diff --git a/packages/@azure/arm-iothub/LICENSE.txt b/packages/@azure/arm-iothub/LICENSE.txt
index a70e8cf66038..8f3d856145c5 100644
--- a/packages/@azure/arm-iothub/LICENSE.txt
+++ b/packages/@azure/arm-iothub/LICENSE.txt
@@ -1,21 +1,21 @@
-The MIT License (MIT)
-
-Copyright (c) 2018 Microsoft
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+The MIT License (MIT)
+
+Copyright (c) 2019 Microsoft
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/packages/@azure/arm-iothub/README.md b/packages/@azure/arm-iothub/README.md
index 7b46488b411b..fd95240c703b 100644
--- a/packages/@azure/arm-iothub/README.md
+++ b/packages/@azure/arm-iothub/README.md
@@ -1,96 +1,96 @@
-## Azure IotHubClient SDK for JavaScript
-
-This package contains an isomorphic SDK for IotHubClient.
-
-### Currently supported environments
-
-- Node.js version 6.x.x or higher
-- Browser JavaScript
-
-### How to Install
-
-```
-npm install @azure/arm-iothub
-```
-
-### How to use
-
-#### nodejs - Authentication, client creation and list operations as an example written in TypeScript.
-
-##### Install @azure/ms-rest-nodeauth
-
-```
-npm install @azure/ms-rest-nodeauth
-```
-
-##### Sample code
-
-```ts
-import * as msRest from "@azure/ms-rest-js";
-import * as msRestAzure from "@azure/ms-rest-azure-js";
-import * as msRestNodeAuth from "@azure/ms-rest-nodeauth";
-import { IotHubClient, IotHubModels, IotHubMappers } from "@azure/arm-iothub";
-const subscriptionId = process.env["AZURE_SUBSCRIPTION_ID"];
-
-msRestNodeAuth.interactiveLogin().then((creds) => {
-  const client = new IotHubClient(creds, subscriptionId);
-  client.operations.list().then((result) => {
-    console.log("The result is:");
-    console.log(result);
-  });
-}).catch((err) => {
-  console.error(err);
-});
-```
-
-#### browser - Authentication, client creation and list operations as an example written in JavaScript.
-
-##### Install @azure/ms-rest-browserauth
-
-```
-npm install @azure/ms-rest-browserauth
-```
-
-##### Sample code
-
-See https://github.com/Azure/ms-rest-browserauth to learn how to authenticate to Azure in the browser.
-
-- index.html
-```html
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <title>@azure/arm-iothub sample</title>
-    <script src="node_modules/@azure/ms-rest-js/dist/msRest.browser.js"></script>
-    <script src="node_modules/@azure/ms-rest-azure-js/dist/msRestAzure.js"></script>
-    <script src="node_modules/@azure/ms-rest-browserauth/dist/msAuth.js"></script>
-    <script src="node_modules/@azure/arm-iothub/dist/arm-iothub.js"></script>
-    <script type="text/javascript">
-      const subscriptionId = "<Subscription_Id>";
-      const authManager = new msAuth.AuthManager({
-        clientId: "<client id for your Azure AD app>",
-        tenant: "<optional tenant for your organization>"
-      });
-      authManager.finalizeLogin().then((res) => {
-        if (!res.isLoggedIn) {
-          // may cause redirects
-          authManager.login();
-        }
-        const client = new Azure.ArmIothub.IotHubClient(res.creds, subscriptionId);
-        client.operations.list().then((result) => {
-          console.log("The result is:");
-          console.log(result);
-        }).catch((err) => {
-          console.log("An error occurred:");
-          console.error(err);
-        });
-      });
-    </script>
-  </head>
