diff --git a/platforms/isy-js.js b/platforms/isy-js.js
index 37d515b..f28c0c0 100644
--- a/platforms/isy-js.js
+++ b/platforms/isy-js.js
@@ -1,9 +1,61 @@
+/*
+ ISY-JS
+ 
+ ISY-99 REST / WebSockets based HomeBridge shim. 
+ 
+ Supports the following Insteon devices: Lights (dimmable and non-dimmable), Fans, Outlets, Door/Window Sensors, MorningLinc locks, Inline Lincs and I/O Lincs.
+ Also supports ZWave based locks. If elkEnabled is set to true then this will also expose your Elk Alarm Panel and all of your Elk Sensors. 
+ 
+ Turns out that HomeBridge platforms can only return a maximum of 100 devices. So if you end up exposing more then 100 devices through HomeBridge the HomeKit
+ software will fail adding the HomeBridge to your HomeKit network. To address this issue this platform provides an option to screen out devices based on 
+ criteria specified in the config. 
+
+ Configuration sample:
+ 
+     "platforms": [
+        {
+            "platform": "isy-js",
+            "name": "isy-js",         
+            "host": "10.0.1.12",      
+            "username": "admin",      
+            "password": "password",   
+            "elkEnabled": true,       
+            "ignoreDevices": [        
+                { "nameContains": "ApplianceLinc", "lastAddressDigit": "", "address": ""},
+                { "nameContains": "Bedroom.Side Gate", "lastAddressDigit": "", "address": ""},
+                { "nameContains": "Remote", "lastAddressDigit": "", "address": "" },    
+                { "nameContains": "Keypad", "lastAddressDigit": "2", "address": "" },
+            ]
+        }
+     ]
+
+ Fields: 
+ "platform" - Must be set to isy-js
+ "name" - Can be set to whatever you want
+ "host" - IP address of the ISY
+ "username" - Your ISY username
+ "password" - Your ISY password
+ "elkEnabled" - true if there is an elk alarm panel connected to your ISY
+ "ignoreDevices" - Array of objects specifying criteria for screening out devices from the network. nameContains is the only required criteria. If the other criteria
+                   are blank all devices will match those criteria (providing they match the name criteria).
+		"nameContains" - Specifies a substring to check against the names of the ISY devices. Required field for the criteria.
+		"lastAddressDigit" - Specifies a single digit in the ISY address of a device which should be used to match the device. Example use of this is for composite 
+		                     devices like keypads so you can screen out the non-main buttons. 
+	    "address" - ISY address to match.		   
+         
+		Examples:
+		
+		{ "nameContains": "Keypad", "lastAddressDigit": "2", "address": "" } - Ignore all devices which have the word Keypad in their name and whose last address digit is 2.
+		{ "nameContains": "Remote", "lastAddressDigit": "", "address": "" } - Ignore all devices which have the word Remote in their name
+		{ "nameContains": "", "lastAddressDigit": "", "address": "15 5 3 2"} - Ignore the device with an ISY address of 15 5 3 2.
+*/
 var types = require("HAP-NodeJS/accessories/types.js");
 var isy = require('isy-js');
 var Service = require("HAP-NodeJS").Service;
 var Characteristic = require("HAP-NodeJS").Characteristic;
 var inherits = require('util').inherits;
 
+// Global device map. Needed to map incoming notifications to the corresponding HomeKit device for update.
 var deviceMap = {};
 
 function ISYChangeHandler(isy,device) {