Jetson nano developer kit by WayPonDev - boot from SD card possible?

Dear fellow jetson nano enthusiasts,

I got a Jetson nano developer kit from Amazon and it is branded as WayPonDev. There is little instructions in the package but it provided the website for youyeetoo.com which is how I got here. I played with it for a couple of weeks and I like it. I would recommend it to others if one problem can be resolved, that is, how to boot from SD card, because it comes with a 16Gb eMMC and boots into it by default.

I followed the instructions at wiki.youyeetoo.com, the Firmware update section described how to boot from SD card. I followed the instructions closely, and modified the “extlinux.conf” like this below:

TIMEOUT 30
DEFAULT sd # set the default boot device.

MENU TITLE L4T boot options
#emmc
LABEL primary
MENU LABEL emmc kernel
LINUX /boot/Image
INITRD /boot/initrd
APPEND ${cbootargs} quiet root=/dev/mmcblk0p1 rw rootwait rootfstype=ext4 console=ttyS0,115200n8 console=tty0 fbcon=map:0 net.ifnames=0 sdhci_tegra.en_boot_part_access=1

#sd
LABEL sd
MENU LABEL sd kernel
LINUX /boot/Image
INITRD /boot/initrd
APPEND ${cbootargs} quiet root=/dev/mmcblk1p1 rw rootwait rootfstype=ext4 console=ttyS0,115200n8 console=tty0 fbcon=map:0 net.ifnames=0 sdhci_tegra.en_boot_part_access=1

However, when I rebooted, it still boots into mmcblk0p1 instead of mmcblk1p1. My questions are:

  1. Does anyone know whether this particular Jetson Nano by WayPonDev can boot into SD card instead of the onboard eMMC?
  2. If this is possible, what else do I need to do in addition to following the instructions?
  3. Has anyone used the UART to switch the boot? Any instructions?

Thanks and have a great day!

-Chang

Never mind. I found a way to boot into SD card by selecting it from the USB-TTL serial port. Now it works.