diff --git a/software/utils/ProtocolParser.js b/software/utils/ProtocolParser.js
new file mode 100644
index 0000000..c71c65f
--- /dev/null
+++ b/software/utils/ProtocolParser.js
@@ -0,0 +1,79 @@
+var Writable = require('stream').Writable;
+var util = require('util');
+
+util.inherits(ProtocolParser, Writable);
+
+function ProtocolParser(options){
+	if(options === undefined){
+		options = {};
+	}
+	options.decodeStrings = true;
+	options.objectMode = false;
+	if (!(this instanceof ProtocolParser)){
+    return new ProtocolParser(options);
+  }
+  
+  Writable.call(this, options);
+	this._clearResult();
+  
+}
+
+ProtocolParser.prototype._write = function(chunk, encoding, callback){
+	for(var i=0; i < chunk.length; i++){
+		switch(this._state){
+			case 0://开始数据读取
+				this._result.version = chunk.readUInt8(i) & 0x0f;
+				this._state = 1;
+				break;
+			case 1://读取数据类型
+				this._result.type = chunk.readUInt8(i);
+				this._state = 2;
+				break;
+			case 2://读取大小
+				 this._buf[this._pos++] = chunk[i];
+				 if(this._pos == 2){
+				   this._bytesLeft = this._buf.readUInt16LE(0);
+				   this._state = 3;
+				   this._pos = 0;
+				   this._buf = new Buffer(this._bytesLeft - 1);
+				 }
+				 break;
+			case 3://读取下一个参数
+				if(this._bytesLeft > 0){
+					this._result.data.type = chunk.readUInt8(i);
+					this._bytesLeft--;
+					this._state = 4;
+				}
+				break;
+			case 4://读取剩余的数据
+			  if(this._bytesLeft > 0){
+			    this._buf[this._pos++] = chunk[i];
+			  	this._bytesLeft--;
+			  }
+			  break;
+		}
+		if(this._bytesLeft === 0 && (this._state === 3 || this._state === 4)){
+			this._result.data.param = this._buf;
+			this.emit('packet', this._result);
+			this._clearResult();
+		}
+	}
+	callback(null);
+}
+
+ProtocolParser.prototype._clearResult = function(){
+	this._result = {
+		version: 0,
+		type: null,
+		data: {
+			type: null,
+			param: null,
+		}
+	};
+	this._state = 0;
+	this._buf = new Buffer(6);
+	this._pos = 0;
+	this._bytesLeft = 0;
+}
+
+module.exports = ProtocolParser;
\ No newline at end of file