Tinker OS 3.0.11 : Serial Number ?

[Remontoir 0]

We made disk-images of a modified TinkerOS for mass deployement. This is for a Tinkerboard S R2.0.

I need the serial-number to identify the device. I read 

/sys/firmware/devicetree/base/serial-number

The problem is that I got the exact same serial for a duplicated image on another device !
Also it's not the same as the one on the product box.

How can I get the "real" serial using TinkerOS 3.0.11, ideally the serial which is on the box sticker ?

 

[Remontoir 0]

Well, the answer is :

https://github.com/TinkerBoard/TinkerBoard/wiki/Developer-Guide#how-to-get-the-sn

Not the same number which is on the box's sticker but it will do.

 

[Remontoir 0]

Note: I've been told the above is not the serial number but the PPID (Piece Part Identification).
 

The file /sys/firmware/devicetree/base/chosen/bootargs shows (uboot args) :

sdwupdate storagemedia=sd androidboot.storagemedia=sd  (...) androidboot.serialno=c3d9b8674f4b94f6

The serial number in the boot arguments is the same than the one in /sys/firmware/devicetree/base/serial-number

Question : where does this  "serial number" comes from ? In the uboot code as a default value ?

 

[denchakapon 5]

On 8/1/2022 at 4:16 PM, Remontoir said:

Question : where does this  "serial number" comes from ? In the uboot code as a default value ?

 

This serial number is generated by u-boot based on CPU ID. So this serial number is the same for devices with the same CPU model.

[Tinker Board 2]

PPID is not from CPU ID.

PPID is ASUS's device ID on the production control line, which can also be used for customer service as S/N, and is a unique value.