Power & Source of Big Ideas

Hello everybody, I'm just curious about the boot order of the NanoPi M4V2: If you have an emmc and a sd-card connected then the emmc is booted. Is it possible to change that order temporarily? I would like to do some experiments with the device I need to boot it from a sd-card for. I would not like ...
I don't have that board but what happens if you hold down the recovery key during boot? Assuming it's the button right next to the ethernet connector: Short story: Same as not pressing the button. Long story: EMMC is connected, operating system installed. SD-card is inserted, operating system insta...
When booting the NanoPi M4V2 a emmc has higher priority than a SD card. This is usually fine but if I want to replace the OS on the emmc the easiest way is to boot from the SD card and do the work from there. But how can I "force" the device to boot from the emmc? What works: Pull out the ...
I'm also wondering whether the extreme development of heat is an expected feature. I did not measure it but I can confirm that touching the dispenser for several seconds hurts. And there does not seem to be a difference between an idling SATA-hat without any HDD being connected and one that has (in ...