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General availability: Azure Sphere OS version 21.09

Published date: September 22, 2021

Azure Sphere OS version 21.09 is now available in the Retail feed. This quality release includes bug fixes in the Azure Sphere OS; it does not include an updated SDK. If your devices are connected to the internet, they will receive the updated OS from the cloud.

Updates to the Azure Sphere OS include

  • Upgraded Linux Kernel to 5.10.60.
  • Improvements to crash handling to prevent hangs.

New and updated Gallery projects for 21.09

  • RS-485 real-time driver  demonstrates how to use an M4F core on MT3620 to implement reliable RS-485 communication with inter-core communication to the high-level app on the A7 core.

For more information on documentation updates, see New and revised documentation in the 21.09 release.

For more information on Azure Sphere OS feeds and setting up an evaluation device group, see Azure Sphere OS feeds and Set up devices for OS evaluation.

For self-help technical inquiries, please visit Microsoft Q&A or Stack Overflow. If you require technical support and have a support plan, please submit a support ticket in Microsoft Azure Support or work with your Microsoft Technical Account Manager. If you would like to purchase a support plan, please explore the Azure support plans.

  • Azure Sphere
  • Operating System

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