Microcontroller-based Doorlock System Using GSM Sim as Smart Card ID

Way back 2006, Mr. Franz Leonard Cadiz Revuelta, a BS Applied Physics student, developed a door-lock system wherein a GSM Sim was used as user identification or as access control. With respect to the widespread use of smart card technology and its many more potential application, he proposed such concept because of the GSM Sim's cheapness (even expired GSM Sims can be used) and its potential application here in our country.

The microcontroller-based door-lock system using smart card id was developed using:

• Designing the apparatus - GSM Sim interface device, user interface, power supply, locking mechanism, and door control circuit.
• Development of the software for the lock system - Data transfer to/from the GSM Sim, administrator and user code authentication, locking mechanism, open-close door detection and motor operation.

Upon reading the thesis, I focused more on the section explaining the door-lock system software and the code used (which can be seen on the appendix), points to remember:

• Menu Diagram:

• Developed in ImageCraft C Compiler IDE version 6.31 and AVR Studio version 4.0

Other notes:

• "Some bar-coded id's can easily be photocopied and scratched off. It cannot store data" (Revuelta, 2006).
• "Magnetic stripe cards are prone to errors due to exposure to magnetic field. It cannot store data and has limited functions" (Revuelta, 2006).
• Used asynchronous half-duplex data transfer.

References:

Revuelta, F.L.C. (2006). Microcontroller-based doorlock system using GSM sim as smart card id. BS Thesis. University of the Philippines, Los Banos, Laguna.