NanoPi R2S Plus - OpenWrt Installation Issue on eMMC

Hi,

I'm looking for information regarding the NanoPi R2S Plus. I've tried installing vanilla OpenWrt on it, but from what I've found, OpenWrt currently does not support writing the image to the eMMC.

When attempting to boot, U-Boot returns the following errors:

U-Boot TPL 2021.07-OpenWrt-r24012-d8dd03c46f (Jul 15 2024 - 22:14:18)
DDR4, 333MHz
BW=32 Col=10 Bk=4 BG=2 CS0 Row=15 CS=1 Die BW=16 Size=1024MB
Trying to boot from BOOTROM
Returning to boot ROM...

U-Boot SPL 2021.07-OpenWrt-r24012-d8dd03c46f (Jul 15 2024 - 22:14:18 +0000)
Trying to boot from MMC1
Card did not respond to voltage select! : -110
spl: mmc init failed with error: -95
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###

What steps need to be taken to fix this issue? Can anyone point me in the right direction?

Thanks in advance!