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ENSC 440 Capstone Project Spring 2010. Wirelessly Networked Faucet and Showerhead System. Sonca Teng , Michael Hou , Kwang -young Lee, Aaron Marcano. Outline. Who We Are Motivation Project Overview Hardware Software Budget & Timeline Future Development Business Plan. Outline.

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slide1

ENSC 440 Capstone Project Spring 2010

Wirelessly Networked Faucet and Showerhead System

SoncaTeng, Michael Hou, Kwang-young Lee, Aaron Marcano

outline
Outline

Who We Are

Motivation

Project Overview

Hardware

Software

Budget & Timeline

Future Development

Business Plan

outline1
Outline

Who We Are

Motivation

Project Overview

Hardware

Software

Budget & Timeline

Future Development

Business Plan

who we are
Who We Are

The Team:

CEO : SoncaTeng

Project Lead | Electronics Design | Wireless Development

COO: Michael Hou

Software Integration | Mechanical Design | Solidworks Modeler

CFO : Kwang-young Lee

Finance Manager | Software Lead | LCD and Flow Sensor Programming

CTO : Aaron Marcano

Systems Integration | Lead Wireless System Developer | Team Motivator

outline2
Outline

Who We Are

Motivation

Project Overview

Hardware

Software

Budget & Timeline

Future Development

Business Plan

motivation
Motivation

Currently in California there are mandatory water restrictions because voluntary conservation efforts have proved insufficient

“no restaurant [..] shall serve drinking water to any person unless expressly requested.”

City of Los Angeles Emergency Water Conservation Plan Effective 8-11-09

microflow system overview
Microflow System Overview
  • Water is a scarce resource, whether people choose to act accordingly or not
  • We choose to do something about this
  • Help people see how much water they waste on a day to day basis by putting the information in front of them
  • Guide people toward responsible water usage with our solution
microflow system overview1
Microflow System Overview
  • Two emerging groups in this world
    • In areas where there is a genuine shortage of water and there is a need for personal usage monitoring
    • In areas where people are socially inclined to be (or appear to be) environmentally consciencious
  • With our proposed solution, we cater to both groups
    • We will now demonstrate how
existing solution
Existing Solution
  • Right now what you can do is run outside and look at your water meter
    • Difficult to read a water meter
    • Very inconvenient and most would not bother
    • Is not viewable in real-time
    • Combines all water usage, including that which is not under your control
      • Ie. Usage of washing machine, flushing toilets, etc
the microflow solution
The Microflow Solution
  • The Microflow Solution
    • A wirelessly linked system of faucets and showerheads around the household
    • Microflow faucets and showerheads are drop-in replacements to be purchased right off the shelf next to existing units at Home Depot or Rona
    • Single unit will show you water usage in real time
    • More than one unit: will wirelessly link and show a network total in addition
outline3
Outline

Who We Are

Motivation

Project Overview

Hardware

Software

Budget & Timeline

Future Development

Business Plan

outline4
Outline

Who We Are

Motivation

Project Overview

Hardware

Software

Budget & Timeline

Future Development

Business Plans

faucet
Faucet

Start with generic Home Depot faucet as base

Watertight LCD enclosure

In-line flow sensor

Controller / transceiver enclosure

microcontroller
Microcontroller
  • Control All Other Components
  • Low Power Consumption
  • Easy to Program and Use
  • CHEAP!
microcontroller1

RESET OR START-UP

INITIALIZATION

DISPLAY LCD

CURRENT VALUE

INTERRUPT

FLOW SENSOR

N

NETWORK VALUE AVAILABLE?

