Update readme.md

Author: Renhe Li

Device/Readme.md

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+# Door Monitor
+
+## Steps to start
+
+1. Setup development environment by following [Get Started](https://microsoft.github.io/azure-iot-developer-kit/docs/get-started/)
+1. Open VS Code
+1. Press **F1** or **Ctrl + Shift + P** - `IoT Workbench: Examples` and select DoorMonitor
+
+## Deploy SendGrid service in Azure
+
+1. click the Deploy to Azure button below and deploy SendGrid Service.
+
+    [![Deploy to Azure](http://azuredeploy.net/deploybutton.png)](https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.githubusercontent.com%2FIoTDevEnvExamples%2FDevKitDoorMonitor%2Fdeploy%2FSendGridDeploy%2Fazuredeploy.json)
+
+1. After the deployment succeeds, click the resource and then click the **Manage** button. You are taken to your SendGrid page, and need to verify your email address.
+
+1. On the SendGrid page, click Settings > API Keys > Create API Key. Input the API Key Name and click Create & View.
+
+1. Copy the API key.
+
+## Creating the Azure Logic App
+
+1. Open the [Azure Portal](https://portal.azure.com)
+1. Select the **+** or **Create a resource** button and under **Enterprise Integration** choose **Logic App**
+1. Give it a Name, Resource Group, and Region (any will do) and click **Create**
+1. After the logic app is created, open it
+1. The designer should automatically load - if not click the **Edit** button
+1. Select the **When an HTTP request is received** trigger
+1. Click **New Step** to add a step to the workflow and **Add an action**
+1. Search for the key word of **Send email** action.
+    > NOTE: You are more than welcome to use any action you want to perform on an IoT event
+1. Select the **SendGrid - Send email(V2)** action and provide the detailed information of the email.
+1. Authenticate this logic app by using the SendGrid API key you created before..
+
+1. Click the **Save** button to save this serverless workflow.
+1. Click the **When a HTTP request is received** card to open and reveal the URL generated after saving.  Copy that URL.
+
+
+
+## Provision Azure Services
+
+1. Press **F1** or **Ctrl + Shift + P** in Visual Studio Code - **IoT Workbench:Cloud** and click **Azure Provision**
+1. Select a subscription.
+1. Select or choose a resource group.
+1. Select or create an IoT Hub.
+1. Wait for the deployment.
+1. Select or create an IoT Hub device. Please take a note of the device name.
+1. Create Function App.
+1. Wait for the deployment.
+
+## Deploy Function App
+1. Open shakeshake\run.csx and modify the following line with the URL you created in the previous step.
+```
+var response = await client.PostAsync("https://prod-1....", httpContent);
+```
+1. ress **F1** or **Ctrl + Shift + P** in Visual Studio Code - **IoT Workbench: Cloud** and click **Azure Deploy**.
+1. Wait for function app code uploading.
+
+## Configure IoT Hub Device Connection String in DevKit
+
+1. Connect your DevKit to your machine.
+1. Press **F1** or **Ctrl + Shift + P** in Visual Studio Code - **IoT Workbench: Device** and click **config-device-connection**.
+1. Hold button A on DevKit, then press rest button, and then release button A to enter config mode.
+1. Wait for connection string configuration to complete.
+
+## Upload Arduino Code to DevKit
+
+1. Connect your DevKit to your machine.
+1. Press **F1** or **Ctrl + Shift + P** in Visual Studio Code - **IoT Workbench:Device** and click **Device Upload**.
+1. Wait for arduino code uploading.

README.md

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 # DevKitDoorMonitor
+
+DoorMonitor for IoT Workbench
+
+Please follow the [guide](/Device/Readme.md) to run DoorMonitor in IoT Workbench.