Remote Aquarium Monitor and Control

System

Christopher BunkJoshua Hoiland

What if I have to leave it?

Common ConcernsCommon Concerns

Aquarium accessoriesAquarium accessories LightLight Water heaterWater heater Filter/pumpFilter/pump

FeedingFeeding How can I be How can I be suresure my fish are OK? my fish are OK?

We have the solution.We have the solution.

System ArchitectureSystem Architecture

Remote SystemSystem PC

RS232

InternetTCP/IPTCP/IP

Control &Monitoring

System

USB

WEBCAM HC12

NIC

NIC

USB

Serial

User InterfaceUser Interface

MeasuredTemperatu

re

DesiredTemperatu

re

SetTemperature

Feed Fish

Temperature History

Help

LogOut 22

Food Remainin

g

ON

OFF

PUMPS LIGHTS

GUI FeaturesGUI Features

Control Monitoring

Feed Fish Fish food remaining doses

Adjust Desired Water Temperature

Water Temperature

Light On/Off Lights On/Off

Filtration System On/Off Filtration System On/Off

Set/Reset Food Count Web Cam Streamed Image

Temperature trended graph

System System DesignDesign

System Control DiagramSystem Control DiagramAquariumLightHeaterTemperature

sensorFilterFeederInternetRemote ClientPC ServerHC-12Web CamRelayVoltage dividerRelayRelay

ThermistorThermistor

R25 3.3K ±5% Temperature range:

-40 to +125 °C Maximum dissipation

500 mW Cost: $0.68

BCcomponents 2322 640 3338

RelayRelay

Compact 1-amp SPST Reed Relay

Coil Voltage 5 VDC Contact Rating 125

VAC Operation time: 1.5 ms Cost: $2.49

Radio Shack275 0232

Stepper MotorStepper Motor

7.5˚ per step Power Source: 5 VDC

Feeding MechanismFeeding Mechanism Allows 31 feedings

SIDE VIEWstepper motorFood compartmentsfeeder opening

Feeding MechanismFeeding Mechanism

stepper motorFood compartmentsTOP VIEW

MotorolMotorola HC-12a HC-12

(provided by (provided by RIT)RIT)

Highlighted Highlighted ports are ports are usedused

HC-12 Port UsageHC-12 Port Usage AA

Pin 0 – Pump RelayPin 0 – Pump Relay Pin 1 – Light RelayPin 1 – Light Relay Pin 2 – Heater RelayPin 2 – Heater Relay

BB Pins 0-3 – Stepper Motor ControlPins 0-3 – Stepper Motor Control

ADAD Pin 4 – Analog Thermistor InputPin 4 – Analog Thermistor Input

HC-12 Port UsageHC-12 Port Usage Port S used for serial communicationPort S used for serial communication

Serial Communication Serial Communication CodeCode

serial_init: ; To use the serial port, one must set the baud rate. ; The 68HC12 is capable of speeds up to 38400. Here, we ; set it to 9600 baud. The value here is a 16 bit divisor. ; ldd #52 ; Value from Baud Rate Generation Table std $C0 ; SCI 0 Baud Rate ldaa #$0C ; Enable transceiver staa $C3 ; SCI 0 Control 2 rts

putchar: ; putchar outputs a character to serial port 0 ; Call with character in register A ; brclr $C4, #$80 putchar ; check SCI 0 Status 1 staa $C7 ; SCI 0 Data Low Byte rts

Control AlgorithmsControl Algorithms

Temperature Control

if( heater_on ){ if( current_temperature > desired_temperature ){ turn_off_heat(); }} else{ if( current_temperature < ( desired_temperature - tolerance ) ){ turn_on_heat(); }}

Control AlgorithmsControl Algorithms

Feeder Control

if( num_feedings_left > 0 ){ move_stepper( CCW 1 slot ); num_feedings_left -= 1;} else { return error( no food left );}

Software ArchitectureSoftware Architecture

PC Server ArchitecturePC Server Architecture

USBPORT

SerialPort

VideoControl And

MoitoringSystem

RS-232USB

Windows 2000System

Apache Web ServerPort 80

PropriataryStreamingSoftware

fromWeb Cam

Manufacturer

8420

Java ServletPort 8420 - Com Relay

Program

Port 8421 - Servlet Interface

Communicationsrelay programbetween serial

port and TCP/IPPort 8420

MySQLDatabase

TBDPORT

RemoteComputer

Web Page request, AppletCode and XML temerature

file request

Servlet/Applet Protocol

Web Cam Streamed Video

With a little help from With a little help from Open SourceOpen Source

Apache web serverApache web server PHP Module InstalledPHP Module Installed MySQL Database Running in MySQL Database Running in

BackgroundBackground Com Relay ProgramCom Relay Program

The ServletThe Servlet

Communicates in between 2 ports; Communicates in between 2 ports; 8420,8421.8420,8421.

