how do I change serial number?

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AkosLukacs

Altho you didn't say which device you have, but I think it returns the MAC of the device in all cases.
Question is: what do you want to accomplish. You can use for example storage to save configuration like a shorter device name in flash. And read that in the onInit().

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user109783 in reply to @AkosLukacs

I have a STM32F4DISCOVERY board. Yes, I want to have a unique identity whick like MAC ADDRESS in the board, but I don't want to define it in code. I see process.env.SERIAL is a good position to store.
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user109783 in reply to @AkosLukacs

Thank you, your suggestion is good for me.

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