Each micro:bit has a unique five-character name assigned to it that you might see when you are using Scratch or connecting via Bluetooth. The names are hard-coded and based on their internal unique ID, so you can't manually rename the micro:bits. 

Displaying the name of the micro:bit on the LED screen


You can find out the name of your micro:bit in MakeCode by using the `device name` block.



import machine
import struct
from microbit import display

def microbit_friendly_name():
    length = 5
    letters = 5
    codebook = [
        ['z', 'v', 'g', 'p', 't'],
        ['u', 'o', 'i', 'e', 'a'],
        ['z', 'v', 'g', 'p', 't'],
        ['u', 'o', 'i', 'e', 'a'],
        ['z', 'v', 'g', 'p', 't']
    name = []

    # Derive our name from the nrf51822's unique ID
    _, n = struct.unpack("II", machine.unique_id())
    ld = 1;
    d = letters;

    for i in range(0, length):
        h = (n % d) // ld;
        n -= h;
        d *= letters;
        ld *= letters;
        name.insert(0, codebook[i][h]);

    return "".join(name);


Finding the name of the micro:bit from the pairing pattern

You can also find the name, by looking at the barcode in pairing mode:


Further information

Also see How to find the serial number of your micro:bit

The name is set in the micro:bit runtime and derived from the micro:bit's serial number, so it is individual to the device and you cannot change the name of the micro:bit. 

Further discussion can be found in this GitHub issue https://github.com/lancaster-university/microbit-dal/issues/306