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DepartmentofElectricalEngineering
VYASINSTITUTEOFENGINEERINGANDTECHNOLOGY,JODHPUR
(Raj.)
A
PROJECTREPORT
ON
“BluetoothbasedHome
AutomationusingArduino”
Submittedinthepartialfulfilmentfor
bacheloroftechnologydegreeat
RajasthanTechnicalUniversity,Kota
(2016-
Submittedto:-
ElectricalBranch,
VIET,jodhpur
Submittedby:-
Lakshminarayan,
MehulRaj,
PyaraRam,
Jasraj,
OmprakashMeena
1
VYASINSTITUTEOFENGINEERINGAND
TECHNOLOGY,JODHPUR(Raj.)
DepartmentofElectricalEngineering
Thisistocertifythattheprojectentitled,“Bluetoothbased
Home Automation using Arduino"submitted by "Lakshminarayan,
MehulRaj,Jasraj,PyaraRam,OmprakashMeena"inpartialfulfilment
oftherequirementsfortheawardof"B.TechDegree"in"Electrical
Engineering" at the "VYAS INSTITUTE OF ENGINEERING AND
TECHNOLOGY,JODHPUR(Raj.)"isanauthenticworkcarriedoutbyhim
undermysupervisionandguidance.
Tothebestofmyknowledge,thematterembodiedintheprojecthas
notbeensubmittedtoanyotherUniversity/Institutefortheawardof
anyDegreeorDiploma.
Date:
ProjectGuideName Submittedto: Headof
Department:
Mr.AsadZai AnsulBhati Mr.Manish
Bhati
CERTIFICATE
2
TABLEOFCONTENTS
ABSTRACT 3
HOMEAUTOMATION 4
NEEDOFAUTOMATION 5
INTRODUCTION 6
COMPONENTSUSED 7
1.ARDUINOUNOR3 8
2.RC-06BLUETOOTHMODULE 11
3.RELAYMODULE 16
4.ARDUINOIEDSOFTWARE 18
BLOCKDIAGRAM 19
CIRCUITDIAGRAM 20
PROGRAMUSED 21
ADVANTAGES 22
DISADVANTAGES 22
APPLICATION 23
REFERENCES 24
3
I. ABSTRACT
Withadvancementoftechnologythingsarebecomingsimpler
andeasierforus.Automationistheuseofcontrolsystems
andinformationtechnologiestoreducetheneedforhuman
workintheproductionofgoodsandservices.Inthescopeof
industrialization,automationisastepbeyondmechanization.
Whereas mechanization provided human operators with
machinerytoassistthem withthemuscularrequirementsof
work,automation greatly decreases the need forhuman
sensoryandmentalrequirementsaswell.Automationplaysan
increasinglyimportantroleintheworldeconomyandindaily
experience. Automatic systems are being preferred over
manualsystem.Throughthisprojectwehavetriedtoshow
automaticcontrolofahouseasaresultofwhichpoweris
savedtosomeextent.
Thepastdecadehasseensignificantadvancementinthefield
ofconsumerelectronics.Various“intelligent”appliancessuch
ascellularphone,airconditioners,homesecuritydevices,
hometheatres,etc.,aresettorealizetheconceptofasmart
home.TheyhavegivenrisetoaPersonalAreaNetworkin
home environment,where allthese appliances can be
interconnectedandmonitoredusingasinglecontroller.
Home automation involves introducing a degree of
computerizedorautomaticcontroltocertainelectricaland
electronic systems in a building.These include lighting,
temperaturecontrol,etc.
Thisprojectdemonstratesasimplehomeautomationsystem
whichcontainsaremotemobilehostcontrollerandseveral
client modules (home appliances). The client modules
communicate with the hostcontrollerthrough a wireless
4
devicesuchasaBluetoothenabledmobilephone,inthiscase,
anandroidbasedSmartphone.
II. HOMEAUTOMATION
Home/officeautomationisthecontrolofanyorallelectrical
devicesinourhomeoroffice,whetherwearethereoraway.
Home/officeautomationisoneofthemostexcitingdevelopments
intechnologyforthehomethathascomealongindecades.There
arehundredsofproductsavailabletodaythatallowuscontrolover
thedevicesautomatically,eitherbyremotecontrol;orevenby
voicecommand.
Homeautomation(alsocalleddemotics)istheresidential
extensionof"buildingautomation".Itisautomationofthehome,
houseworkorhouseholdactivity.Homeautomationmayinclude
centralizedcontroloflighting,HVAC(heating,ventilationandair
conditioning),appliances,andothersystems,toprovideimproved
convenience,comfort,energyefficiencyandsecurity.Disabledcan
provideincreasedqualityoflifeforpersonswhomightotherwise
requirecaregiversorinstitutionalcare.
