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This is an example meta layer used for building SD Image for Raspberry Pi 3B+ device that enabled the following functionalities:
- IoT Hub Device Update Agent
- SWUpdate and SWUpdate V2 handlers
- Script handler
- Delta Downloader (for Delta-update support)
- Device Update data partition (/adu)
- Delivery Optimization Agent
- Custom swupdate that supports:
- zstd compression
- custom hardware compat file (/etc/adu-swupdate-hw-compat)
- Dual-partition (A/B) Update
- adu-raspberrypi.wks creates 2 file system partitions to support A/B update.
In addition, this layer also produces SWU file that can be used for updating the previous version of the image, using swupdate tool.
This layer contains the following recipes:
| Recipe Name | Description |
|---|---|
| recipes-bsp | Customizes uboot script to support A/B update strategy. This is required for SWUpdate Handler (for demonstration or reference purposes). |
| recipes-core | Customizes fstab to add the 2nd root file system partition (for A/B update strategy) and Device Update data partition (/adu).This recipe also defines what is included in the base image (adu-base-image). |
| recipes-extended | This recipe defines what is included in the .swu file (adu-update-image). |
| recipes-graphics | Includes graphics component for the target device. |
| recipes-support | Creates a customized version of swupdate tool that enabled configurations required by SWUpdate Handler and the Delta Downloader. |
| wic | For .wic format support. |