Azure IoT SDK - IoT Hub
npm install azure-iothubThe Azure IoT Service SDK for Node.js helps you build applications that interact with your devices and manage their identities in your IoT hub.

[npm][npm_lnk] is a command-line package manager that is installed with Node.js is installed, and will be used to install Azure IoT node.js client side SDK.
npm install azure-iothub to get the latest version.
* Create/remove/update/list device identities in your IoT hub
* Send messages to your devices and get feedback when they're delivered
* Work with the Azure IoT Hub Device Twins
* Invoke Cloud to Device Direct Methods on a device
Once you have installed the package as indicated above, you can start using the features of the Service SDK in your code. Below is a code snippet showing how to add a new device in the Azure IoT Hub device registry:
Note that for this sample to work, you will need to [setup your IoT hub][lnk-setup-iot-hub] and retrieve credentials for the service app. Utilize the '[IoT Connection String]', in quotes, on the command line invoking the sample.
``js
var iothub = require('azure-iothub');
var connectionString = '[IoT Connection String]';
var registry = iothub.Registry.fromConnectionString(connectionString);
// Create a new device
var device = {
deviceId: 'sample-device-' + Date.now()
};
registry.create(device, function(err, deviceInfo, res) {
if (err) console.log(op + ' error: ' + err.toString());
if (res) console.log(op + ' status: ' + res.statusCode + ' ' + res.statusMessage);
if (deviceInfo) console.log(op + ' device info: ' + JSON.stringify(deviceInfo));
});
``
Check out the [samples][samples] for details on the various features of the Service SDK
* [Azure IoT Hub dev center][iot-dev-center]
* [Azure IoT Hub documentation][iot-hub-documentation]
* [Node.js API reference documentation][node-api-reference]
Service SDK subfolders:
Development requirements documentation
Code for the library
Set of simple samples showing how to use the features of the Service SDK
Test files
[nodejs_lnk]: https://nodejs.org/
[nodejs_dwld_lnk]: https://nodejs.org/en/download/
[npm_lnk]:https://docs.npmjs.com/getting-started/what-is-npm
[samples]: ./samples/
[lnk-setup-iot-hub]: https://aka.ms/howtocreateazureiothub
[node-api-reference]: https://docs.microsoft.com/en-us/javascript/api/azure-iothub/
[iot-dev-center]: http://azure.com/iotdev
[iot-hub-documentation]: https://docs.microsoft.com/en-us/azure/iot-hub/