1. Adaptive Thermostat Using Bluetooth Trey Lawrence Jennifer Ogunlowo Scott Snyder Mark Youngblood ECE4007L02, Group 7 Georgia Institute of Technology

2. Project Overview Thermostat equipped with Bluetooth senses presence of users’ cell phones, receives unique id, sets associated temp. preference Consumers desiring home automation, energy savings Price lower than current high-end models

3. Design Objectives Detect cell phones at up to 100m Handle up to 4 users at once using weighted averages Utilize modern thermostat temperature control algorithms Comply with Energystar standards

4. System Description

5. Microcontroller Schematic

7. Interface to HVAC Unit

8. Bluetooth Control

9. Temperature Control

10. Menu Control

11. Design Analysis Bluetooth Class 1 radio modem –Connections established automatically –Range of 100m –Low power MSP430 microcontroller –Adequate program/data storage –Low power

12. Design Analysis Digital temperature sensor –SPI-compatible –.5°C accuracy Development board –84x48 pixel LCD display –JTAG connector for easy programming –Joystick with 4 directions, select

13. Marketing and Cost Development CostsProduction Costs Total Cost for N units 4 Engineer’s Salary (57 Hours) $6532.30 Overhead (Electricity, Building) $500,000.00 Parts N * $153.96 Assembly & Testing N * $20.00 Total $506,532.30TotalN * 173.96 $506,532.30 + (N * $173.96) Current thermostat options include Mechanical, Digital, & Wireless. No product was found that contains the features and specifications proposed in this project The market for Heating, Ventilation, and Air Conditioning (HVAC) units has grown 24% over the last 19 years.

14. Projected Schedule 10/26/07 – Order HVAC interface parts 11/05/07 – Finish code segments, integrate –Bluetooth control –Temperature management –Menu system using LCD + joystick 11/12/07 – Add HVAC functionality 12/05/07 – Final demonstration

15. Future Work Investigate alternatives to Bluetooth Develop stand-alone wireless controller Formulate smarter HVAC control algorithms

16. “To design the future effectively, you must first let go of your past.” Questions? -Charles J. Givens