Identify the serial number (UID) returned by a project card
Connect the reader to your computer.
I have an Ethernet reader.
To work with BALTECH tools, an Ethernet reader must be unconfigured, or required permissions must be granted in PKI Authentication and Encryption settings.
Open BALTECH ID-engine Explorer.
If you haven't installed it yet, you can download it here as part of BALTECH ToolSuite.
At the top left, click Test Sample Card.
Place the card on the reader.
The card will be displayed including its UID. The UID in decimal format is the number you're looking for.