-  <body></body>
-</html>
-```
-
-## Related projects
-
-- [Microsoft Azure SDK for Javascript](https://github.com/Azure/azure-sdk-for-js)
+## Azure IotHubClient SDK for JavaScript
+
+This package contains an isomorphic SDK for IotHubClient.
+
+### Currently supported environments
+
+- Node.js version 6.x.x or higher
+- Browser JavaScript
+
+### How to Install
+
+```bash
+npm install @azure/arm-iothub
+```
+
+### How to use
+
+#### nodejs - Authentication, client creation and list operations as an example written in TypeScript.
+
+##### Install @azure/ms-rest-nodeauth
+
+```bash
+npm install @azure/ms-rest-nodeauth
+```
+
+##### Sample code
+
+```typescript
+import * as msRest from "@azure/ms-rest-js";
+import * as msRestAzure from "@azure/ms-rest-azure-js";
+import * as msRestNodeAuth from "@azure/ms-rest-nodeauth";
+import { IotHubClient, IotHubModels, IotHubMappers } from "@azure/arm-iothub";
+const subscriptionId = process.env["AZURE_SUBSCRIPTION_ID"];
+
+msRestNodeAuth.interactiveLogin().then((creds) => {
+  const client = new IotHubClient(creds, subscriptionId);
+  client.operations.list().then((result) => {
+    console.log("The result is:");
+    console.log(result);
+  });
+}).catch((err) => {
+  console.error(err);
+});
+```
+
+#### browser - Authentication, client creation and list operations as an example written in JavaScript.
+
+##### Install @azure/ms-rest-browserauth
+
+```bash
+npm install @azure/ms-rest-browserauth
+```
+
+##### Sample code
+
+See https://github.com/Azure/ms-rest-browserauth to learn how to authenticate to Azure in the browser.
+
+- index.html
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <title>@azure/arm-iothub sample</title>
+    <script src="node_modules/@azure/ms-rest-js/dist/msRest.browser.js"></script>
+    <script src="node_modules/@azure/ms-rest-azure-js/dist/msRestAzure.js"></script>
+    <script src="node_modules/@azure/ms-rest-browserauth/dist/msAuth.js"></script>
+    <script src="node_modules/@azure/arm-iothub/dist/arm-iothub.js"></script>
+    <script type="text/javascript">
+      const subscriptionId = "<Subscription_Id>";
+      const authManager = new msAuth.AuthManager({
+        clientId: "<client id for your Azure AD app>",
+        tenant: "<optional tenant for your organization>"
+      });
+      authManager.finalizeLogin().then((res) => {
+        if (!res.isLoggedIn) {
+          // may cause redirects
+          authManager.login();
+        }
+        const client = new Azure.ArmIothub.IotHubClient(res.creds, subscriptionId);
+        client.operations.list().then((result) => {
+          console.log("The result is:");
+          console.log(result);
+        }).catch((err) => {
+          console.log("An error occurred:");
+          console.error(err);
+        });
+      });
+    </script>
+  </head>
+  <body></body>
+</html>
+```
+
+## Related projects
+
+- [Microsoft Azure SDK for Javascript](https://github.com/Azure/azure-sdk-for-js)
diff --git a/packages/@azure/arm-iothub/lib/iotHubClientContext.ts b/packages/@azure/arm-iothub/lib/iotHubClientContext.ts
index 4e27860b04d5..a3e9918087ca 100644
--- a/packages/@azure/arm-iothub/lib/iotHubClientContext.ts
+++ b/packages/@azure/arm-iothub/lib/iotHubClientContext.ts
@@ -13,7 +13,7 @@ import * as msRest from "@azure/ms-rest-js";
 import * as msRestAzure from "@azure/ms-rest-azure-js";
 
