ArduinoUniqueID

This Library gets the Unique Serial ID from the AVR Microcontroller.

Unique Serial ID - Hidden Serial Number

The datasheet of the Atmega328pb chip has a section 'Serial Number' how explain every chip have a unique device ID with 10 bytes.

The datasheet of the Atmega328p chip does not say anything about the serial number, but I tested using the same Z-pointer Address on the datasheet of the Atmega328pb.

Apparently, the chip Atmega328p have a hidden serial number with 9 bytes, and others AVR Microcontroller maybe too, like the table below.

Z-pointer Address	Atmega328pb	Atmega328p
0x000E	Byte 0	Byte 0
0x000F	Byte 1	Byte 1
0x0010	Byte 2	Byte 2
0x0011	Byte 3	Byte 3
0x0012	Byte 4	Byte 4
0x0013	Byte 5	Byte 5
0x0014	Byte 6	-
0x0015	Byte 7	Byte 6
0x0016	Byte 8	Byte 7
0x0017	Byte 9	Byte 8

Dependencies

This library only works on AVR Microcontroller.

Tested Microcontroller

• Atmega328pb - 10 bytes
• Atmega328p - 9 bytes
• Atmega2560 - 9 bytes
• Attiny85 - 9 bytes

Installation

• Install the library by Using the Library Manager
• OR by Importing the .zip library using either the master or one of the releases ZIP files.

Examples

The library comes with examples. After installing the library you need to restart the Arduino IDE before they can be found under File > Examples > ArduinoUniqueID.

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Reference

Include Library

#include <ArduinoUniqueID.h>

Variable: UniqueID & UniqueIDsize

UniqueID has UniqueIDsize bytes array of the Unique Serial ID.

for(size_t i = 0; i < UniqueIDsize; i++)
  Serial.println(UniqueID[i], HEX);

Method: UniqueIDdump

Print the hexadecimal bytes of the Unique Serial ID on the Stream.

void UniqueIDdump(Stream);

Variable: UniqueID8

UniqueID8 has the last 8 bytes array of the Unique Serial ID.

for(size_t i = 0; i < 8; i++)
  Serial.println(UniqueID8[i], HEX);

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