBuffer.calculateVarint32 = function(value) {};
-
-/**
- * @param {number} value
- * @returns {number}
- * @throws {Error}
- * @nosideeffects
- */
-ByteBuffer.calculateVarint64 = function(value) {};
-
-/**
- * @param {string} str
- * @returns {number}
- * @nosideeffects
- */
-ByteBuffer.calculateUTF8String = function(str) {};
-
-/**
- * @param {string} str
- * @returns {number}
- */
-ByteBuffer.prototype.calculateUTF8Bytes = function(str) {};
-
-/**
- * @param {string} str
- * @param {number=} offset
- * @returns {!ByteBuffer|number}
- */
-ByteBuffer.prototype.writeUTF8String = function(str, offset) {};
-
-/**
- * @param {number} chars
- * @param {number=} offset
- * @returns {string|!{string: string, length: number}}
- * @throws {Error}
- */
-ByteBuffer.prototype.readUTF8String = function(chars, offset) {};
-
-/**
- * @param {number} length
- * @param {number} offset
- * @throws {Error}
- */
-ByteBuffer.prototype.readUTF8StringBytes = function(length, offset) {};
-
-/**
- * @param {string} str
- * @param {number=} offset
- * @returns {!ByteBuffer|number}
- */
-ByteBuffer.prototype.writeLString = function(str, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {string|!{string: string, length: number}}
- * @throws {Error}
- */
-ByteBuffer.prototype.readLString = function(offset) {};
-
-/**
- * @param {string} str
- * @param {number=} offset
- * @returns {!ByteBuffer|number}
- */
-ByteBuffer.prototype.writeVString = function(str, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {string|!{string: string, length: number}}
- * @throws {Error}
- */
-ByteBuffer.prototype.readVString = function(offset) {};
-
-/**
- * @param {string} str
- * @param {number=} offset
- * @returns {!ByteBuffer|number}
- */
-ByteBuffer.prototype.writeCString = function(str, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {string|!{string: string, length: number}}
- * @throws {Error}
- */
-ByteBuffer.prototype.readCString = function(offset) {};
-
-/**
- * @param {number} length
- * @param {number=} offset
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.readBytes = function(length, offset) {};
-
-/**
- * @param {!ByteBuffer} src
- * @param {number=} offset
- * @returns {!ByteBuffer}
- * @throws {Error}
- */
-ByteBuffer.prototype.writeBytes = function(src, offset) {};
-
-/**
- * @param {number=} offset
- * @returns {Array<boolean>}
- */
-ByteBufferPrototype.readBitSet = function(offset) {};
-
-/**
- * @param {Array<boolean>}
- * @param {number=}
- * @returns {!ByteBuffer}
- */
-ByteBuffer.prototype.writeBitSet = function(value, offset) {};
-
-/**
- * @param {number=} wrap
- * @returns {string}
- * @nosideeffects
- */
-ByteBuffer.prototype.toColumns = function(wrap) {};
-
-/**
- * @param {function(string)=} out
- */
-ByteBuffer.prototype.printDebug = function(out) {};
-
-/**
- * @param {boolean=} debug
- * @returns {string}
- * @nosideeffects
- */
-ByteBuffer.prototype.toHex = function(debug) {};
-
-/**
- * @returns {string}
- * @nosideeffects
- */
-ByteBuffer.prototype.toBinary = function() {};
-
-/**
- * @returns {string}
- * @nosideeffects
- */
-ByteBuffer.prototype.toUTF8 = function() {};
-
-/**
- * @returns {string}
- * @nosideeffects
- */
-ByteBuffer.prototype.toBase64 = function() {};
-
-/**
- * @param {string=} enc
- * @returns {string}
- * @nosideeffects
- */
-ByteBuffer.prototype.toString = function(enc) {};
-
-/**
- * @param {boolean=} forceCopy
- * @returns {ArrayBuffer}
- * @nosideeffects
- */
-ByteBuffer.prototype.toArrayBuffer = function(forceCopy) {};
-
-/**
- * @param {!ByteBuffer} src
- * @param {number} offset
- * @returns {!{char: number, length: number}}
- * @nosideeffects
- */
-ByteBuffer.decodeUTF8Char = function(src, offset) {};
-
-/**
- * @param {number} charCode
- * @param {!ByteBuffer} dst
- * @param {number} offset
- * @returns {number}
- * @throws {Error}
- */
-ByteBuffer.encodeUTF8Char = function(charCode, dst, offset) {};
-
-/**
- * @param {number} charCode
- * @returns {number}
- * @throws {Error}
- * @nosideeffects
- */
-ByteBuffer.calculateUTF8Char = function(charCode) {};
-
-/**
- * @param {number} n
- * @returns {number}
- * @nosideeffects
- */
-ByteBuffer.zigZagEncode32 = function(n) {};
-
-/**
- * @param {number} n
- * @returns {number}
- * @nosideeffects
- */
-ByteBuffer.zigZagDecode32 = function(n) {};
-
-/**
- * @param {!ByteBuffer} bb
- * @returns {string}
- * @throws {Error}
- * @nosideeffects
- */
-ByteBuffer.encode64 = function(bb) {};
-
-/**
- * @param {string} str
- * @param {boolean=} littleEndian
- * @returns {!ByteBuffer}
- * @throws {Error}
- * @nosideeffects
- */
-ByteBuffer.decode64 = function(str, littleEndian) {};
-
-/**
- * @param {!ByteBuffer} bb
- * @returns {string}
- * @throws {Error}
- * @nosideeffects
- */
-ByteBuffer.encodeHex = function(bb) {};
-
-/**
- * @param {string} str
- * @param {boolean=} littleEndian
- * @returns {!ByteBuffer}
- * @throws {Error}
- * @nosideeffects
- */
-ByteBuffer.decodeHex = function(str, littleEndian) {};
-
-/**
- * @param {!ByteBuffer} bb
- * @returns {string}
- * @throws {Error}
- * @nosideeffects
- */
-ByteBuffer.encodeBinary = function(bb) {};
-
-/**
- * @param {string} str
- * @param {boolean=} littleEndian
- * @returns {!ByteBuffer}
- * @throws {Error}
- * @nosideeffects
- */
-ByteBuffer.decodeBinary = function(str, littleEndian) {};
-
-/**
- * @type {number}
- * @const
- */
-ByteBuffer.MAX_VARINT32_BYTES = 5;
-
-/**
- * @type {number}
- * @const
- */
-ByteBuffer.MAX_VARINT64_BYTES = 10;