Some of the documentation provided here comes from @inlart's blog: https://blog.inlart.com/post/openrgb-asus-x570/

Beginning with the AMD X470 chipset generation, Asus started using USB-based Aura controllers. On the X470 generation boards, an Aura SMBus controller drives the on-board lighting and the 12V RGB headers while an Aura USB controller drives the addressable headers. For the X570 generation, ASUS switched to a single Aura USB controller that controls on-board lighting, 12V RGB non-addressable headers, and addressable headers from a single location. The protocols of these two types of Aura USB controllers differ but have some overlap. This page documents the X570-generation Aura USB controller while the ASUS Aura Addressable Header page documents the X470-generation addressable header controller that also powers the ROG Aura Terminal.

The Aura USB controller enumerates at 0B05:18F3 and uses HID request messages for control. Messages are 65 bytes long and zero-filled.

Request Firmware String

Byte index	Value
0x00	0xEC
0x01	0x82

Firmware String Response

Byte index	Value
0x00	0xEC
0x01	0x02
0x02-0x12	Firmware string (ex. "AUTA0-S072-0101")

Request Configuration Table

Byte index	Value
0x00	0xEC
0x01	0xB0

Configuration Table Response

Byte index	Value
0x00	0xEC
0x01	0x30
0x03+	Configuration Table Data (60 bytes)

Start of update

Byte Index	Description
0x00	0xEC
0x01	0x35
0x02	0x00
0x03	0x00
0x04	0x00
0x05	0x01

Set Colors

Byte Index	Description
0x00	0xEC
0x01	0x36
0x02	0x00
0x03	0xFF
0x04	0x00
0x05+	Color data