https://forum.armbian.com/topic/7385-firefly-rk3399-support-efforts-potential-csc-board https://forum.armbian.com/topic/7498-nanopc-t4/ UART is accessible on a standard connector but with unusual speed: 1500000 If you want to boot from your SD card you need to hold boot button while powering up/resetting Enable video and 3D acceleration
You need to hold boot key and power/reset the device to force boot from SD card, Shutdown doesn’t work properly. It reboots the board. Devices, which memory number begins with SEC710 K4B4G16, need to do.: https://forum.armbian.com/topic/7274-nanopc-t3-boot-troubles/page/3/?tab=comments#comment-83688
second serial console is enabled on a microUSB port occasional troubles with network driver https://forum.armbian.com/topic/7260-quick-review-of-nanopi-fire3/
Shutdown doesn’t work properly. It reboots the board.
Onboard wireless module (XR819) has poor software support so wireless connection issues are expected Hardware issues which manifest in stuck on reboot/power off on some boards (fix) Serial console is enabled by default on µUSB