Ahomeautomationsystem integrateselectricaldevicesina
house with each other.The techniques employed in home
automationincludethoseinbuildingautomationaswellasthe
controlofdomestic activities,such as home entertainment
systems,houseplantandyardwatering,petfeeding,changingthe
ambiance"scenes"fordifferentevents(suchasdinnersorparties),
and the use ofdomestic robots.Devices may be connected
through a computernetwork to allow controlby a personal
computer,andmayallowremoteaccessfromtheinternet.
Typically,anew homeisoutfittedforhomeautomation
duringconstruction,duetotheaccessibilityofthewalls,outlets,
and storage rooms,and the ability to make design changes
specifically to accommodate certain technologies. Wireless
systemsarecommonlyinstalledwhenoutfittingapre-existing
house,as they reduce wiring changes.These communicate
throughtheexistingpowerwiring,radio,orinfraredsignalswitha
5
centralcontroller.Networksocketsmaybeinstalledineveryroom
likeACpowerreceptacles.
III. NEEDOFAUTOMATION
Earlier,welookedintothefaceoffuturewhenwetalked
aboutautomated devices,which could do anything on
instigationofacontroller,buttodayithasbecomeareality.
a)An automated devicecan replacegood amountof
human working force,moreoverhumans are more
prone to errors and in intensive conditions the
probabilityoferrorincreaseswhereas,anautomated
devicecanworkwithdiligence,versatilityandwith
almostzeroerror.
Replacinghumanoperatorsintasksthatinvolve
hardphysicalormonotonouswork.
Replacinghumansintasksdoneindangerous
environments(i.e.fire,space,volcanoes,nuclear
facilities,underwater,etc.)
Performing tasks that are beyond human
capabilitiesofsize,weight,speed,endurance,etc.
Economyimprovement.Automationmayimprove
in economyofenterprises,societyormostof
humankind.Forexample,whenanenterprisethat
hasinvestedinautomationtechnologyrecovers
its investment,or when a state or country
increases its income due to automation like
GermanyorJapaninthe20thCentury.
b)Thisiswhythisprojectlooksintoconstructionand
implementation ofa system involving hardware to
6
controlavarietyofelectricalandelectronicssystem.
Introduction
Homesofthe21stcenturywillbecomemoreandmore
self-controlledandautomated.Simpledevicessuchasatimer
toturnonone’scoffeemakerinthemorninghavebeenaround
formanyyears,butmuchmoresophisticatedmechanismswill
soonbeprevalentinhomesaroundtheworld.
Imaginewalkingintoyourhomeandbeinggreetedat
thedoorwithlightsilluminatingyourpathwithoutyouever
having to touch lightswitch,with yourfavourite music
streamingthroughthespeakersinwhicheverroom youenter
(becauseyourhomerecognizedthatitwasyouandnotsome
otherhouseholdmember),allwhilehavingthepeaceofmind
knowing thatyourhomeautomation system tookcareof
activatingyoursecuritysystem.Furthermore,suchasystem
couldallowtheusertoscheduleeventstooccuratrecurring
intervals(e.g.,turn on sprinklersystem at4:30a.m.every
TuesdayandThursday).
Thisreportdescribesanapproximationofsuchahome
automationsystem thatwasdesignedandbuiltasafinal
projectfor6.111atM.I.T.Thissystem wasdesignedtobe
flexible and generally programmable,extensible such that
7
addingadditionalfeaturesisrelativelysimple,andmodular
and forward-compatible,so thatnew componentscan be
addedwithoutredesigningtheentiresystem.Toachievethese
goals,thesystem runsauser-definedprogram onaspecial-
purpose processor, using real-world sensor inputs as
operands.
COMPONENTSUSED
Followingcomponentsareusedinthisproject:
1.Hardware
a)ArduinoUNOR3
b)RelaysModule
c)BluetoothModuleRC-05
d)AndroidSmartphone
e)Computer
f)Bulbs(15-100watt)
g)ButtenHolder
h)BatterywithConnector(9V)
i)PlywoodBoard
j)Connectionwires
k)Jumperwires
8
2.Software
a)ArduinoIED(windows)
b)SmartHome(android)
1.ArduinoUNOR3Chip–
Arduino is an open-source, programmable
microcontrollerandsoftwarebasedontheATMegachip.The
ArduinoboardcanbeprogrammedusingtheArduinosoftware.
