Smart Lock Security

Mid-Semester PresentationOctober 10, 2013

Trey HerringtonElectrical Engineer

-Website Design -Software Implementation

Samantha Prine Electrical Engineer

-Product Research -Hardware Assembly

Jacob Ferguson Electrical Engineer -Product Research -Wireless System Design

Grant Richards Computer Engineer -Software Implementation -Data Path Design

Dr. Raymond Winton

(Faculty Advisor)

Daniel Sowards( Team Leader )

-Electrical Engineer -Wireless System Des.

Team Membe

rs

Outline- Introduction- Problem- Solution- Constraints

- Practical- Technical

- System Overview- Approach- Progress- Timeline- Q&A [1]

Problem- Electronic locks generally cost

between $70 - $400 [2].- Normal locks do not have

forced entry detection [2].- The only locks that allow

remote unlock are the more expensive versions [3][4].

- Other electronic locks do not have the ability for the user to see what phone was used to unlock the system [2].

[3]

[4]

SolutionProposed Features:- Reasonable pricing at

mid-market value, approximately $200

- Forced entry detection feature notifies the owner upon attempt

- Door entry information: Number of entries, Phone used to unlock, etc.

Practical ConstraintsSustainability : ReliabilityThe system is wired directly into the customer’s electrical system and is

therefore as reliable as the power supply. In case of power outage, the system can be powered from the backup power supply for a 24 hour period.

[5]

Practical ConstraintsHealth & SafetyThe system will notify the homeowner via SMS if a forced entry is

attempted. The user will also be able to secure area with cell phone via SMS.

[6]

Name DescriptionWirelessCommunication

The device must be able to communicate with the user via Short Message Service (SMS), allowing the user to lock/unlock and to notify the user if the door has been locked or unlocked.

Power Supply The Smart Lock Security system must be powered by a 120VAC source. A backup battery with a current range of up to 3A is required to power the device in the case of a power outage.

Alternative Communication

The device must provide an additional method of access and system configuration at the physical location of the device.

Display The LCD screen must display the correct information to the user. Some of the required information will be a menu with multiple options and further instructions based on user’s decisions.

Forced Entry Detection

The device must be able to detect unauthorized entry when the solenoid is in the lock position.

Technical Constraints

System Overview

Approach :

Forced Entry DetectionSelectionName Pros Cons

Directed Magnetic Switch

• Inexpensive $2.86• Simple data interpretation• Easy to integrate

• Visible to user• Multiple pieces

Accelerometer • Inexpensive $2.98 • Difficult to integrate• Requires more complex data

interpretation

Our Choice

Approach :

Microcontroller

SelectionName Pros ConsPIC24H • More experience

• Based on C• Already have several• Inexpensive $2.63

• Longer set up time• 21 I/O pins• No premade modules

ArduinoADK R3

• A lot of premade modules• 54 Digital I/O pins• Has its own Integrated Development

Environment (IDE)• Based of C/C++• Very little setup

• More expensive $62.99• No previous experience

Our Choice

Approach :

Wireless Communic

ationName Pros ConsGSM

Module• Compatibility with more cellphones• Requires little user setup and

maintenance• Lower dependency of external

systems

• Reoccurring service cost • Require cellular signal

Wireless Internet Module

• No reoccurring cost• Variety of uses

• Difficult user setup• A lot of potential implementation

issues• Large dependency of external

systems

Our Choice

Progress: Solenoid Lock - Testing: In progress

- Transistor: Ordered power MOSFET (Controls when solenoid locks/unlocks)

Progress: LCD Screen/Keypad- Testing: In progress

- Integrating keypad with screen

- Developing a user friendly menu

- Soon: Integrate other keypad for user to enter pin number/unlock solenoid

August September October November

Timeline

Research

Order Parts Finished Prototype

Construction & Testing

Hardware Design

Developing Code

References

[1] (2013, September 30). “Business Wire” [Online] Available: http://www.businesswire.com/news/home/20130604005681/en/CORRECTING%C2%A0and-REPLACING%C2%A0Hampton-Products-Introduces-Revolutionary-Brinks-Home[2] (2013, September 30). “Electronic Door Knobs & Handlesets” [Online] Available: http://www.lowes.com/Electronic-Door-Knobs---Handlesets/_/N-1z0wpvn/pl?cm_sp=Hardware-_-Door|M1-_-SellingTool|Electronic_Door_Hardware&cm_cr=No+Campaign-_-Web+Activity-_-Door+Hardware+TH+9.20.13-_-SC_Door+Hardware_TopHero_Area-_-10772562_1_Shop_Electronic_Hardware#!&Ns=p_product_price%7C0&page=1[3] (2013, September 30). “August” [Online] Available: www.august.com[4] (2013, September 30). “Goji” [Online] Available: www.gojiaccess.com[5] (2013, September 30). “Tax Breaks for Burglaries” [Online] Available: www.limonwhitaker.com[6] (2013, September 30). “The 2003 Northeast Blackout, 10 Years Later” [Online] Available: www.huffingtonpost.com[7] (2013, September 30). “Digi-Key Corporation” [Online] Available: http://www.digikey.com/product-detail/en/59140-1-S-02-A/HE573-ND/2650435[8] (2013, September 30). “Digi-Key Corporation” [Online] Available: http://www.digikey.com/product-detail/en/ADXL344ACCZ-RL7/ADXL344ACCZ-RL7CT-ND/3758434[9] (2013, September 30). “Microchip” [Online] Available: http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en558705#documentation[10] (2013, September 30). “Arduino Store Alpha” [Online] Available: http://store.arduino.cc/ww/index.php?main_page=product_info&cPath=11&products_id=198[11] (2013, September 30). “On the Other Hand” [Online] Available: http://jjffeducators.blogspot.com/2011/04/answers-to-open-door.html[12] (2013, September 30). “Arduino Store Alpha” [Online] Available:http://store.arduino.cc/ww/index.php?main_page=product_info&cPath=11_5&products_id=244[13] (2013, September 30). “Arduino Store Alpha” [Online] Available:http://store.arduino.cc/ww/index.php?main_page=product_info&cPath=11_5&products_id=237

Smart Lock Security

Mid-Semester PresentationOctober 3, 2013