Organized the API

.gitmodules

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+[submodule "lib/node-xml"]
+	path = lib/node-xml
+	url = git@github.com:robrighter/node-xml.git

README.md

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+node-currentcost provides an easy way to pull data from current cost home energy devices. For more information about CurrentCost devices go to:
+http://www.currentcost.com

currentcost.js

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+(function(){
+  events = require('events');  
+  var spawn = require("child_process").spawn;
+  var xml = require('./lib/xml2json');
+  var device = '';
+  var CurrentCost = exports.CurrentCost = function(dev){device = dev};
+  CurrentCost.prototype = new events.EventEmitter();
+  CurrentCost.prototype.begin = function(){
+    var that = this;
+    var dataprocess = spawn("python", ["./python/tailserial.py", device]);
+    dataprocess.stdout.on('data', function (data) {
+      that.emit('data', formatData(xml.parse(new String(data), "", false)));
+    });
+    dataprocess.stderr.on('data', function (data) {
+      that.emit('error', data+"");
+    });  
+  };
+  function formatData(data){
+    if(data.hasOwnProperty('msg')){
+      return data['msg'];
+    }
+  }
+})();

example.js

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+CurrentCost = require('./currentcost').CurrentCost;
+sys = require('sys');
+
+var tryit = new CurrentCost('/dev/tty.usbserial');
+
+tryit.on('data', function(data){
+  console.log(sys.inspect(data));
+});
+
+tryit.on('error', function(data){
+  console.log('ERROR: ' + data);
+});
+
+tryit.begin();

