About the 21.05 release

Azure Sphere did not release an updated OS or SDK for 21.05. Documentation updates include minor bug fixes and other updates, and two new projects were added to the Azure Sphere Gallery.

New and revised documentation in the 21.05 release

Article    Changes 
Networking connectivity overview Added a sentence about the communications interface being non-deterministic for multihomed devices
Memory use in high-level applications Added a note about avoiding unnecessary flash updates
Using storage on Azure Sphere Added a note about avoiding unnecessary flash updates
Code for renewable security New topic on best practices for writing code for renewable security
Hardware design verification Revised the steps to improve clarity
Applibs application.h Removed links to obsolete libraries
Applibs networking.h Removed links to obsolete libraries

Two new projects were added to the Azure Sphere Gallery, a collection of unmaintained scripts, utilities, and functions:

  • MQTT project demonstrates how to add Message Queuing Telemetry Transport (MQTT) support to an Azure Sphere project.

  • Azure Sphere Tenant Device Twin Sync shows how to use Azure IoT telemetry events to trigger queries to the Azure Sphere Security Service for properties about that device, and how to update the device's Device Twin.