Upload
others
View
5
Download
0
Embed Size (px)
Citation preview
Home Enhancement SuiteNathan Irvin, William Bouchonnet, Daniel Sabo, Allen Humphreys
SummaryThe Home Enhancement Suite is a package that will control various aspects of a room in an autonomous fashion when a user is recognized through RFID. Currently, there are home automation kits available, but generally these do not incorporate different settings for different people. The Home Enhancement Suite will allow a user to automate the lighting as well as set up an HDMI product, such as a television, to their favorite channel and volume.
Updated PSSCs1. An ability to detect a user based on RFID and determine which
user has priority, displaying the user's identity on an LCD.
2. An ability to adjust the light intensity to match a user’s settings through X10 protocol.
3. An ability to adjust a television set or other HDMI device using CEC-HDMI protocol, to a user's preferred settings. (ON/OFF, Channel, Volume)
4. An ability to unlock a door when an acceptable RFID is present.
5. An ability to select/set preferred settings through a computer program and the ability to save the "light settings" with the press of a button.
Block Diagram
micro
PLIX
RJ-11 PL 513Transmitter
ACOutlet
X10Power Supply +5
USBHUB
RFIDReaders
spi+3.3
mini
Ambient Light
Sensor
ethernet(on-chip)
ADC
USBCEC-HDMI
I/O
electricstrike
(door lock)
I/O
LCD
spi
user saveI/O
Major ConstraintsCost - Would like to stay under the market price for similar equipment, which is relatively expensive.
Ideally, <$250 for each unit including all necessary peripherals
Variability - Accept many user profiles such that the system is not limited for a large group of people
Efficient - Although not a primary concern, the concept of home automation lends to a “green” initiative and therefore the system should be conscientious of this.
Computation RequirementsIdentify user
Display active profile on LCD
Access profile
System will be connected via Ethernet to a PC
Initiate proper protocols
X-10
CEC-HDMI
Interface Requirements
Up to 3 RFID readers connected via USB
Connect to a PL513 X-10 transmitter via RJ-11
Connect to a PC via Ethernet
Connect to an electric strike for operating the door lock
Most likely through a 2-pin header
On-Chip PeripheralsEthernet (1)
Used for connection to PCUSB (1)
Will connect to a HUB controller expanding total USB availability to 4, of which 3 are required
SPI (2)Interfacing with the PLIX LCD
General Purpose I/O (3)Electric strike signal, CEC comm., “user save”
ADC (1)Ambient light sensor
Off-Chip PeripheralsSerial PLIX - communicates the X-10 protocol to the PL513
PL513 -- X-10 transmitter connected to AC
USB hub controller IC - Expands the on-chip USB to 4 downline
RFID reader modules - connected via USB to main PCB
Electric strike - Locking mechanism
Power Constraints
Everything will be powered by A.C.
There will be an on-board power supply to provide the appropriate DC signals and necessary current to the electric strike when triggerd
Both a 5V and 3.3V regulator will be used as cost is not a major concern and the system should be as efficient as possible
Packaging Constraints
There are no major constraints
Overall the unit should be unobtrusive and fit on a typical desk top or entertainment stand
The system is not portable and therefore weight and stability are not of primary concern
Cost ConstraintsThere are no other systems currently available that perform this exact set of tasks.
Other systems tend to include more things (temperature, surveillance, irrigation), but they also require the purchase of additional modules adding up to well over $1000 for basic functionality
The goal is that the Suite remain much less for the included functions.
<$250 per unit
Component Selection
Microcontroller (must meet previously mentioned On-Chip requirements)
PIC32MX664F064L
Ethernet, USB, 4 SPI, 16 A/D, 85 I/O, Internal Oscillator, 512k Flash, 64k RAM
AT32UC3A0512
Ethernet, USB, 6 SPI, 8 A/D, 109 I/O, Internal Oscillator, 512k Flash, 64k RAM
Component Selection continued
PLIX - only available through Micromint
Ambient Light Sensor
Vishay -- TEMT6000(larger size) or TEMT6200
Both have similar characteristics, but footprint is different
USB Controller IC
(TI)-TUSB2046B (more readily available)
(Atmel)-AT43301
Both utilize 1 upstream USB to create 4 downstream
Questions?