 const packageName = "@azure/arm-iothub";
-const packageVersion = "0.1.0";
+const packageVersion = "2.1.0";
 
 export class IotHubClientContext extends msRestAzure.AzureServiceClient {
   credentials: msRest.ServiceClientCredentials;
@@ -44,7 +44,7 @@ export class IotHubClientContext extends msRestAzure.AzureServiceClient {
 
     super(credentials, options);
 
-    this.apiVersion = '2018-04-01';
+    this.apiVersion = '2018-12-01-preview';
     this.acceptLanguage = 'en-US';
     this.longRunningOperationRetryTimeout = 30;
     this.baseUri = options.baseUri || this.baseUri || "https://management.azure.com";
diff --git a/packages/@azure/arm-iothub/lib/models/certificatesMappers.ts b/packages/@azure/arm-iothub/lib/models/certificatesMappers.ts
index 063684f78e5f..06bd7fe28ea3 100644
--- a/packages/@azure/arm-iothub/lib/models/certificatesMappers.ts
+++ b/packages/@azure/arm-iothub/lib/models/certificatesMappers.ts
@@ -38,6 +38,7 @@ export {
   CloudToDeviceProperties,
   FeedbackProperties,
   OperationsMonitoringProperties,
+  IotHubPropertiesDeviceStreams,
   IotHubSkuInfo
 } from "../models/mappers";
 
diff --git a/packages/@azure/arm-iothub/lib/models/index.ts b/packages/@azure/arm-iothub/lib/models/index.ts
index e621acb66598..7dbdcc0668e2 100644
--- a/packages/@azure/arm-iothub/lib/models/index.ts
+++ b/packages/@azure/arm-iothub/lib/models/index.ts
@@ -492,11 +492,11 @@ export interface RoutingStorageContainerProperties {
    */
   maxChunkSizeInBytes?: number;
   /**
-   * @member {string} [encoding] Encoding that is used to serialize messages to
-   * blobs. Supported values are 'avro' and 'avrodeflate'. Default value is
-   * 'avro'.
+   * @member {Encoding} [encoding] Encoding that is used to serialize messages
+   * to blobs. Supported values are 'avro', 'avrodeflate', and 'JSON'. Default
+   * value is 'avro'. Possible values include: 'Avro', 'AvroDeflate', 'JSON'
    */
-  encoding?: string;
+  encoding?: Encoding;
 }
 
 /**
@@ -647,8 +647,8 @@ export interface RoutingProperties {
  */
 export interface StorageEndpointProperties {
   /**
-   * @member {string} [sasTtlAsIso8601] The period of time for which the the
-   * SAS URI generated by IoT Hub for file upload is valid. See:
+   * @member {string} [sasTtlAsIso8601] The period of time for which the SAS
+   * URI generated by IoT Hub for file upload is valid. See:
    * https://docs.microsoft.com/azure/iot-hub/iot-hub-devguide-file-upload#file-upload-notification-configuration-options.
    */
   sasTtlAsIso8601?: string;
@@ -759,6 +759,19 @@ export interface OperationsMonitoringProperties {
   events?: { [propertyName: string]: OperationMonitoringLevel };
 }
 
+/**
+ * @interface
+ * An interface representing IotHubPropertiesDeviceStreams.
+ * The device streams properties of iothub.
+ *
+ */
+export interface IotHubPropertiesDeviceStreams {
+  /**
+   * @member {string[]} [streamingEndpoints] List of Device Streams Endpoints.
+   */
+  streamingEndpoints?: string[];
+}
+
 /**
  * @interface
  * An interface representing IotHubProperties.
@@ -783,7 +796,7 @@ export interface IotHubProperties {
    */
   readonly provisioningState?: string;
   /**
-   * @member {string} [state] Thehub state state.
+   * @member {string} [state] The hub state.
    * **NOTE: This property will not be serialized. It can only be populated by
    * the server.**
    */
@@ -839,6 +852,11 @@ export interface IotHubProperties {
    * @member {OperationsMonitoringProperties} [operationsMonitoringProperties]
    */
   operationsMonitoringProperties?: OperationsMonitoringProperties;
+  /**
+   * @member {IotHubPropertiesDeviceStreams} [deviceStreams] The device streams
+   * properties of iothub.
+   */
+  deviceStreams?: IotHubPropertiesDeviceStreams;
   /**
    * @member {Capabilities} [features] The capabilities and features enabled
    * for the IoT hub. Possible values include: 'None', 'DeviceManagement'
@@ -957,6 +975,12 @@ export interface OperationDisplay {
    * the server.**
    */
   readonly operation?: string;
+  /**
+   * @member {string} [description] Description of the operation
+   * **NOTE: This property will not be serialized. It can only be populated by
+   * the server.**
+   */
+  readonly description?: string;
 }
 
