I am wondering how i could set up the Rock PI 4 so that i can remotely (without physically plugging/unplugging uSD) change/upgrade the OS on the Rock PI 4. I do have the serial console.
I want to have the target OS on eMMC module, so i was hoping that i could have a setup where i also have an OS (e.g.: debian) on eMMC, but that i can set up bootstrap so that the system will normally boot from eMMC, but with interruption on console, one could boot from uSD and then use that OS to change/upgrade the OS installed on eMMC. Alas, it seems that the normal bootstrap is that uSD is preferred over eMMC.
Is there any documentation how the bootstrap process can be configured/influenced ?