Incoming breaking change for Asgard

[gekkekoe]

The first release after 2026-05-24.01 will contain a breaking change for Asgard.
You will need to perform factory flash once with one of the pre-releases (or next release). Get the latest (pre) release here: https://github.com/gekkekoe/esphome-ecodan-hp/releases

Here are the instructions from the release notes:

⚠️ Asgard breaking change ⚠️

Starting with this release, stand alone web UI and Odin data will be persisted on a separate partition. This requires a new partition table on your Asgard installation. Please use this guide to perform an one time factory flash over USB. You need to do this once and for the next update, you can use the regular OTA. The history will not work if this is not performed. This procedure is only relevant for Asgard installs. Please note that the first boot after the factory flash will take a bit longer as the new partition needs to be 'formatted'.

If you ignore this and apply the OTA, the new stand alone history (7 days instead of 1, long Odin history) will not work. Asgard will complain with a message like this:

[12:19:02.282][E][asgard_lfs:144]: Partition 'history' NOT FOUND in partition table!
[12:19:02.284][E][asgard_lfs:145]: LFS is disabled. Please flash the device via USB to update the partition table.

If you are compiling from source, you can follow this guide if you don't want to unplug the unit

If you did it correctly, first boot should show:

[12:28:45.088][I][asgard_dashboard:048]: Setting up Ecodan Dashboard on /dashboard
[12:28:45.101][W][asgard_lfs:095]: LFS: /lfs/history_mins.bin missing or stale — (re)creating
[12:28:46.923][W][asgard_lfs:095]: LFS: /lfs/history_hour.bin missing or stale — (re)creating

After this one time upgrade, you can apply the regular OTA again for next releases.