fix: set ApiVersion to private set

src/PepperDash.Essentials.Core/UDMApi/CustomProperties.cs

@@ -0,0 +1,15 @@
+using Newtonsoft.Json;
+
+namespace PepperDash.Essentials.Core
+{
+
+    internal class CustomProperties
+    {
+        [JsonProperty("label")]
+        public string Label { get; set; }
+
+        [JsonProperty("value")]
+        public string Value { get; set; }
+    }
+
+}

src/PepperDash.Essentials.Core/UDMApi/DeviceStatus.cs

@@ -0,0 +1,29 @@
+using Newtonsoft.Json;
+
+namespace PepperDash.Essentials.Core
+{
+    internal class DeviceStatus
+    {
+        [JsonProperty("label")]
+        public string Label { get; set; }
+
+        [JsonProperty("status")]
+        public string Status { get; set; }
+
+        [JsonProperty("description")]
+        public string Description { get; set; }
+
+        [JsonProperty("videoSource")]
+        public string VideoSource { get; set; }
+
+        [JsonProperty("audioSource")]
+        public string AudioSource { get; set; }
+
+        [JsonProperty("usage")]
+        public int Usage { get; set; }
+
+        [JsonProperty("error")]
+        public string Error { get; set; }
+    }
+
+}

src/PepperDash.Essentials.Core/UDMApi/IUDMAPI.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PepperDash.Essentials.Core
+{
+    internal interface IUDMAPI
+    {
+    }
+}

src/PepperDash.Essentials.Core/UDMApi/RoomResponse.cs

@@ -0,0 +1,35 @@
+using System.Collections.Generic;
+using Newtonsoft.Json;
+
+namespace PepperDash.Essentials.Core
+{
+    /// <summary>
+    /// Represents the complete room response for UDM API
+    /// </summary>
+    internal class RoomResponse
+    {
+        /// <summary>
+        /// API version string
+        /// </summary>
+        [JsonProperty("apiVersion")]
+        public string ApiVersion { get; private set; }
+
+        /// <summary>
+        /// Standard room properties
+        /// </summary>
+        [JsonProperty("standard")]
+        public StandardProperties Standard { get; set; }
+
+        /// <summary>
+        /// Status information including devices
+        /// </summary>
+        [JsonProperty("status")]
+        public StatusProperties Status { get; set; }
+
+        /// <summary>
+        /// Custom properties dictionary
+        /// </summary>
+        [JsonProperty("custom")]
+        public Dictionary<string, CustomProperties> Custom { get; set; }
+    }
+}

src/PepperDash.Essentials.Core/UDMApi/StandardProperties.cs

@@ -0,0 +1,26 @@
+using Newtonsoft.Json;
+
+namespace PepperDash.Essentials.Core
+{
+    internal class StandardProperties
+    {
+        [JsonProperty("version")]
+        public string Version { get; set; }
+
+        [JsonProperty("state")]
+        public string State { get; set; }
+
+        [JsonProperty("error")]
+        public string Error { get; set; }
+
+        [JsonProperty("occupancy")]
+        public bool Occupancy { get; set; }
+
+        [JsonProperty("helpRequest")]
+        public string HelpRequest { get; set; }
+
+        [JsonProperty("activity")]
+        public string Activity { get; set; }
+    }
+
+}

src/PepperDash.Essentials.Core/UDMApi/StatusProperties.cs

@@ -0,0 +1,14 @@
+using Newtonsoft.Json;
+using System.Collections.Generic;
+
+namespace PepperDash.Essentials.Core
+{
+    internal class StatusProperties
+    {
+        /// <summary>
+        /// Dictionary of device statuses keyed by device identifier
+        /// </summary>
+        [JsonProperty("devices")]
+        public Dictionary<string, DeviceStatus> Devices { get; set; }
+    }
+}