EC450 (Boston University) RFID Project

EC450 Microprocessors Project entitled "Light Switching Using RFID." Made by Sergio Shin and Javier Onglao.

The RFID tag senses the presence of passive tags via a 125 kHz activating frequency. Passive RFID tags work through magnetic induction. When they encounter radio waves at certain frequencies (125 kHz), the coiled antenna induces a magnetic field, and subsequently, generates enough power to activate the microchip in the tag. The ID-20 Reader reads in the character sequence generated by the microchip in the passive tags, and forwards it to the MSP430 Microcontroller via UART (9600 Baudrate). Since there is no hardware implementation of UART in the MSP430G2331, we had to use the Timer A Vector to do a software implementation of UART. Using the standard 8 MHz clock, we divided it to meet the 9600 Baudrate, as well as sampling at the middle of each clock cycle. The generated sequence is stored by the MSP430 in a buffer array, and compared against the programmed tag id's. When it matches one of the tags, the MSP430 goes to the appropriate state, and executes it. Finally, after a 2 second delay, the MSP430 is returned to its idle state.

Implemented on Texas Instruments MSP430 G2331. Uses ID-20 Innovations 125 kHz RFID Reader, and GDM1602K (16x2 matrix) LCD Screen.

Most of the components were bought off Sparkfun, and borrowed from the laboratory. Thanks to those who provided the components to us!

Category:

Science & Technology

Tags:

• EC450
• RFID
• Project

[starpogi]

haha yes, we prolly should.

[hsiaoer]

we should combine microprocessor projects. I made a security systems.