Question related to QR code

Hi guys I recently wanted to start a project that dealt with having a central P.O. Box system (of around 30 boxes ) that would be accessed through the same QR code sensor. I was wondering , how would it be possibly to allow the QR sensor to open a particular box ? Can anybody provide me with some assistance ? Thanks in advance

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Original article: Question related to QR code
Author: /u/An0n_666_666