INTERRUPT

TRANSCEIVER

DISPLAY LCD

NETWORK VALUE

Y

Microcontroller
  • Control LCD Module (I/O)
  • Receive Input from Flow Sensor (Interrupt0)
  • Control Wireless Transceiver (SPI)
lcd display
LCD Display
  • 2 x 16 Character Display
  • Controlled by the Microcontroller (4-bit)
  • Controllable LED Backlight
user interface
User Interface
  • During Water Usage
  • After 10 Second Delay
  • Also Programmable for American Market:Fluid OZ, Gallon Display
sub parts flow sensor
Sub parts –Flow Sensor
  • Hall-effect Sensor Attached to Turbine In Stream
  • Limited Flow Range
  • Fixed Number of Pulses Per Liter (or Gallon)
  • N=2200 Pulses/Liter (8300 Pulses/Gallon)
sub parts transceiver
Sub parts – Transceiver
  • Wireless Transceiver
    • MiWi™
    • Zigbee™
  • Connected to Microcontroller via SPI
outline5
Outline

Who We Are

Motivation

Project Overview

Hardware

Software

Budget & Timeline

Future Development

Business Plans

software
Software
  • Initialization
    • LCD
    • Transceiver
    • Flow Sensor
  • Transceiver Mode
transmission format
Transmission Format
  • Source Address – Used to Identify Node
  • Payload
    • Format
      • Water Usage Data
      • TimeStamp
      • CheckSum
transmission format1
Transmission Format
  • Message Received
  • Calculate and Verify Checksum
  • After Checksum, Check Format
  • After Format, Check Received Water Usage Data
  • If Same as Old, Ignore. If New, Update.
potential network problems
Potential Network Problems
  • Lost Power, and Reset
    • Transceiver Will Reconnect to Network
  • Receiving Node Out of Range
    • Indirect Messaging as Potential Solution
  • Receiving Bad or Incorrect Messages
    • Check Consistency of Data and Ignore If Bad
potential network improvements
Potential Network Improvements
  • Enhanced Network Security
    • Encoded Message Using CRC and Encryption
  • Increased Range
    • Device Hopping.
further applications
Further Applications
  • Cooking
  • Gardening, Lawn Watering
  • Industrial Use, Leak Detection, Municipal Monitoring
  • Suite management for Landlords
outline6
Outline

Who We Are

Motivation

Project Overview

Hardware

Software

Budget & Timeline

Future Development

Business Plan

cost summary
Cost Summary
  • Total:
    • $876.56
      • $50 Over-Run
      • Shipping
      • Failed Devices and Their Replacements
      • Network Analyzer
      • Extra Showerhead Design and Implementation
external funding
External Funding
  • ESSEF Funding
    • Presented Idea To ESSS Execs
    • Received $400. Used to Order More Parts
  • Witen Fund?
    • Provide Additional Funding for the Project
    • Apply After the Project is Complete
outline7
Outline

Who We Are

Motivation

Project Overview

Hardware

Software

Budget & Timeline

Future Development

Business Plan

future work
Future Work
  • Custom flow sensors (high flow / high accuracy)
  • Memory chip to store daily / weekly / monthly usage
  • Flow management software
future work1
Future Work
  • Use of switching regulators vs linear regulators currently in use
    • 90% efficient vs 50%
      • Reliability (heat generation)
      • Halved battery power consumption
      • Battery use efficiency with step-up voltage regulators
  • Further revisions to software to support shutting off LCD backlight, and putting PIC controller and wireless transceivers into sleep mode
outline8
Outline

Who We Are

Motivation

Project Overview

Hardware

Software

Budget & Timeline

Future Development

Business Plan

business plan
Business Plan
  • Immediately apply for provisional patent
  • Conduct extensive market research
  • Present at trade shows
  • Speak to building developers, see what features are in demand
    • See if they would like to install these for demonstration run
  • Contact retail chains such as Costco and Home Depot to gauge demand
  • Speak to incumbents, attempt to negotiate IP / manufacturing agreement
what we learned
What we learned!
  • Communication is key
  • Ask questions
  • Talk to component manufacturers, they give great advice and sometimes they give things for free
  • Plan for the worst, because things won’t go as planned
    • Suppliers may let you down (Ie PCB manufacturer), must have backup plans
conclusion
Conclusion

The Verdict….