After bricking dlink dir-842 with my last attempt, I decided to try with another one.
This time I'm stuck with command opkg install luci. It just says: opkg_install_cmd: Cannot install package luci.
Why so? It downloaded everything and signatures were ok.
I retried opkg update and opkg install luci as someone suggested doing so in a bit old thread. It did not help. So what next? I wish I could finish this before the snapshot expires and things get More awry..
As I'm not pro in doing this, is it as simple as it was when I try it for a second time?
As the instructions say that I shouldn't power-cycle the unit while doing an installation and I consider this not yet finished, wouldn't I brick the unit or get other big problems if I shut it down and start again?
No, sadly after looking it more closely, it looks like building all SDKs will take 1-2 days and packages then 2-4 days.
It is partially random: if your router's kernel & SDK gets rebuilt first, and the next packages build happends right after that, it may take just a few hours. But if your router SDK gets rebuilt last and the packages build just missed that, it can take 2+4 days or so.
Now as I'm planning to restart the project with this device, I have just one more question: As this is failed snapshot install (more specifically, luci failed to install because of the global problem), can I continue with just doing sysupgrade and then luci or what is the right starting point to fix the router? Just because I don't want to brick this one.
(You might even try opkg installing luci to your current firmware without sysupgrade. but it may fail if some package has already changed in snapshot. But the plain luci does not use kernel modules, so it might succeed.)