How-to-test-Azure-Iot-with-MQTT.md

+## 1. First please add a test hub in your Azure account:
+
+[click to open](https://portal.azure.com/#blade/HubsExtension/BrowseResource/resourceType/Microsoft.Devices%2FIotHubs)
+
+![批注_2020-03-04_180108](uploads/722386be7a7ad8824aa8c2fa31ea2931/批注_2020-03-04_180108.png)
+
+you need to create a IoT Hub and a Resource Group
+
+## 2. Add device
+
+![批注_2020-03-04_180409](uploads/bc51f6ef66e1b5b54ebb3017a30d47cb/批注_2020-03-04_180409.png)
+
+
+## 3. Choose device certification method
+
+* To Use CertifiateAuthority
+
+we need to download tools to create the certificates for the device.
+
+[Here is How](https://github.com/Azure/azure-iot-sdk-c/blob/master/tools/CACertificates/CACertificateOverview.md)
+
+For the 3rd party mqtt test tool such MQTT FX, you may need to download the Root Certicate at: https://github.com/Azure/azure-iot-sdk-c/blob/master/certs/certs.c, but for the HMI PM4, we don't need it.
+
+* To Use SAS password
+
+we need to install VisualStudio Code Azure Extension to apply the SAS password
+
+## 4. Tools
+
+1. Azure CLI
+
+[here](https://docs.microsoft.com/en-us/cli/azure/?view=azure-cli-latest)
+
+and need to install Azure IoT extension 
+
+[here](https://github.com/Azure/azure-iot-cli-extension/blob/master/README.md)
+
+
+2. VSCode Azure Extension
+
+[here](https://marketplace.visualstudio.com/items?itemName=ms-vscode.azurecli)
\ No newline at end of file