COMPUCCINO
Kalani Rathnabharathi
Vithya Shanmugam
Robert Armstrong
Aaron Kulp
Project Background
 Development of a networked smart appliance
 Remotely controlled appliances:
• Coffee Maker
• Toaster
• Microwave
• Blender
• Music System
 Materialize concepts through two processors
communicating with sensors
2
Overall System
Web Page
CONTROLLER
Ethernet/
Internet
PROCESSORS
Local Sensors &
Controllers
COFFEE
MAKER
MIXER/
BLENDER
TOASTE
R
MICROWAVE
MUSIC
SYSTE
M
3
Capstone Focus
Web Page
CONTROLLE
RUser
Interface
Ethernet/
Internet
PROCESSOR
S
Local Sensors &
Controllers
COFFEE
MAKER
4
Functional Block Diagram
Communicate
w/ Webpage
PROCESSOR
1
Monitor/
Control Coffee
Maker
PROCESSOR
2
COFFEE
MAKER
Temp
Contro
l
Heater
Contro
l
H2 O
Level
RS-232/RF
H2 O
Qualit
y
Monitor/
Control Each
Function
Brew
Cycle
Coffee
Timer
Grinde
r
Strength
5
Network Processor
 The network processor can be one of many
peripherals
• Communicates with the local embedded processors
via RS-232
 Enables remote connectivity to the appliances
 Our particular implementation will be an
embedded web server
• From this web page, the user will be able to
remotely monitor and control the system
6
Network Processor Cont…
 Our implementation of the network processor will be
an Intel 386 running at 33 MHz on an embedded
processor board
 This processor will run TS-Linux with the Apache
web server
 Board features:
•
•
•
•
Dual RS-232 and RS-485 ports
8 to 32 MB RAM
8 to 128 MB Compact FLASH storage or Disk-on-Chip
40 general purpose digital I/O
7
Remote User Interface
 The remote user interface will, in this case, consist
of an interactive web page hosted by the network
processor
 After logging onto this web page, the user will
have access to all of the sensors and be able to
control all aspects of the device’s operation
 Using CGI scripting, this web page will be
dynamically configured and will communicate with
the local processors via the RS-232 port.
8
Processor 2
 Motorola HC12 Demo PCB
 PCB features:
– 16 Bit MCU
– 68K Core
– 8 ACD Channels and numerous I/O’s
– RS-232 Interface (Interface to Processor 1)
– BDM interface(Programming and Debugging)
– 32KBytes of Flash EEPROM
– Jumper EEPROM
9
Menu Options - Control
 Coffee Strength (grinder)
 Timer (Brew)
 Clock
10
Menu Options - Monitor
 Coffee Temperature
 H2O Quality/Level
 Coffee Strength (Tint)
 Timer
 Clock
11
Sensors
 Through sensors, ability to monitor and
control features of coffee making
 Monitor
• Coffee grind
• Strength of Coffee
• Temperature
 Control
• Cup size
• Time of Brew
• Temperature
12
Temperature Controls
 Temperature Monitor
• Monitoring temperature with sensors that will use
variable resistors that changes resistance according
to temperature.
• Transmitting this information to an A to D converter.
 Temperature Control
• Turning off hot plate upon censoring of undesired
rise in temperature
13
Water Level & Quality
 Water Level Monitoring
• Monitoring water level through an ultrasonic sensor
attached to lip of coffee pot
• Monitoring water level through a floating sensor
• Observing water quality through conductivity of
water
 Water Level Control
• Observing with ultrasonic sensors the amount of
water in pot and then terminating water flow once
desired cup size is filled
14
Timer
 Timer Monitoring
• Monitoring duration of brew cycle and reporting
results locally and remotely to user; reports time
elapsed from start of brew
 Timer Control
• Controlling initialization of brew upon request for a
certain day and time
15
Brew Cycle
 Monitoring Brew Strength
• Placing optical sensors at the sides of the coffee pot to measure
light intensity and having LED indicators
 Control of Cup Size
• Utilizing ultrasonic sensor to periodically sense water level and
terminating water flow once desired coffee cup size is realized
 Grinder Strength Monitor
• Monitoring through recordings of last brew, controlling how
fine the coffee is ground by running the motor, and reporting
the status of the current coffee bean grind
16
Power Supply
 Design our own power supply for desired
DC voltages (input 112-115 AC to 3.3 and
or 5 V DC)
17
Safety Features
 Make sure that the user is shielded from
hazardous voltages
 Utilizing heat insulators around the hot
plate to prevent burns
 Various shut-off switches
• Grinder
• Hot plate
• H20 Reserve (water quality)
18
Division of Labor and Schedule
19
Risks & Contingency Plan
 Reduce the number of sensors
 Allotting enough time for unfamiliar
technology
 Allotting enough time for debugging
(2weeks)
20
Costs
ITEM
COST
i386 Embedded Server
$300
Coffee Pot
$50
CAT-5 Networking Cable
$5
RS-232 Crossover cable
$5
LCD
$10
Keypad
$5
Misc. Electronics Components
$30
Misc. Mechanical Components
$30
Total
$435
21
QUESTIONS???
22