I wasn't sure what section to put this question in cos it deals with software, hardware and databases but here goes.
I am doing a final year project in college. The project is a security system in which a database will control the access rights of individuals. The project involves reading an 64-bit number from what is called an ibutton ( www.ibutton.com
). Each person will have there own ibutton with a unique number. The number will be read by an 8051 microprocessor and stored. I then have to send the number to a computer to verify that the number is in the database to check if the person has access rights. I am just a bit confused about this part. Should i use an ethernet connection or an RS232 to communicate with the microcontroller. If so how would i set it up that access is automatically executed when the computer recieves a number from the microcontroller, that the number is passed in to access and that a signal is sent back to the microprocessor to open the door. It's just all a bit confusing for me and i don't even know where to start so any help would be appreciated.