Ensures simultaneous commands to Ensures simultaneous commands to the serial port are not made.the serial port are not made.

Trend temperature data to MySQL Trend temperature data to MySQL database every five minutesdatabase every five minutes

Web Cam ServerWeb Cam Server Will rely on Web Cam’s proprietary streaming Will rely on Web Cam’s proprietary streaming

technology.technology. Applet will be built around it’s viewing Applet will be built around it’s viewing

dimensionsdimensions

Com RelayCom Relay Simply Relays serial communication and Simply Relays serial communication and

TCP/IP communication by seamlessly TCP/IP communication by seamlessly stripping the header from the packetsstripping the header from the packets

Makes dealing with serial port simpleMakes dealing with serial port simple

Remote PC ArchitectureRemote PC Architecture

Web Page is loaded that streams fish Web Page is loaded that streams fish tank video, and loads control and tank video, and loads control and monitoring appletmonitoring applet

Applet connects to servlet and Applet connects to servlet and continually polls for status unless a continually polls for status unless a command is requestedcommand is requested

Help and Logout Options availableHelp and Logout Options available

SecuritySecurity

Port 80 requests password protected Port 80 requests password protected through apache htaccess filesthrough apache htaccess files

Port 8420 only accepts local Port 8420 only accepts local connectionsconnections

Port 8421 Requires password and day Port 8421 Requires password and day of the year hash to begin of the year hash to begin communicationcommunication

All other ports configured to be All other ports configured to be blocked blocked

Temperature MonitoringTemperature Monitoring Thermistor look up table in GUI and Servlet so Thermistor look up table in GUI and Servlet so

only un scaled values are sent to HC-12.only un scaled values are sent to HC-12. Applet retrieves a dynamically created XML file Applet retrieves a dynamically created XML file

for last 24 hours of temperature data and for last 24 hours of temperature data and displays on XY graphdisplays on XY graph

Desired temperature can be selected and the set Desired temperature can be selected and the set temperature button will confirm the changetemperature button will confirm the change

XML FormatXML Format

<TEMP> – Represents one temperature readingAttributes:Id - Unique identifier for every readingTime - Date and Time Stamp of readingContentValue - Recorded Scaled Value for temperature in FahrenheitExample Entry<TEMP Id=”24” Time= “2002-09-17 01:06:51”>24.5</TEMP>

Expandability / Other Expandability / Other UsesUses

Architecture fits a wide variety of Architecture fits a wide variety of remote monitoring solutionsremote monitoring solutions

Expand to other types of pets, Expand to other types of pets, children, housechildren, house

Allow monitoring only connections Allow monitoring only connections and control connectionsand control connections

Cost EstimatesCost Estimates

Item Quantity CostHC-12 1 N/APC Server 1 N/AAquarium 1 N/AFish/misc. aquarium supplies — $25 Web cam 1 $80 Aquarium light 1 $25 Aquarium Heater 1 $17.50 Filter/pump 1 $15 stepper motor (for feeder control) 1 N/ASubmersible thermistor temperature sensor 1 $1 120V -> 5V relays 3 3 @ $2.50 = 7.50Totals $171

Project MilestonesProject Milestones

Project Milestone Scheduled Completion Modified Completion Current StatusPreliminary research and proposal 09/15/02 Complete (9/15/02)Design presentation 09/17/02 Complete (9/15/02)

Control the relays with HC-12 09/24/02 09/30/02 Complete (9/30/02)

Calibrate temperature sensor 09/24/02 10/03/02 Complete (10/4/02)Streaming web cam media 09/24/02 Complete (9/22/02)Feeder control device 10/01/02 10/15/02 Complete (10/20/02)Local control software functional 10/08/02 10/17/02 Complete (10/20/02)

PC and HC-12 communication 10/15/02 10/15/02 Complete (10/16/02)Interface control software with web interface 10/15/02 Complete (10/15/02)Hardware testing 10/22/02 10/26/02 PartialSoftware testing 10/22/02 10/26/02 Partial

Project Presentation and Paper 10/29/02 Partial

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