# AOS 2.8.1

## Compatibility

This version of AuterionOS comes bundled with APX4 2.7.6:

{% content-ref url="../../../flight-control/apx4-2.7/apx4-2.7.7" %}
[apx4-2.7.7](https://docs.auterion.com/release-notes/flight-control/apx4-2.7/apx4-2.7.7)
{% endcontent-ref %}

Please use Auterion Mission Control 1.17.9 or newer with this version of AOS:

{% content-ref url="../../../auterion-mission-control-release-notes/amc-1.17/amc-1.17.10" %}
[amc-1.17.10](https://docs.auterion.com/release-notes/auterion-mission-control-release-notes/amc-1.17/amc-1.17.10)
{% endcontent-ref %}

{% hint style="info" %}
If you are updating from a version older than 2.4, please first update to the latest 2.5 before updating to latest version otherwise an error message will be displayed in the Skynode web UI.
{% endhint %}

## What improved <a href="#what-improved.1" id="what-improved.1"></a>

* AuterionOS:
  * major RTPS/DDS refactoring. Some old logic was fully removed (eg. protocol splitter) since we are now using RTPS over the ethernet and not the uart anymore
  * improve error handling during a skynode update. Some critical errors would previously be ignored while others that could be ignored were making the update fail anyway.
  * Fix target architecture issue that could randomly make production builds fail in CI
  * Remove some leftovers from the repartitioner feature that was used in release 2.4 to 2.6 to increase the rootfs on already fielded skynodes.
  * Refactor sysinfo api especially for the diagnostic report generation and for the device specific logic (eg. logic only for skynode)
  * Add nginx error log to the diagnostic report
  * Change Apps logging backend to also use journald
* Suite service:
  * Add logic to queue post params after a set many job
  * Add a new worker to run asyncio jobs
* Payload manager:
  * Fixed issue where occasionally Trillium would not show any video at boot
* PX4:
  * Update firmware from 2.7.6 to 2.7.7. This is to fix FRAM test that we use in manufacturing.