What is Azure IoT Hub?

Azure IoT Hub is a fully managed service that enables reliable and secure bidirectional communications between millions of IoT devices and a solution back end. Azure IoT Hub:

  • Provides reliable device-to-cloud and cloud-to-device messaging at scale.
  • Enables secure communications using per-device security credentials and access control.
  • Provides extensive monitoring for device connectivity and device identity management events.
  • Includes device libraries for the most popular languages and platforms.
Azure IoT Hub addresses the device-connectivity challenges in the following ways:
  • Per-device authentication and secure connectivity.
  • Monitoring of device connectivity operations.
  • An extensive set of device libraries.
  • IoT protocols and extensibility.
  • Scale. 
  • Event-based device-to-cloud ingestion.
  • Reliable cloud-to-device messaging (or commands). 
By using Azure IoT hub, we can easily establish an environment which enables simple and reliable deployment and communication between devices and service back-end.
The hub plays as a "bridge" role supporting lots of protocols making the generality for IoT communication.
Azure IoT hub may accelerate the development of  IoT technology.

Reference : https://azure.microsoft.com/en-us/documentation/articles/iot-hub-what-is-iot-hub/

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