Use a bitfield sequence to configure LED behaviour for gamepad status.

app/virtual_gamepad_hub.coffee

@@ -5,12 +5,15 @@ Virtual gamepad hub class
 
 gamepad = require './virtual_gamepad'
 log = require '../lib/log'
+config = require '../config'
+
+num_gamepads = config.ledBitFieldSequence.length
 
 class virtual_gamepad_hub
 
   constructor: () ->
     @gamepads = []
-    for i in [0..3]
+    for i in [0..(num_gamepads-1)]
       @gamepads[i] = undefined
 
   connectGamepad: (callback) ->
@@ -19,7 +22,7 @@ class virtual_gamepad_hub
 
     # Check is a slot is available
     # and retrieve the corresponding gamepad id
-    while !freeSlot and padId < 4
+    while !freeSlot and padId < num_gamepads
       if !@gamepads[padId]
         freeSlot = true
       else

config.json

@@ -2,5 +2,6 @@
   "port": 80,
   "useGamepadByDefault": false,
   "analog": true,
-  "logLevel": "info"
+  "logLevel": "info",
+  "ledBitFieldSequence": [1,2,4,8,9,10,12,13,14,15]
 }

public/js/virtual_gamepad_client.js

@@ -414,12 +414,16 @@ function removegamepad(gamepad) {
  ************************/
 var indicatorOn;
 var slotNumber;
+var ledBitField;
 var initSlotIndicator = function () {
     indicatorOn = false;
     var slotAnimationLoop = function () {
-        if (slotNumber != undefined) {
+        if (ledBitField != undefined) {
             $(".indicator").removeClass("indicatorSelected");
-            $("#indicator_"+(slotNumber+1)).addClass("indicatorSelected");
+            if (ledBitField & 0b0001) { $("#indicator_1").addClass("indicatorSelected"); }
+            if (ledBitField & 0b0010) { $("#indicator_2").addClass("indicatorSelected"); }
+            if (ledBitField & 0b0100) { $("#indicator_3").addClass("indicatorSelected"); }
+            if (ledBitField & 0b1000) { $("#indicator_4").addClass("indicatorSelected"); }
         } else {
             if(indicatorOn) {
                 $(".indicator").removeClass("indicatorSelected");
@@ -454,6 +458,8 @@ $( window ).load(function() {
 
     socket.on("gamepadConnected", function(data) {
         slotNumber = data.padId;
+        ledBitField = data.ledBitField;
+        console.log("Here I am, and", data)
 
         $(".btn").off("touchstart touchend");
 

server.coffee

@@ -52,10 +52,11 @@ io.on 'connection', (socket) ->
 
   socket.on 'connectGamepad', () ->
     gp_hub.connectGamepad (gamePadId) ->
+      ledBitField = config.ledBitFieldSequence[gamePadId]
       if gamePadId != -1
         log 'info', 'connectGamepad: success'
         socket.gamePadId = gamePadId
-        socket.emit 'gamepadConnected', {padId: gamePadId}
+        socket.emit 'gamepadConnected', {padId: gamePadId, ledBitField: ledBitField}
       else
         log 'warning', 'connectGamepad: failed'