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ricaun / ArduinoUniqueID

Arduino Library to gets the Manufacture Serial Number from the Atmel AVR, SAM, SAMD, STM32, and ESP Microcontroller.
MIT License
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Writable Unique ID #8

Closed TinManAkshay closed 3 years ago

TinManAkshay commented 3 years ago

Hi all,

I understand that this library is helping to read the unique ID of the MCU but I wanted to ask theoretically that we can write to the unique ID as well like to change it? Is it possible?

Please let me know.

Thanks, AKshay

ricaun commented 3 years ago

Hello @TinManAkshay

I believe is not possible to change the id of the MCU, the value is set on the manufacture of the chip and is a serial number.

If you need to create your own serial number the easiest way is use the EEPROM of the chip and set some values like a serial number.

See yaa!

TinManAkshay commented 3 years ago

Hi @ricaun ,

Thanks for the response. Are you familiar with writing anything to emulated EEPROM area of SAMD MCUs?

Thanks, Akshay

ricaun commented 3 years ago

Never try EEPROM with SAMD MCUs.

I know have some librarys for this cases.

https://github.com/arduino/ArduinoCore-samd/issues/145

See yaa