S14: Hyperintelligent NFC Locker of the Future

Grading Criteria

• How well is Software & Hardware Design described?
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• Code Quality
• Overall Report Quality:
  • Software Block Diagrams
  • Hardware Block Diagrams

    Schematic Quality

  • Quality of technical challenges and solutions adopted.

Abstract

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The team's idea behind the Hyperintelligent NFC Locker of the Future was to reinvent the currently outdated system of rental lockers. Current rental lockers require a user to input money to release a key and lock the locker. Then, when the user is done with the locker, they use the key to unlock the locker and the key is now stuck there for the next user. The Hyperintelligent NFC Locker of the Future is modernizing this process by using NFC technology from a user's smartphone as the "key".

Objectives & Introduction

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Objectives

The objectives of the Hyperintelligent NFC Locker of the Future include:

Introduction

A user of the Hyperintelligent NFC Locker of the Future will walk up to a locker not being used and request a key by placing his/her phone on the NFC module. The key will save to the phone application. After receiving the key, the user can now lock the locker by issuing a lock command with the phone application and saved key. After unlocking the locker, the key will now be erased so the user can't use the lock again unless they go through the process again.

Team Members & Responsibilities

• Devin Villarosa
  • Driver Development, Project Manager
• Hien Nguyen
  • Locker Construction, Mobile Application Development
• Gregory Pace
  • FreeRTOS Software Design, Networking

Schedule

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Week#	Task	Projected Completion Date	Actual Completion Date	Status	Notes
1	Order Parts	3/21	3/21	Completed	Some changes to the designs were made and extra parts were ordered after the initial date.
2	NFC Module	3/28		Incomplete	Documentation was limited and getting started on the code was difficult
3	Locker Application	4/4	4/18	Completed	Constructing the locker was fairly quick and simple. However, figuring out how to attach our locking mechanism and place our components in the box took longer than expected.
4	Android Smartphone Application	4/11		Incomplete	A lot of documentation on NFC applications is provided by Android.
5	Communication Between Phone and Locker	4/18		Incomplete
6	Implementing a Two Locker System	4/25		Incomplete	Actual completion date was pushed back to do difficulties of finishing the NFC module component.
7	Reserved to Catch Up	5/2		Incomplete	Used time to figure out how to get NFC module to work.
8	Reserved to Catch Up	5/9		Incomplete	Finalized NFC module and multiple locker system.
9	Final Tests and Aesthetics	5/16		Incomplete

Parts List & Cost

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Bill of Materials

	Quantity	Part	Price Per Unit
1	(3)	SJ One Board	$80
2	(1)	1 in. x 12 in. x 8 ft. Select Pine Board	$33.46
3	(2)	ITEAD PN532 NFC MODULE	$17.00
4	(2)	Universal Heavy Duty Power Door Lock Actuator Motor 2 Wire 12V	$5.13
5	(2)	Leegoal L298N Stepper Motor Driver Controller Board Module	$7.50
6	(2)	ENC28J60 Ethernet LAN Network Module For 51 AVR STM32 LPC	$7.31
7	(1)	TRENDnet 5-Port Unmanaged 10/100 Mbps GREENnet Ethernet Desktop Plastic Housing Switch, TE100-S5	$9.99
8	(1)	Logisys 480W 240-Pin Dual Fan 20+4 ATX Power Supply PS480D2	$13.99

Design & Implementation

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Hardware Design

As shown above, the NFC locker system is composed of three uC: Two masters and one shared slave. The two masters drive their independent actuator subsystem, independent NFC module subsystem, and shares the slave.

The masters pull data from its NFC subsystem, and sends the data to the slave. The slave will either accept or reject the password. If the password is verified, the slave will then send information to the master, where the actuator subsystem will either lock or unlock the locker.

Power System Design

System Powering Table

	Submodule	Voltage Needed	Voltage Supplier
1	SJOne Board	+5V	ATX Power Supply
2	NFC Module	+3.3V	SJOne Board
3	Actuator Submodule	+12V	ATX Power Supply

The system ranges in using three different voltages: +12V, +5V, and +3.3V. Because these voltages are standard in computer systems, the team used an ATX power supply. The ATX power supply has a +12V, +5V, and a +3.3V output.

All ATX power supplies has a "safe power-up" feature in which the power supply will not turn on. In order to turn on the ATX power supply, the P.ON wire must be shorted to ground.

Hardware Interface

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Software Design

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Logical Flow of System's Software

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Implementation

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Testing & Technical Challenges

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My Issue #1

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Conclusion

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Project Video

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Project Source Code

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References

Acknowledgement

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We would like to acknowledge Preetpal Kang and Dr. Haluk Özemek for giving us strength.

References Used

List any references used in project.

1. LPC176x/5x User Manual
2. PN532 User Manual
3. ENC28J60 Data Sheet
4. Android Developers Near Field Communication API