lib/xml2json.js

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+/*
+xml2json v 1.1
+copyright 2005-2007 Thomas Frank
+
+This program is free software under the terms of the 
+GNU General Public License version 2 as published by the Free 
+Software Foundation. It is distributed without any warranty.
+*/
+(function(){
+    var xml2json={
+    	parser:function(xmlcode,ignoretags,debug){
+    		if(!ignoretags){ignoretags=""};
+    		xmlcode=xmlcode.replace(/\s*\/>/g,'/>');
+    		xmlcode=xmlcode.replace(/<\?[^>]*>/g,"").replace(/<\![^>]*>/g,"");
+    		if (!ignoretags.sort){ignoretags=ignoretags.split(",")};
+    		var x=this.no_fast_endings(xmlcode);
+    		x=this.attris_to_tags(x);
+    		x=escape(x);
+    		x=x.split("%3C").join("<").split("%3E").join(">").split("%3D").join("=").split("%22").join("\"");
+    		for (var i=0;i<ignoretags.length;i++){
+    			x=x.replace(new RegExp("<"+ignoretags[i]+">","g"),"*$**"+ignoretags[i]+"**$*");
+    			x=x.replace(new RegExp("</"+ignoretags[i]+">","g"),"*$***"+ignoretags[i]+"**$*")
+    		};
+    		x='<JSONTAGWRAPPER>'+x+'</JSONTAGWRAPPER>';
+    		this.xmlobject={};
+    		var y=this.xml_to_object(x).jsontagwrapper;
+    		if(debug){y=this.show_json_structure(y,debug)};
+    		return y
+    	},
+    	xml_to_object:function(xmlcode){
+    		var x=xmlcode.replace(/<\//g,"§");
+    		x=x.split("<");
+    		var y=[];
+    		var level=0;
+    		var opentags=[];
+    		for (var i=1;i<x.length;i++){
+    			var tagname=x[i].split(">")[0];
+    			opentags.push(tagname);
+    			level++
+    			y.push(level+"<"+x[i].split("§")[0]);
+    			while(x[i].indexOf("§"+opentags[opentags.length-1]+">")>=0){level--;opentags.pop()}
+    		};
+    		var oldniva=-1;
+    		var objname="this.xmlobject";
+    		for (var i=0;i<y.length;i++){
+    			var preeval="";
+    			var niva=y[i].split("<")[0];
+    			var tagnamn=y[i].split("<")[1].split(">")[0];
+    			tagnamn=tagnamn.toLowerCase();
+    			var rest=y[i].split(">")[1];
+    			if(niva<=oldniva){
+    				var tabort=oldniva-niva+1;
+    				for (var j=0;j<tabort;j++){objname=objname.substring(0,objname.lastIndexOf("."))}
+    			};
+    			objname+="."+tagnamn;
+    			var pobject=objname.substring(0,objname.lastIndexOf("."));
+    			if (eval("typeof "+pobject) != "object"){preeval+=pobject+"={value:"+pobject+"};\n"};
+    			var objlast=objname.substring(objname.lastIndexOf(".")+1);
+    			var already=false;
+    			for (k in eval(pobject)){if(k==objlast){already=true}};
+    			var onlywhites=true;
+    			for(var s=0;s<rest.length;s+=3){
+    				if(rest.charAt(s)!="%"){onlywhites=false}
+    			};
+    			if (rest!="" && !onlywhites){
+    				if(rest/1!=rest){
+    					rest="'"+rest.replace(/\'/g,"\\'")+"'";
+    					rest=rest.replace(/\*\$\*\*\*/g,"</");
+    					rest=rest.replace(/\*\$\*\*/g,"<");
+    					rest=rest.replace(/\*\*\$\*/g,">")
+    				}
+    			} 
+    			else {rest="{}"};
+    			if(rest.charAt(0)=="'"){rest='unescape('+rest+')'};
+    			if (already && !eval(objname+".sort")){preeval+=objname+"=["+objname+"];\n"};
+    			var before="=";after="";
+    			if (already){before=".push(";after=")"};
+    			var toeval=preeval+objname+before+rest+after;
+    			eval(toeval);
+    			if(eval(objname+".sort")){objname+="["+eval(objname+".length-1")+"]"};
+    			oldniva=niva
+    		};
+    		return this.xmlobject
+    	},
+    	show_json_structure:function(obj,debug,l){
+    		var x='';
+    		if (obj.sort){x+="[\n"} else {x+="{\n"};
+    		for (var i in obj){
+    			if (!obj.sort){x+=i+":"};
+    			if (typeof obj[i] == "object"){
+    				x+=this.show_json_structure(obj[i],false,1)
+    			}
+    			else {
+    				if(typeof obj[i]=="function"){
+    					var v=obj[i]+"";
+    					//v=v.replace(/\t/g,"");
+    					x+=v
+    				}
+    				else if(typeof obj[i]!="string"){x+=obj[i]+",\n"}
+    				else {x+="'"+obj[i].replace(/\'/g,"\\'").replace(/\n/g,"\\n").replace(/\t/g,"\\t").replace(/\r/g,"\\r")+"',\n"}
+    			}
+    		};
+    		if (obj.sort){x+="],\n"} else {x+="},\n"};
+    		if (!l){
+    			x=x.substring(0,x.lastIndexOf(","));
+    			x=x.replace(new RegExp(",\n}","g"),"\n}");
+    			x=x.replace(new RegExp(",\n]","g"),"\n]");
+    			var y=x.split("\n");x="";
+    			var lvl=0;
+    			for (var i=0;i<y.length;i++){
+    				if(y[i].indexOf("}")>=0 || y[i].indexOf("]")>=0){lvl--};
+    				tabs="";for(var j=0;j<lvl;j++){tabs+="\t"};
+    				x+=tabs+y[i]+"\n";
+    				if(y[i].indexOf("{")>=0 || y[i].indexOf("[")>=0){lvl++}
+    			};
+    			if(debug=="html"){
+    				x=x.replace(/</g,"&lt;").replace(/>/g,"&gt;");
+    				x=x.replace(/\n/g,"<BR>").replace(/\t/g,"&nbsp;&nbsp;&nbsp;&nbsp;")
+    			};
+    			if (debug=="compact"){x=x.replace(/\n/g,"").replace(/\t/g,"")}
+    		};
+    		return x
+    	},
+    	no_fast_endings:function(x){
+    		x=x.split("/>");
+    		for (var i=1;i<x.length;i++){
+    			var t=x[i-1].substring(x[i-1].lastIndexOf("<")+1).split(" ")[0];
+    			x[i]="></"+t+">"+x[i]
+    		}	;
+    		x=x.join("");
+    		return x
+    	},
+    	attris_to_tags: function(x){
+    		var d=' ="\''.split("");
+    		x=x.split(">");
+    		for (var i=0;i<x.length;i++){
+    			var temp=x[i].split("<");
+    			for (var r=0;r<4;r++){temp[0]=temp[0].replace(new RegExp(d[r],"g"),"_jsonconvtemp"+r+"_")};
+    			if(temp[1]){
+    				temp[1]=temp[1].replace(/'/g,'"');
+    				temp[1]=temp[1].split('"');
+    				for (var j=1;j<temp[1].length;j+=2){
+    					for (var r=0;r<4;r++){temp[1][j]=temp[1][j].replace(new RegExp(d[r],"g"),"_jsonconvtemp"+r+"_")}
+    				};
+    				temp[1]=temp[1].join('"')
+    			};
+    			x[i]=temp.join("<")
+    		};
+    		x=x.join(">");
+    		x=x.replace(/ ([^=]*)=([^ |>]*)/g,"><$1>$2</$1");
+    		x=x.replace(/>"/g,">").replace(/"</g,"<");
+    		for (var r=0;r<4;r++){x=x.replace(new RegExp("_jsonconvtemp"+r+"_","g"),d[r])}	;
+    		return x
+    	}
+    };
+
+    exports.parse = function(xmlcode, ignoretags, debug) {
+      return xml2json.parser(xmlcode, ignoretags, debug);
+    }
+})();

python/tailserial.py

@@ -1,4 +1,18 @@
 import serial
-ser = serial.Serial('/dev/tty.usbserial', 57600)
-while 1:
-  print( ser.readline() ),
+import time
+import sys
+
+try:
+  if len(sys.argv) == 2:
+    # ser = serial.Serial(sys.argv[1], 57600)
+    hour=1
+    while 1:
+      hour=hour+1
+      print("<msg><src>CC128-v0.15</src><dsb>00001</dsb><time>"+str(hour)+":06:52</time><tmprF>79.3</tmprF><sensor>0</sensor><id>02143</id><type>1</type><ch1><watts>03275</watts></ch1><ch2><watts>00349</watts></ch2></msg>\n"),
+      #print( ser.readline() ),
+      sys.stdout.flush()
+      time.sleep( 1 )
+  else:
+    sys.stderr.write('No Device Provided')
+except:
+    sys.stderr.write('Invalid CurrentCost Device')