 /**
@@ -1052,8 +1076,19 @@ export interface EndpointHealthData {
    */
   endpointId?: string;
   /**
-   * @member {EndpointHealthStatus} [healthStatus] Health status. Possible
-   * values include: 'unknown', 'healthy', 'unhealthy', 'dead'
+   * @member {EndpointHealthStatus} [healthStatus] Health statuses have
+   * following meanings. The 'healthy' status shows that the endpoint is
+   * accepting messages as expected. The 'unhealthy' status shows that the
+   * endpoint is not accepting messages as expected and IoT Hub is retrying to
+   * send data to this endpoint. The status of an unhealthy endpoint will be
+   * updated to healthy when IoT Hub has established an eventually consistent
+   * state of health. The 'dead' status shows that the endpoint is not
+   * accepting messages, after IoT Hub retried sending messages for the retrial
+   * period. See IoT Hub metrics to identify errors and monitor issues with
+   * endpoints. The 'unknown' status shows that the IoT Hub has not established
+   * a connection with the endpoint. No messages have been delivered to or
+   * rejected from this endpoint. Possible values include: 'unknown',
+   * 'healthy', 'unhealthy', 'dead'
    */
   healthStatus?: EndpointHealthStatus;
 }
@@ -1398,13 +1433,13 @@ export interface RoutingMessage {
  */
 export interface RoutingTwinProperties {
   /**
-   * @member {any} [desiredProperties] Twin desired properties
+   * @member {any} [desired] Twin desired properties
    */
-  desiredProperties?: any;
+  desired?: any;
   /**
-   * @member {any} [reportedProperties] Twin desired properties
+   * @member {any} [reported] Twin desired properties
    */
-  reportedProperties?: any;
+  reported?: any;
 }
 
 /**
@@ -1979,6 +2014,14 @@ export type TestResultStatus = 'undefined' | 'false' | 'true';
  */
 export type RouteErrorSeverity = 'error' | 'warning';
 
+/**
+ * Defines values for Encoding.
+ * Possible values include: 'Avro', 'AvroDeflate', 'JSON'
+ * @readonly
+ * @enum {string}
+ */
+export type Encoding = 'Avro' | 'AvroDeflate' | 'JSON';
+
 /**
  * Contains response data for the list operation.
  */
diff --git a/packages/@azure/arm-iothub/lib/models/iotHubResourceMappers.ts b/packages/@azure/arm-iothub/lib/models/iotHubResourceMappers.ts
index edcf42a6f5d8..c8a209fa4571 100644
--- a/packages/@azure/arm-iothub/lib/models/iotHubResourceMappers.ts
+++ b/packages/@azure/arm-iothub/lib/models/iotHubResourceMappers.ts
@@ -29,6 +29,7 @@ export {
   CloudToDeviceProperties,
   FeedbackProperties,
   OperationsMonitoringProperties,
+  IotHubPropertiesDeviceStreams,
   IotHubSkuInfo,
   ErrorDetails,
   TagsResource,
diff --git a/packages/@azure/arm-iothub/lib/models/mappers.ts b/packages/@azure/arm-iothub/lib/models/mappers.ts
index ffafd0911b12..002cd093384d 100644
--- a/packages/@azure/arm-iothub/lib/models/mappers.ts
+++ b/packages/@azure/arm-iothub/lib/models/mappers.ts
@@ -965,6 +965,27 @@ export const OperationsMonitoringProperties: msRest.CompositeMapper = {
   }
 };
 
