Hi,
I've installed OpenWRT on Archer C7 yesterday, it took time to understand I need the factory file for the IL version and not the EU version, although on the sticker it is mentioned C7(EU) v2.0.
Now I have installed version 19.7.10 but having issues with 5Ghz wireless - it is always disconnected after couple of minutes and the interface / SSID is disabled.
I thought upgrading it to 24.10.0 but I'm not sure if I can use the ath79 sysupgrade.
Is it possible to run ath79 versions on C7 IL v2.0?
Is the hardware same in IL and EU and only the stock firmware is different?
Otherwise you can use the sysupgrade process but it is multi-step:
you need to upgrade to 19.07 ath79
then to 23.05
and finally to 24.10.
Regardless of the method you use, you cannot keep your configuration. Do not keep settings (only relevant for the sysupgrade method), and do not attempt to restore from a backup.
You will configure from scratch, but you can always use a backup as a human readable reference.
AFAIK only the hardware ID differs - and what the OEM firmware does with it. So in terms of documentation, everything written for the normal c7-v2 applies, apart from the dedicated images.