UniqueID

Projects Programming
1

Please can someone help, I am trying to display the UniqueID of an Arduino to the LCD, but can't for the life of me remember how to make the serial number available as a constant I can call outside of the Void Setup.

Many thanks for any help,

//
// ArduinoUniqueID.ino
//
// Example shows the UniqueID on the Serial Monitor.
//

#include <ArduinoUniqueID.h>

void setup()
{
	Serial.begin(115200);
	UniqueIDdump(Serial);
	Serial.print("UniqueID: ");
	for (size_t i = 0; i < UniqueIDsize; i++)
	{
		if (UniqueID[i] < 0x10)
			Serial.print("0");
		Serial.print(UniqueID[i], HEX);
		Serial.print(" ");
	}
	Serial.println();
}

void loop()
{
  Serial.println(UniqueID);
}
2

(deleted)

3

Thank you for the reply, however I think i am still doing something wrong as the call doesn't seem to work?

//
// ArduinoUniqueID.ino
//
// Example shows the UniqueID on the Serial Monitor.
//

#include <ArduinoUniqueID.h>

void setup()
{
	Serial.begin(115200);
	UniqueIDdump(Serial);
}

void loop()
{
  Serial.println(UniqueID);
}

void showTheNumber()
{Serial.print("UniqueID: ");
  for (size_t i = 0; i < UniqueIDsize; i++)
  {
    if (UniqueID[i] < 0x10)
      Serial.print("0");
    Serial.print(UniqueID[i], HEX);
    Serial.print(" ");
  }
  Serial.println();
}
4

The GitHub example has the for loop in setup() whereas you have it in loop(). Make loop() empty by moving the for loop to setup().

5

Did you want to store the binary bytes as a string of hex characters that you can print later?

#include <ArduinoUniqueID.h>


char UniqueIDString[(UniqueIDsize * 2) + 1];


void setup()
{
  Serial.begin(115200);


  UniqueIDdump(Serial);  // Prints "UniqueID: 55 35 35 33 31 30 0D 1A 25"


  byte index = 0;
  for (size_t i = 0; i < UniqueIDsize; i++)
  {
    UniqueIDString[index++] = "0123456789ABCDEF"[UniqueID[i] >> 4];
    UniqueIDString[index++] = "0123456789ABCDEF"[UniqueID[i]  & 0x0F];
  }
  UniqueIDString[index++] = 0; // Null Terminator
}


void loop()
{
  Serial.print("UniqueID: ");
  Serial.println(UniqueIDString); // Prints: 5535353331300D1A25
  delay(5000);
}