ThesyntaxforthisissimilartoC/C++andJava.
9
Figure1ArduinoUNOR3
Arduinoiscomputerhardwareandsoftwarecompany,
projectandusercommunitythatdesignsandmanufactures
microcontroller-based kits forbuilding digitaldevices and
interactiveobjectsthatcansenseandcontrolobjectsinthe
physicalworld.
10
Figure2ArduinoUNOpinlayout
Arduino/GenuinoUnoisamicrocontrollerboardbasedonthe
ATmega328P.Ithas14digitalinput/outputpins(ofwhich6
canbeusedasPWM outputs),6analoginputs,a16MHz
quartzcrystal,aUSBconnection,apowerjack,anICSPheader
andaresetbutton.Itcontainseverythingneededtosupport
themicrocontroller;simplyconnectittoacomputerwitha
USBcableorpoweritwithaAC-to-DCadapterorbatterytoget
started...
Technicalspecs
11
Microcontroller ATmega328P
OperatingVoltage 5V
InputVoltage(recommended) 7-12V
InputVoltage(limit) 6-20V
DigitalI/OPins 14(ofwhich6providePWMoutput)
PWMDigitalI/OPins 6
AnalogInputPins 6
DCCurrentperI/OPin 20mA
DCCurrentfor3.3VPin 50mA
FlashMemory
32KB(ATmega328P)
ofwhich0.5KBusedbybootloader
SRAM 2KB(ATmega328P)
EEPROM 1KB(ATmega328P)
ClockSpeed 16MHz
LED_BUILTIN 13
Length 68.6mm
Width 53.4mm
Weight 25g
TheArduino/GenuinoUnoboardcanbepoweredviatheUSB
connection orwith an externalpowersupply.The power
sourceisselectedautomatically.
External(non-USB)powercancomeeitherfrom anAC-to-DC
adapter(wall-wart)orbattery.Theadaptercanbeconnected
byplugginga2.1mm center-positiveplugintotheboard's
powerjack.Leadsfrom abatterycanbeinsertedintheGND
andVinpinheadersofthePOWERconnector.
Theboardcanoperateonanexternalsupplyfrom6to20volts.
Ifsuppliedwithlessthan7V,however,the5Vpinmaysupply
lessthanfivevoltsandtheboardmaybecomeunstable.If
usingmorethan12V,thevoltageregulatormayoverheatand
damagetheboard.Therecommendedrangeis7to12volts.
Thepowerpinsareasfollows:
12
Vin-TheinputvoltagetotheArduino/Genuinoboardwhen
it'susinganexternalpowersource(asopposedto5voltsfrom
theUSBconnectionorotherregulatedpowersource).Youcan
supplyvoltagethroughthispin,or,ifsupplyingvoltageviathe
powerjack,accessitthroughthispin.
5V-Thispinoutputsaregulated5Vfrom theregulatoronthe
board.Theboardcanbesuppliedwithpowereitherfrom the
DCpowerjack(7-12V),theUSBconnector(5V),ortheVINpin
oftheboard(7-12V).Supplyingvoltageviathe5Vor3.3Vpins
bypassestheregulator,andcandamageyourboard.Wedon't
adviseit.
3V3-A3.3-voltsupplygeneratedbytheon-boardregulator.
Maximumcurrentdrawis50mA.
GND-Groundpins.
IOREF-ThispinontheArduino/Genuinoboardprovidesthe
voltagereferencewithwhichthemicrocontrolleroperates.A
properlyconfiguredshieldcanreadtheIOREFpinvoltageand
select the appropriate power source or enable voltage
translatorsontheoutputstoworkwiththe5Vor3.3V.
Memory
TheATmega328has32KB (with0.5KB occupiedbythe
bootloader).Italsohas2KBofSRAM and1KBofEEPROM
(whichcanbereadandwrittenwiththeEEPROMlibrary).
13
InputandOutput
Eachofthe14digitalpinsontheUnocanbeusedasaninput
oroutput,using pinMode(),digitalWrite(),and digitalRead()
functions.Theyoperateat5volts.Eachpincanprovideor
receive20mAasrecommendedoperatingconditionandhas
aninternalpull-upresistor(disconnectedbydefault)of20-50k
ohm.A maximum of40mA isthevaluethatmustnotbe
exceededonanyI/Opintoavoidpermanentdamagetothe
microcontroller.
