NFC Smart Door Group 5: Daniel Fiske, Michael Lam and Daniel Tiam - - PowerPoint PPT Presentation

NFC Smart Door

Group 5: Daniel Fiske, Michael Lam and Daniel Tiam

Motivation

○ Metal key replacement ○ Smartphone integration ○ Away from home peace

• f mind

○ Lockitron, August Smart Lock, ADT Pulse Door Lock, etc.

Features Implemented

○ NFC device support ○ Web interface ○ Remote unlock ○ Monitor status ○ Track history ○ Accurate timestamps ○ Persistent data ○ Fail-Secure

Hardware Design

FPGA NiosII Avalon Switch Fabric On Chip Mem EPCS Flash CFI Flash PIO Cont GPIO Expansion Headers

SD Card Socket SD Card NFC Module Doorbell DM9000A (Ethernet) Wireless Router SPI I2C Door State Detector Elec Door Strike RTC Module I2C

Software Design

Legend: Interface

• Task
• Data
• Data Flow
• Control Events
• Door

Control Task Backup Task SD Card Lock Timeout Task NFC Task Web Server Tasks GPIO Tasks Network Interface Gpio NFC Cards Model Data History Data

NFC Overview

○ I2C & IRQ communication ○ Secure Access Module (SAM) configuration ○ Waits for an NFC tag ○ Differentiates between Mifare and 14443 cards ○ Alerts the door control task

SAM Configuration Search for Targets Parse Target Data Power Up

Target Found

Post to Control Queue Is Mifare?

Yes

Send Select APDU

No

Parse Response APDU

Host Card Emulation

○ HCE allows an Android app to emulate a card and talk to an NFC reader ○ Android phones return a random UID ○ HCE is used to return the static 8-byte Android ID

NFC Smart Door Android App

○ Android application and HCE service ○ API Level 19

○ 4.4.2 Kitkat

○ Tested on Nexus 4 and Nexus 5

Web User Interface Design

○ Browser and device independent ○ HTML5 CSS3 ○ Clean ○ Simple ○ Responsive ○ Intuitive ○ Mobile support

Future Features

○ More statistics and analytics ○ Camera with live streaming ○ HTTPS and NFC security ○ User accounts ○ Time restricted access

Demonstration

○ Live demo of the NFC Smart Door