How to determine if the firmware has been successfully updated(Reference Video:https://youtu.be/8oRuCusCyUM )
Inserting the TF card and powering on, firmware update interface will pop up. Once the upgrade progress (percentage) is completed, it will show Update Successful on screen.
After inserting the SD card with the motherboard firmware, the boot blue screen display takes longer than normal startup; if the update fails, it is recommended to rename the firmware like 123.bin and update repeatedly/change cards and then update the firmware again.