Hello,
I built AIO-3568J_Buildroot_v1.3.2a_230226.img with default settings.
I loaded this img to uSD using command dd.
But when I'm trying loading system, nothing happened
It sounds like the machine may not be booting up correctly for a few different reasons. You can attempt the following troubleshooting steps:
Use the dd command to confirm that the image file was successfully written to the uSD card. Verify that the write operation was successful and that the uSD card's device was the one you requested.
Make that the gadget is switched on and that the uSD card is properly placed into it.
Verify whether your device needs any special configurations or boot settings in order to boot from the uSD card. For some devices to boot from an external source, particular boot flags or configurations can be required.