Wireless Home Security System Project Team: Jason Fong Alex Hsiao Gavin Lee Gaurav Magoon

Introduction Why a security system? Existing security systems How our system is different

What Does Our Product Do? Detects temperature, motion and flooding Temperature display Log and view past and current events Send notification of dangerous events

Example: Alarm Triggered

Highlights of Hardware 1 Temperature sensor - I2C Protocol Motion sensor - A/D Conversion Flood - External Interrupt Sensors are placed at a distance of 4 feet from main unit

Highlights of Hardware 2 PIC16F877A Microcontroller used Crystal operates at MHz XTAL chosen for reliable RS-232 I2C operates at 100 kHz

System Overview Diagram

Hardware Overview

Highlights of Software Visual Basic - Forms and chart display Database access functionality Customizable audible alerts

Visual Basic Control Program

Database

Functionality

Firmware Block Diagram Timer module Interrupts UART Encoder/Decoder module

Packet Format Bit Message DescriptionSensor IDEvent ID10-bit Data Bit Message Description10-bit Data Message High Byte Message Low Byte

Packaging / Casing High Density Fiber (HDF) wood case Plexiglas for cover and middle plate Proto-board for mainboard

Lessons Learned Time Management Group Collaboration Resource Management

Technical Problems Faced Reception and decoding of ASCII messages on Host. Transmission from Host to PIC External Interrupt on PIC Analyzing transceiver behavior

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