Release: Amazon IoT Greengrass Core v2.5.5 software update on April 6, 2022 - Amazon IoT Greengrass
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Release: Amazon IoT Greengrass Core v2.5.5 software update on April 6, 2022

This release provides version 2.5.5 of the Greengrass nucleus component.

Release date: April 6, 2022

Public component updates

The following table lists Amazon-provided components that include new and updated features.


When you deploy a component, Amazon IoT Greengrass installs the latest supported versions of all of that component's dependencies. Because of this, new patch versions of Amazon-provided public components might be automatically deployed to your core devices if you add new devices to a thing group, or you update the deployment that targets those devices. Some automatic updates, such as a nucleus update, can cause your devices to restart unexpectedly.

To prevent unintended updates for a component that is running on your device, we recommend that you directly include your preferred version of that component when you create a deployment. For more information about update behavior for Amazon IoT Greengrass Core software, see Update the Amazon IoT Greengrass Core software (OTA).

Component Details
Greengrass nucleus

Version 2.5.5 of the Greengrass nucleus is available.

New features
  • Adds the GG_ROOT_CA_PATH environment variable for components, so you can access the root certificate authority (CA) certificate in custom components.

Bug fixes and improvements
  • Adds support for Windows devices that use a display language other than English.

  • Updates how the Greengrass nucleus parses Boolean installer arguments, so you can specify a Boolean argument without a Boolean value to specify a true value. For example, you can now specify --provision instead of --provision true to install with automatic resource provisioning.

  • Fixes an issue where the core device didn't report its status to the Amazon IoT Greengrass cloud service after provisioning in certain scenarios.

  • Additional minor fixes and improvements.