Before Nezha leaving the factory, we will flash a Tina Linux System.
(You can download the firmware here: https://www.aw-ol.com/downloads/resources/36)
Tina Linux is a system which customized for AIoT products by Allwinner.
And we will use this firmware to check whether the function of Nezha development board is all right.
If every function is OK, it will restart and the Blue LED twinkling.
So you can also use this .img to check whether the function is OK. If the board is normal, the blue light will also flash.
*Tips. How to flash a firmware to Nezha board: https://d1.docs.aw-ol.com/en/study/study_4compile/#flash
The red light is on after the USB is inserted, which means that the power supply is normal. And the development board only needs 5V 0.5A(~2A) power supply to start the system. Therefore, PC usb is enough.