Inaddition,somepinshavespecializedfunctions:
Serial:0(RX)and1(TX)-Usedtoreceive(RX)andtransmit
(TX)TTL serialdata.These pins are connected to the
correspondingpinsoftheATmega8U2USB-to-TTLSerialchip.
PWM:3,5,6,9,10,and11.Provide8-bitPWM outputwiththe
analogWrite()function.
14
2.RC–05Bluetoothmodule-
RC–05isaBluetoothmodule,whichisusedforcreate
aconnectionbetweentwoBluetoothdevices,itgetssupplied
fromtheArduinochipandalsogiveinstructiontoArduinochip.
Figure3BluetoothModule(frontside)
HC-05moduleisaneasytouseBluetoothSPP(SerialPort
Protocol)module,designed fortransparentwireless serial
connectionsetup.TheHC-05BluetoothModulecanbeusedin
aMasterorSlaveconfiguration,makingitagreatsolutionfor
wirelesscommunication.ThisserialportBluetoothmoduleis
fully qualified Bluetooth V2.0+EDR (Enhanced Data Rate)
3MbpsModulationwithcomplete2.4GHzradiotransceiver
andbaseband.ItusesCSRBluecore04-Externalsinglechip
Bluetooth system with CMOS technology and with AFH
(AdaptiveFrequencyHoppingFeature).
15
Figure4bluetoothModule(backside)
TheBluetoothmoduleHC-05isaMASTER/SLAVEmodule.By
default,thefactorysettingisSLAVE.TheRoleofthemodule
(MasterorSlave)canbeconfiguredonlybyATCOMMANDS.
Theslavemodulescannotinitiateaconnectiontoanother
Bluetoothdevice,butcanacceptconnections.Mastermodule
caninitiateaconnectiontootherdevices.Theusercanuseit
simplyforaserialportreplacementtoestablishconnection
betweenMCUandGPS,PCtoyourembeddedproject,etc.
HardwareFeatures
• Typical-80dBmsensitivity.
• Upto+4dBmRFtransmitpower.
• 3.3to5VI/O.
• PIO(ProgrammableInput/Output)control.
• UARTinterfacewithprogrammablebaudrate.
• Withintegratedantenna.
• Withedgeconnector.
16
SoftwareFeatures
• SlavedefaultBaudrate:9600,Databits:8,Stopbit:1,
Parity:No parity.
• Auto-connecttothelastdeviceonpowerasdefault.
• Permitpairingdevicetoconnectasdefault.
• Auto-pairingPINCODE:”1234”asdefault.
PinDescription
TheHC-05BluetoothModulehas6pins.Theyareasfollows:
1. ENABLE:
WhenenableispulledLOW,themoduleisdisabledwhich
meansthemodulewillnotturnonanditfailstocommunicate.
Whenenableisleftopenorconnectedto3.3V,themoduleis
enabledi.e.themoduleremainsonandcommunicationalso
takesplace.
2. Vcc: SupplyVoltage3.3Vto5V
3. GND:Groundpin
4. TXD&RXD:
These two pins acts as an UART interface for
communication
5. STATE:
Itactsasastatusindicator.Whenthemoduleisnotconnected
topairedwithanyotherBluetoothdevice,signalgoesLow.At
thislowstate,theledflashescontinuouslywhichdenotesthat
themoduleisnotpairedwithotherdevice.Whenthismodule
isconnectedto/pairedwithanyotherBluetoothdevice,the
signalgoesHigh.Atthishighstate,theledblinkswitha
constantdelaysayforexample2sdelaywhichindicatesthat
17
themoduleispaired.
3.RelayModule
Arelayisanelectricallyoperatedswitch.Manyrelaysusean
electromagnettomechanicallyoperateaswitch,butother
operatingprinciplesarealsoused,suchassolid-staterelays.
Relaysareusedwhereitisnecessarytocontrolacircuitbya
separatelow-powersignal,orwhereseveralcircuitsmustbe
controlledbyonesignal.
Figure5RelayModule
Relaysworkon electromagnetism,When theRelaycoilis
energizeditactslikeamagnetandchangesthepositionofa
switch.Thecircuitwhichpowersthecoiliscompletelyisolated
from thepartwhichswitchesON/OFF,thisprovideselectrical
isolation.Thisisthereasonwecancontrolarelayusing5V's
from anArduinoandtheotherendofitcouldberunningan
230Vappliance,the230Vendiscompletelyisolatedfrom the
18
5VArduinocircuitry.
