Azure IoT Hub – Overview

Azure IoT Hub is a fully managed service that enables reliable and secure bi‑directional communication between millions of IoT devices and a cloud‑based backend. It provides device provisioning, device management, and advanced messaging capabilities that are essential for building scalable IoT solutions.

Key Benefits

• Secure device-to-cloud and cloud-to-device communication using per-device authentication.
• Supports MQTT, HTTPS, AMQP, and AMQP over WebSockets.
• Device provisioning at scale with Azure Device Provisioning Service (DPS).
• Integrated with Azure Stream Analytics, Azure Functions, and Azure Time Series Insights.

Architecture Diagram

Sample Code (C#)

using Microsoft.Azure.Devices;
using System;
using System.Text;
using System.Threading.Tasks;

class Program
{
    private const string iotHubConnectionString = "";
    private const string deviceId = "myDevice";

    static async Task Main(string[] args)
    {
        var serviceClient = ServiceClient.CreateFromConnectionString(iotHubConnectionString);
        var commandMessage = new Message(Encoding.ASCII.GetBytes("Hello from cloud!"));
        await serviceClient.SendAsync(deviceId, commandMessage);
        Console.WriteLine("Message sent");
    }
}

Next Steps

Start building your solution by following the Getting Started guide, explore the feature set, or learn about security best practices.