Get unique identification value of Arduino Uno controller from C# desktop applic


I’m trying to figure out, what and how can get as unique identification number or any other kind of ID equivalent from particular Arduino Uno micro-controller from C# desktop application with serial port data

In case of Uno, I have COM3 open:

    myport.PortName = comPort;
    myport.BaudRate = 9600;

But I’m not sure, how to read such data as ID of chip, for example with EEPROM Get :

    #include <EEPROM.h>
    void setup() {
      float f = 0.00f; 
      int eeAddress = 0; 
      while (!Serial) { 
      Serial.print("Read float from EEPROM: ");
      EEPROM.get(eeAddress, f);
      Serial.println(f, 3);    
      secondTest(); //Run the next test.
    struct MyObject {
      float field1;
      byte field2;
      char name[10];
    void secondTest() {
      int eeAddress = sizeof(float); 
      MyObject customVar; 
      EEPROM.get(eeAddress, customVar);
      Serial.println("Read custom object from EEPROM: ");
    void loop() {}

and C#:

    private void button1_Click(object sender, EventArgs e)
        textBox1.Text = myport.ReadExisting();

I get some completely misunderstood result:

** Read float from EEPROM: ovf**
** Read custom object from EEPROM:**
** ovf**
** 95**
** _^^]]]\\fedc**

What must be the output variable to get unique id from particular micro-controller:


I am totally not sure what is your question (English is not your 1st language is it ?) but you want to store a unique ID in the Eeprom and then read it later, maybe .. well you'll need to store the values first, they don't store themselves you know. If you don't put(), you'll get() whatever there was already. If you .print(float) to the serial port it will print the binary representation. Same with the other variables.