+export const IotHubPropertiesDeviceStreams: msRest.CompositeMapper = {
+  serializedName: "IotHubProperties_deviceStreams",
+  type: {
+    name: "Composite",
+    className: "IotHubPropertiesDeviceStreams",
+    modelProperties: {
+      streamingEndpoints: {
+        serializedName: "streamingEndpoints",
+        type: {
+          name: "Sequence",
+          element: {
+            type: {
+              name: "String"
+            }
+          }
+        }
+      }
+    }
+  }
+};
+
 export const IotHubProperties: msRest.CompositeMapper = {
   serializedName: "IotHubProperties",
   type: {
@@ -1085,6 +1106,13 @@ export const IotHubProperties: msRest.CompositeMapper = {
           className: "OperationsMonitoringProperties"
         }
       },
+      deviceStreams: {
+        serializedName: "deviceStreams",
+        type: {
+          name: "Composite",
+          className: "IotHubPropertiesDeviceStreams"
+        }
+      },
       features: {
         serializedName: "features",
         type: {
@@ -1240,6 +1268,13 @@ export const OperationDisplay: msRest.CompositeMapper = {
         type: {
           name: "String"
         }
+      },
+      description: {
+        readOnly: true,
+        serializedName: "description",
+        type: {
+          name: "String"
+        }
       }
     }
   }
@@ -1808,14 +1843,14 @@ export const RoutingTwinProperties: msRest.CompositeMapper = {
     name: "Composite",
     className: "RoutingTwinProperties",
     modelProperties: {
-      desiredProperties: {
-        serializedName: "desiredProperties",
+      desired: {
+        serializedName: "desired",
         type: {
           name: "Object"
         }
       },
-      reportedProperties: {
-        serializedName: "reportedProperties",
+      reported: {
+        serializedName: "reported",
         type: {
           name: "Object"
         }
diff --git a/packages/@azure/arm-iothub/package.json b/packages/@azure/arm-iothub/package.json
index 65b852e5fe63..2ffb54125116 100644
--- a/packages/@azure/arm-iothub/package.json
+++ b/packages/@azure/arm-iothub/package.json
@@ -4,8 +4,8 @@
   "description": "IotHubClient Library with typescript type definitions for node.js and browser.",
   "version": "2.1.0",
   "dependencies": {
-    "@azure/ms-rest-azure-js": "^1.1.0",
-    "@azure/ms-rest-js": "^1.1.0",
+    "@azure/ms-rest-azure-js": "^1.2.0",
+    "@azure/ms-rest-js": "^1.2.0",
     "tslib": "^1.9.3"
   },
   "keywords": [
@@ -23,6 +23,7 @@
     "typescript": "^3.1.1",
     "rollup": "^0.66.2",
     "rollup-plugin-node-resolve": "^3.4.0",
+    "rollup-plugin-sourcemaps": "^0.4.2",
     "uglify-js": "^3.4.9"
   },
   "homepage": "https://github.com/azure/azure-sdk-for-js/tree/master/packages/@azure/arm-iothub",
@@ -51,6 +52,5 @@
     "minify": "uglifyjs -c -m --comments --source-map \"content='./dist/arm-iothub.js.map'\" -o ./dist/arm-iothub.min.js ./dist/arm-iothub.js",
     "prepack": "npm install && npm run build"
   },
-  "sideEffects": false,
-  "authPublish": true
+  "sideEffects": false
 }
diff --git a/packages/@azure/arm-iothub/rollup.config.js b/packages/@azure/arm-iothub/rollup.config.js
index 0209b0ba1400..8464171f6338 100644
--- a/packages/@azure/arm-iothub/rollup.config.js
+++ b/packages/@azure/arm-iothub/rollup.config.js
@@ -1,10 +1,16 @@
+import rollup from "rollup";
 import nodeResolve from "rollup-plugin-node-resolve";
+import sourcemaps from "rollup-plugin-sourcemaps";
+
 /**
- * @type {import('rollup').RollupFileOptions}
+ * @type {rollup.RollupFileOptions}
  */
 const config = {
-  input: './esm/iotHubClient.js',
-  external: ["@azure/ms-rest-js", "@azure/ms-rest-azure-js"],
+  input: "./esm/iotHubClient.js",
+  external: [
+    "@azure/ms-rest-js",
+    "@azure/ms-rest-azure-js"
+  ],
   output: {
     file: "./dist/arm-iothub.js",
     format: "umd",
@@ -16,16 +22,16 @@ const config = {
     },
     banner: `/*
  * Copyright (c) Microsoft Corporation. All rights reserved.
- * Licensed under the MIT License. See License.txt in the project root for
- * license information.
+ * Licensed under the MIT License. See License.txt in the project root for license information.
  *
  * Code generated by Microsoft (R) AutoRest Code Generator.
- * Changes may cause incorrect behavior and will be lost if the code is
- * regenerated.
+ * Changes may cause incorrect behavior and will be lost if the code is regenerated.
  */`
   },
   plugins: [
-    nodeResolve({ module: true })
+    nodeResolve({ module: true }),
+    sourcemaps()
   ]
 };
+
 export default config;