BESC Azure IoT-Hub SDK Integrated System

Create an IoT Hub

This section describe how to create an IoT Hub using the Azure portal.

1. Sign in to the Azure portal.
2. Choose Create a resource, and then enter IoT Hub in the Search the Marketplace field.
3. Select IoT Hub from the search results, and then select Create.
4. On the Basics tab, complete the fields as follows:
   • Subscription: Select the subscription to use for your hub.
   • Resource Group: Select a resource group or create a new one. To create a new one, select Create new and fill in the name you want to use. To use an existing resource group, select that resource group. For more information, see Manage Azure Resource Manager resource groups.
   • Region: Select the region in which you want your hub to be located. Select the location closest to you.
   • IoT Hub Name: Enter a name for your hub. This name must be globally unique. If the name you enter is available, a green check mark appears.
5. Select Next: Size and scale to continue creating your hub
6. Select Review + create to review your choices.
7. Select Create to create your new hub. Creating the hub takes a few minutes.

Register a device

A device must be registered with your IoT Hub before it can connect. Use Azure Cloud Shell to register a device for gateway.

1. Run the following command in Azure Cloud Shell to create device identity.

   YourIoTHubName: Replace this placeholder below with the name you chose for your IoT hub.

   MyNodeDevice: This is the name of the device you're registering. It's recommended to use MyNodeDevice as shown. If you choose a different name for your device, you'll also need to use that name throughout this article, and update the device name in the sample applications before you run them.

az iot hub device-identity create --hub-name {YourIoTHubName} --device-id MyNodeDevice

2. Run the following command in Azure Cloud Shell to get the device connection string for the device you just registered:

   YourIoTHubName: Replace this placeholder below with the name you chose for your IoT hub.

   az iot hub device-identity show-connection-string --hub-name {YourIoTHubName} --device-id MyNodeDevice --output table
   

Reference Link

A complete guide of creating IoT Hub using Azure portal and register devices for IoT Hub is available in this link below:

https://docs.microsoft.com/en-us/azure/iot-hub/quickstart-send-telemetry-node

Configure Environment File

There is a file named ".env" in the folder, it will be setting for the application

Sample:

CONNECTIONSTRING=HostName=MQTTBESC.azure-devices.net;DeviceId=device1;SharedAccessKey=hKshJEki4vRtQFbmVD6nSvjumi4L7gE0746IT+Fc5YQ=
ENERGY_DATA_PATH=./devicedata.json
REPEAT_EVERY_MINUTES=1

Explanation:

KEY	DESCRIPTION
CONNECTIONSTRING	A secret device connection string provided by Azure IoT Hub to send energy data to cloud. Can be retrieve using Azure CLI.
ENERGY_DATA_PATH	A file path that are used to locate the devicedata.json file that stores existing energy data.
REPEAT_EVERY_MINUTES	Repeat the reading of devicedata.json and data pushing to IoT Hub every n minutes.

Starting the application

npm install
node server.js

Sample Output:

Sending message: {
    "Devices": [{
        "name": "Device 4",
        "energy": 112333
        "name": "Device 3",
        "energy": 210.23
    }, {
        "name": "Device 1",
        "energy": 143.32
    }, {
        "name": "Device 2",
        "energy": 34534.2
    }]
}
message sent

NOTE

Run the server sdk https://github.com/epc-blockchain/MQTT-Pull-Azure collect pushed data.