Hi all...

I'm trying to create a new version of my management system software(for a small computer institute). Currently I'm developing some new ideas that could be implemented in this version.

So, I came up with an idea of automated user entry & exit of attendance. In simple words, a student/employer in that institute can use his id card to simply enter his presence in the institution.

After a small research, I found that RFID tags and barcode ids are those 2 solutions available for me.

But which one is more affordable(in cost) & more easy for implementation ?
Or, any other solutions other than this ?

Thanks...