Azure Sphere trusted keystore is updated; OS version 22.11 is now available for evaluation
Published Nov 14 2022 03:44 PM 3,744 Views
Steel Contributor

Trusted Keystore (TKS) update 

We have released an update to the trusted keystore of Azure Sphere devices which will result in all devices (regardless of whether they are on the Retail or Retail Eval feed) installing this update and rebooting.  This small update does not change the OS version. For more information, see Azure Sphere – Image signing certificate update. 


OS version 22.11 available for retail evaluation devices 

Azure Sphere OS version 22.11 is now available for evaluation in the Retail Eval feed. The retail evaluation period provides 17 days for backwards compatibility testing. We have decided to increase the duration of this retail evaluation period by 3 days as compared to the normal 14 days for this release because of US holidays this month. During this time, please verify that your applications and devices operate properly with this release before it's deployed broadly via the Retail feed. The Retail feed will continue to deliver OS version 22.10 until we publish the 22.11 update in two and a half weeks. 


Devices in Retail Eval will reboot twice, due to first applying the TKS update and then applying the 22.11 OS update. 


The evaluation release of version 22.11 includes an OS update only; it does not include an updated SDK. When 22.11 is generally available in December, an updated SDK will be included. Areas of special focus for compatibility testing with 22.11 should include apps and functionality utilizing: 


  • DHCP for IP address and DNS server configuration, and any custom DNS control 
  • Malloc, manual memory management, and any MUSL calls including multi-threaded initialization 
  • IoT Hub and IoT C SDK features 


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 inquiries or technical support, please review the Azure Sphere support options. 

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‎Nov 14 2022 03:44 PM
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