thanks a lot, that will be a big help, another question sir denbo, if i added GSM to send sms to the parent of the owner of the tag, how will it be interfaced?
because that is the overview of my projects, it is a student entrance security and monitoring system, once a student palce his id tag near the reader, the turnstile will open and also sends sms to his parent, the contact no, probably stored in the database, which i ddnt know yet, thanks for helping