Toconnectthe4RelayboardtoanArduinoisveryeasy
andallowsyoutoturnonandoffawiderangeofdevices,both
ACandDC.Thefirsttoconnectionsarethegroundandpower
pins,youneedtoconnecttheArduino+5vtothe4Relayboard
VCCpinandtheArduinogroundtothe4RelayboardGNDpin.
Then it’s an only a matter of just connecting the
communicationpins,labelledIN1,IN2,IN3andIN4,two4data
pinsontheArduino.Intheexamplecodebelow weused
Arduinopins7,8,9,10.It’sagoodideatoavoidusingData
pins0 and 1 astheyareused bytheArduino forserial
communicationandcancauseproblemswhenuploadingcode
totheArduino.
Figure RelayModuleConnectionFigure6
Thedefaultstateoftherelaywhenthepowerisofffor
COMM(power)tobeconnectedtoNC(normallyclosed),thisis
19
theequivalentofsettingthe4RelayboardsINpintoHIGH(has
+5vsenttoit)ItisasafetyfeaturetonotusetheNCconnector
in-caseyouArduinolosespoweritwillautomaticallyturnsoff
allthe devices connected to the relay. When you have
something connected to the relays NO (Normally Open)
connectorandyousetthecorrespondingINpintoLOW (0v),
powerwillflowinfromtheCOMMconnectorandoutoftheNO
connectorpoweringyourdevice.
4.ArduinoSoftwareIDE
The Arduino/Genuino Uno can be programmed with the
(ArduinoSoftware(IDE).
Theopen-sourceArduinoSoftware(IDE)makesiteasytowrite
codeanduploadittotheboard.ItrunsonWindows,MacOSX,
andLinux.TheenvironmentiswritteninJavaandbasedon
Processingandotheropen-sourcesoftware.
ThissoftwarecanbeusedwithanyArduinoboard.
20
Figure7ArduinoIEDSoftware
BlockDiagram
21
Figure8BlockDiagram
• TodevelopaBluetoothbasedhomeautomationsystem
withArduinoUNOBoardandanAndroidapplication.
• Remotecontrolledhomeautomationsystem providesa
simplersolutionwithAndroidapplicationtechnology.
• Remoteoperationisachievedbyanysmartphone/Tablet
etc.,withAndroidOS,uponaGUI(GraphicalUserInterface)
basedtouchscreenoperation
CircuitDiagram
22
Figure10Projectpitcher
Figure9CircuitDiagram
23
charvar;
voidsetup(){
Serial.begin(9600);
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
pinMode(5,OUTPUT);
}
voidloop(){m
while(Serial.available()==0);
var=Serial.read();
Serial.println(var);
if(var=='1')
{Serial.println("Load1isOn");
digitalWrite(2,HIGH);
}
elseif(var=='2')
{Serial.write("Load1isOFF");
digitalWrite(2,LOW);
}
if(var=='3')
{Serial.println("Load2isOn");
digitalWrite(3,HIGH);
}
elseif(var=='4')
{Serial.write("Load2isOFF");
digitalWrite(3,LOW);
}
elseSerial.println("Invalid!!");
Serial.flush();
}
Programused(Onlyfor2Loadcontrol)
24
Advantages
a)Bluetoothisusedinthishomeautomationsystem,which
havearangeof10to20meterssothecontrolcannotbe
achievedfromoutsidethisrange.
b)ApplicationisconnectedafterdisconnectoftheBluetooth.
c)Whenthenewuserswanttoconnect,firstdownload
applicationsoftwareandthenconfigurationmustbedone.
d)Highpowerconsumptionbecauseofbluetooth
connectivity.
Disadvantages
a)Bluetoothisusedinthishomeautomationsystem,which
havearangeof10to20meterssothecontrolcannotbe
achievedfromoutsidethisrange.
b)Applicationisconnectedafterdisconnectofthe
Bluetooth.
c)Whenthenewuserswanttoconnect,firstdownload
applicationsoftwareandthenconfigurationmustbedone.
25
d)Highpowerconsumptionbecauseofbluetooth
connectivity.
APPLICATIONS
Theprojectdesignedisverypracticalinnaturebecause
everythingcanbecontrolledwiththehelpofjustamobile
phonewhichiswidelyavailablenowadaysandalsoprovesto
behandy.
Alsotheprojectisfeasiblebecausethecostoftheprojectis
verylessascomparedtotheexpensiveWi-Fibasedhome
controlsystemspresentlyavailableinthemarketwhich
requireanadditionalcostofinternetservices.
26
References
www.arduino.org
www.google.com
www.diyhacking.com
www.wikipedia.org
www.elementzonline.com
www.androidcontrol.blogspot.com

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