Could you please tell me in detail how to use these files? My knowledge of Linux is very limited. Do I need to recompile a custom image suitable for myself, or how should I use these files to carry out specific operations to solve my problem? Thank you.

Yes, i know, but i think this is mostly UBoot DRAM controller parameters problem. May be someone have any suggestions about it...

Hi @djurny Just to inform you that, after cleaning out some mess I made, your overlay and armbianEnv.txt update to make the external RTC ds3231 to work, did the job. For my SBC's I use the Banana Pi M2 Zero and v25.5 rolling for Banana Pi M2 Zero running Armbian Linux 6.6.75-current-sunxi My application needs to work in the field as an Access Point with an RTC, the right date and time is important info in the diagnostics of my applications. A remark on the mentioned Armbian release: For using the GPIO pins of the SBC, python3-libgpiod works great. I use USB camera's (V4L2 camera). After any update or upgrade, my USB camera's won't work anymore. Not really a problem for me, because I'm happy as it works right now, no updates or upgrades needed. Thanks again for your great help. Met vriendelijke groet, Ed

https://github.com/armbian/build/blob/main/config/boards/retroidpocket-rp5.csc https://github.com/armbian/build/blob/main/config/boards/retroidpocket-rpmini.csc You can build images on your own. https://docs.armbian.com/User-Guide_Board-Support-Rules/#community-maintained

You need to seek support from his repo. We only can support builds from: https://github.com/armbian/build/