1. Smart Attendance System
Team Leader: Caleb Simmons
Team Members: Ryan Jewell, Max Kolomiyets, Robert Longfield

2. Objective Improve the way entities do business
Provide accurate attendance data for businesses to cater to their customers needs

3. System Architecture RFID readers set up at doorways to record traffic
Client Computer installed for a classroom to handle the sign in
Server that holds all of the data and handles some of the processing load
Web based utility to manage and view the data

5. Database Design Relational Table Database Microsoft SQL Server
Network Database (Allows connections on the network)
Some stored procedures to handle some of the “heavy-duty” computations

7. Management Utility Web Based
Allows Students to view attendance history
Allows professors to view attendance to see which students consistently miss or certain days of the week that consistently have low attendance
Admins will be able to add classes and users
Admins will also be able to view the aggregate data
Students can request a manual override from a professor if missing ID card

8. Management Utility Sample

9. Client Python Application
Set up at each classroom to handle the traffic of the users
Uses information in the database to decide how to handle the traffic
Intermediary between RFID reader and Server
We used a Raspberry Pi 3b as our client for our prototype

10. RFID Reader Ideally RFID Reader would have a range of about 1m
Longer range readers are too expensive (~$250)
We decided to use the MFRC522 for our project because of our limited budget (~$5)
Range is only about 5cm so we need a solution...

11. Augmented Antenna
-Objective is to extend the range of the reader to encompass an average doorway
-Maximize convenience
-Stay within FCC regulations
-30uV at 30 meters

12. Antenna Initial Calculations
-Frequency Matching
-Found Inductance leads us to to the corresponding capacitance

13. Antenna Initial Calculations
Discuss Pinout of chip, TX1, TX2, RX. Resonant Frequency

14. Antenna Initial Testing
-Able to replace existing antenna with small wire loop.
-Door sized loop unable to read tags.
-Matching resonant frequency of antenna insufficient. Too much interference.
Discuss nice sine wave of standard reader, current going through small loop, interference mhz, unsuccessful reads.

15. Antenna Calculations Take Two
-Complete Redesign of circuit
-Add filtering network to reduce interference.
-Match antenna to 13.56MHz
-Prevent RX pin from being overloaded.
Discuss going through guides to redo circuit.

16. Antenna Testing Take Two
-Obtained Steadier Waveform
-Still unable to read cards.

17. Why Didn’t it Work? -Unknown layout of receiving circuitry.
-Constant amplitude changes in waveform.
-Not perfect filtration
-Overloaded RX pin
-Tag unable to influence antenna sufficiently.
Did we miss any other reasons?

18. Budget -Budget was kept low due to member contributions
-Special thanks to EECS Dept. for access to testing facilities.
Item
Cost
Raspberry Pi
$0 (Provided), MSRP $50
MFRC522 RFID Reader x3
$21.71 (~7$ Each)
Wiring, Component Kit
$12.80
Soldering Iron & Solder
$0 (Provided), MSRP $20
24 awg Wire
$0 (Provided), MSRP $0.10/ft.
Lumber for Door Mockup
TBA
Datacenter Server
$0 (Provided)
Total:
$34.51………...$ MSRP

19. Marketing Requirements
Low cost overall
Low power consumption
Easy integration
User Friendly

20. Engineering Requirements
1 Meter Range RFID Reader
Client Side Hardware
Customer needs some sort of educated staff
RFID tags durability
Computer with a web browser
Network (Ethernet cables, switches, etc.)

21. Limitations
Circumvention
Number of entrances
RFID Reader

22. Questions?