Smart Lighting System Final Presentation Bradley University - - PowerPoint PPT Presentation

Smart Lighting System Final Presentation

Bradley University Department of Electrical and Computer Engineering Authors: Alexander Berian, Dustin McCart Project Advisor: Aleksander Malinowski Date: 3/21/2016

Overview

• Background
• Work Completed

○

Alex Berian

○

Dustin McCart

2

Background

3

• Smart Light Systems
• Smart Light Switch
• Specifications

Modern Smart Lighting Systems

4

• Pricey
• Complicating
• Bulb + more

Screebshot of Google

Smart Light Switch

5

• We Make The Switch

○ Not the bulb

• Building/Home Automation
• Save Energy
• Smart Phones
• Light Usage Pattern Prediction
• Preset Events

Requirements and Constraints

6

Glass Box Diagram

7

Alex Berian

• Light Control Circuit
• User Interface
• Android Application
• System

Communication

8

Light Control Circuit

9

Relay Drive Circuit

• Relay Switch
• Transistor
• Flyback Diode
• Raspberry Pi 5V
• Raspberry Pi
• utput Pin

10

Light Control Circuit

11

Light Control Circuit Testing

12

• Safety
• Lamp
• Old and unused

Raspberry Pi

• Button

Motion Sensor

13

Motion Sensor

14

• Motion Detected

○ 3.3V out ○ 6 seconds

• No Motion Detected

○ 0V out

User Interface Circuit

15

User Interface Circuit

16

• Bluetooth Toggle
• Motion Sensor Toggle
• Light Switch
• Mode Selection
• Indicator LED

○ Bluetooth ○ Motion Sensor ○ Mode

User Interface Circuit Testing

17

• Simple input & output program

Android Application

18

Android Application

19

• Android Studio
• Commands over Bluetooth
• Syncs to system status
• Wifi setup

○ Date and Time

System Communication

20

System Communication

21

• Raspbian
• Pipes
• C++

○ Control Hardware ○ Prediction Algorithm ○ Data Storage

• Python

○ Bluetooth

■ Reconnection issue ■ ~$ sdptool add sp

○ Wifi setup

Dustin McCart

• 22

Schedule

Task Planned start Completion Date Status Basic Programming 9/15/2015 9/22/2015 Complete Pin Setup 9/24/2015 10/20/2015 Complete Prediction Algorithm 10/22/2015 11/17/2015 Complete Data storage 1st and 2nd log 11/19/2015 12/8/2015 Complete Data storage 3rd log added later Unknown 65% Mode Programming 1/21/2016 Unknown 40% Communication Between programs added later 3/8/2016 Complete Merging Programs 2/11/2016 Unknown 30%

23

8 INPUTS

• 3 Switches

○ Light switch ○ Bluetooth toggle ○ Motion sensor toggle

• 4 Push Buttons

○ Modes

• Motion Sensor

7 Outputs

• 6 LEDs

○ Indicator LEDs

• Signal to Light Control Circuit

24

Input/output pins

The pin set program uses the wiringPi library for working with the pins

Bluetooth communication

25

• C++ to Python

○ Pipes ○

ASCII strings

○ Terminate with “!”

• Specific commands sent over

pipe to communicate

○ “turn off lights!”

Data storage Programs

• 3 Logs: date information, transition information, and preset

event information

• Date log

Mostly background 91 entries (month,day) date format

• preset log (incomplete)

Variable length

• Each has basic functions designed for communication with

main program.

26

Data storage continued

Transition log Variable length Needed for prediction Entries are made of special variable class made of 6 unsigned short ints (month,day,hour,minute,previous state,new state) Has function need to work prediction

27

Prediction Algorithm

• Transition probability
• Originally created by Rolf Heukels and published in his

Master thesis

• Based on the transition for one state to the next
• Has three stages
• Stage one initial point assignment
• Stage two point redistribution
• Stage three prediction creation

28

Stage one: point assignment

• Points given determined by total number of times a state
• ccurs
• Every state given multiplier based on similarity to current

state

• In our case 1 for no similarity 2 for same state and

everything inbetween got a mixed number between 1 and 2 depending on how many aspects where the same

• Run every time the prediction is run

29

Stage two: point redistribution

• Finds every transition occurring within a set range of the

desired time for the prediction

• All transitions summed with weight given based on how

close they are to the desired time

• Points transferred according to number of transitions for one

state to another

30

Stage three: prediction

• Desired state of an item is chosen
• In our case it was if the light was on
• Point for all state where this occurs are summed
• This summation is then divided by the total number of points
• If the result is higher then a set threshold the prediction is

confirmed

31

Mode creation and program merging

• 32

Questions

33

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

Extra Slides

34

Light Control Circuit Calculations

35

Light Control Circuit Test

36

Full Circuit Diagram + Calculations

37

Prediction phase 1 example

38

System Flow Chart

39