Hi,
modified all needed times file uEnv.txt to test all RK3328 dtb files on /dtb/rockchip folder of FAT partition to boot.
Tested again on SD alone, USB alone, and at the same time SD+USB.
Normal boot without pressing reset button.
Nothing happened, inmediately boots Android and only creates on SD or USB a folder named Android and a folder named LOST.DIR
Could i modify in any way from Android 8.1 using ADB, ConnectBot or any terminal emulator, that Android system and force boot from SD?
Original operating system of that device is Android 8.1.
Here you can see images of my device:
https://t.me/s/TempChannelForArmbian
Is it posible to use UART to modify with putty the boot sequence?
i can buy a USB Uart on Aliexpress to connect my device and give you information. Is this USB UART ok?:
FT232RL 3.3V 5V FTDI Mini USB to TTL Serial UART Adapter Module MiniUSB Port Converter+Cable for Ardu ino Pro PIC DIY
https://a.aliexpress.com/_BTs9Oo
Thanks and Regards
Jps1x2