Custom cards and tags with Intratone

Test card with Serial Number 08:01:02:03
Comparison of 7 Byte and 4 Byte serial numbers. BCC is a checksum.
Two failed entries, with their serial numbers. Bonus question: Are these 4 Byte or 7 Byte cards?

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Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store