diff --git a/src/PepperDash.Essentials.Core/Devices/DeviceManager.cs b/src/PepperDash.Essentials.Core/Devices/DeviceManager.cs
index 0552faeba..ae8eba033 100644
--- a/src/PepperDash.Essentials.Core/Devices/DeviceManager.cs
+++ b/src/PepperDash.Essentials.Core/Devices/DeviceManager.cs
@@ -14,6 +14,7 @@ public static class DeviceManager
     {
         public static event EventHandler<EventArgs> AllDevicesActivated;
         public static event EventHandler<EventArgs> AllDevicesRegistered;
+        public static event EventHandler<EventArgs> AllDevicesInitialized;
 
         private static readonly CCriticalSection DeviceCriticalSection = new CCriticalSection();
         private static readonly CEvent AllowAddDevicesCEvent = new CEvent(false, true);
@@ -67,7 +68,7 @@ public static void ActivateAll()
                 foreach (var d in Devices.Values)
                 {
                     try
-                    {
+                    { 
                         if (d is Device)
                             (d as Device).PreActivate();
                     }
@@ -123,6 +124,18 @@ public static void ActivateAll()
             }
         }
 
+        private static void DeviceManager_Initialized(object sender, EventArgs e)
+        {
+            var allInitialized = Devices.Values.OfType<EssentialsDevice>().All(d => d.IsInitialized);
+
+            if (allInitialized)
+            {
+                Debug.LogMessage(LogEventLevel.Information, "****All Devices Initalized****");
+
+                OnAllDevicesInitialized();
+            }
+        }
+
         private static void OnAllDevicesActivated()
         {
             var handler = AllDevicesActivated;
@@ -141,6 +154,15 @@ private static void OnAllDevicesRegistered()
             }
         }
 
+        private static void OnAllDevicesInitialized()
+        {
+            var handler = AllDevicesInitialized;
+            if (handler != null)
+            {
+                handler(null, new EventArgs());
+            }
+        }
+
         /// <summary>
         /// Calls activate on all Device class items
         /// </summary>
@@ -264,6 +286,9 @@ public static void AddDevice(IKeyed newDev)
                 Devices.Add(newDev.Key, newDev);
                 //if (!(_Devices.Contains(newDev)))
                 //    _Devices.Add(newDev);
+
+                if (newDev is EssentialsDevice essentialsDev)
+                    essentialsDev.Initialized += DeviceManager_Initialized;
             }
             finally
             {
diff --git a/src/PepperDash.Essentials.Core/Devices/EssentialsDevice.cs b/src/PepperDash.Essentials.Core/Devices/EssentialsDevice.cs
index 8b0fc9fe7..bdb8b45ad 100644
--- a/src/PepperDash.Essentials.Core/Devices/EssentialsDevice.cs
+++ b/src/PepperDash.Essentials.Core/Devices/EssentialsDevice.cs
@@ -17,6 +17,24 @@ namespace PepperDash.Essentials.Core
     [Description("The base Essentials Device Class")]
     public abstract class EssentialsDevice : Device
     {
+        public event EventHandler Initialized;
+
+        private bool _isInitialized;
+        public bool IsInitialized { 
+            get { return _isInitialized; }
+            private set 
+            { 
+                if (_isInitialized == value) return;
+                
+                _isInitialized = value;
+
+                if (_isInitialized)
+                {
+                    Initialized?.Invoke(this, new EventArgs());
+                }
+            } 
+        }
+
         protected EssentialsDevice(string key)
             : base(key)
         {
@@ -41,6 +59,8 @@ private void DeviceManagerOnAllDevicesActivated(object sender, EventArgs eventAr
                 try
                 {
                     Initialize();
+
+                    IsInitialized = true;
                 }
                 catch (Exception ex)
                 {
diff --git a/src/PepperDash.Essentials.Core/Room/Combining/EssentialsRoomCombiner.cs b/src/PepperDash.Essentials.Core/Room/Combining/EssentialsRoomCombiner.cs
index 110868219..f0fb5e988 100644
--- a/src/PepperDash.Essentials.Core/Room/Combining/EssentialsRoomCombiner.cs
+++ b/src/PepperDash.Essentials.Core/Room/Combining/EssentialsRoomCombiner.cs
@@ -84,7 +84,15 @@ public EssentialsRoomCombiner(string key, EssentialsRoomCombinerPropertiesConfig
                 SetupPartitionStateProviders();
 
                 SetRooms();
+            });
+
 
+            // Subscribe to the AllDevicesInitialized event
+            // We need to wait until all devices are initialized in case
+            // any actions are dependent on 3rd party devices already being
+            // connected and initialized
+            DeviceManager.AllDevicesInitialized += (o, a) =>
+            {
                 if (IsInAutoMode)
                 {
                     DetermineRoomCombinationScenario();
@@ -93,7 +101,7 @@ public EssentialsRoomCombiner(string key, EssentialsRoomCombinerPropertiesConfig
                 {
                     SetRoomCombinationScenario(_propertiesConfig.defaultScenarioKey);
                 }
-            });
+            };
         }
 
         private void CreateScenarios()