The Crazyflie 2.X ID is a character string of 24 characters. It is unique to each Crazyflie 2.X.

• Open the “Device manager” and find the Crazyflie 2.0/2.1.
• Right click on Crazyflie 2.0/2.1, go in “Properties” then in the tab “Details”.
• In the drop-box select “Device instance path”.

The serial number is located just after “5740\”, in the following screen it starts by 41:

By right-clicking on the string you can copy it.

Open a terminal and type (ie. cop-paste) the following command:

sudo lsusb -v -d 0483:5740 | grep iSerial

The Crazyflie serial is then displayed (here it starts by 41):

From the “About this mac” menu, click on “System reports…”

Then click on “USB”, locate the Crazyflie 2 and the serial number can be copied from there