home automation with raspberry...

Hans-PetterHalvorsen,M.Sc.

HomeAutomationwithRaspberryPi

SystemOverview

RetrievingSensorData

ControllingLight,Heating,OpentheDoor,etc.

Temperature

Light

Camera? Youmay,e.g.,puttheSensorsonaBreadboard,usee.g.aPushButtonforDoorControl,LEDstoillustrateLightandHeatingControlRFID?

HomeAutomation Controller

DigitalSensors?

LabTopics• HomeAutomation/SmartHouseSolutions• InternetofThings(IoT)• Windows10• EmbeddedSystems• Protocols• SensorsandActuators• etc.

3

LabAssignmentOverview1. Setup&Configuration:InstallandConfigure

Windows10ontheRaspberryPi2. FollowStep-by-StepExampleswithBasic

SensorsandActuators3. SelectoneofthefollowingTasks:

a) DigitalSensorswithMonitoring/Loggingb) CameraSurveillancec) RFIDAccessControl

Seenextslidesfordetails...

Note!Notsupported inWindows10IoTCore/VisualStudio.UseMATLABifyouchooseoneofthese(seelaterslides)

Software

YoucandownloadVisualStudioProfessional2015fromDreamSparks

MakesuretoinstallthenecessarySoftwarebeforeyougotothelaboratory!

Software

Windows10IoTCore

Note!TheRaspberryPi2should useWindows10IoTCore,whileyourPCshould runthefullversionofWindows10

Hardware

NetworkEquipment?(ifneeded)

Hardware

YourPersonalComputer

SmallSensors

3.Camera

2.RFID

HumiditySensor

1.DigitalSensors

Temperature

TemperatureLight

Windows10IoT Core

HomeAutomation


HomeAutomationsolutionshasgreatlyincreasedinpopularityoverthepastseveralyears.HomeAutomationmayincludecentralizedcontroloflighting,heating,ventilationandairconditioning,appliances,securitylocksofgatesanddoorsandothersystems,toprovideimprovedconvenience,comfort,energyefficiencyandsecurity.

HomeAutomation• Thepossibilitiesareendless,youcancollectdatafromsensors,cameramonitoring,securitycontrol,lightcontrol,etc.

• TheRaspberryPiisagreatHomeAutomationControllerthatcanbeusedforthesepurposesandmore

9

RaspberryPi2


https://www.raspberrypi.org https://dev.windows.com/iot

A900MHzquad-coreARMCortex-A7CPU,1GBRAM

Windows10IoTCore

Small-ScaleComputer

RaspberryPi2- OverviewTheRaspberryPi2isalowcost,credit-cardsizedcomputerthatplugs intoacomputermonitororTV,andusesastandardkeyboardandmouse.TheRaspberryPi2canrunWindows10IoTCore.

13x- GPIOpins2x- SPIbuses1x- I2Cbus2x- 5Vpowerpins2x- 3.3Vpowerpins8x- Groundpins

3.5mmaudiojack/compositevideo

RaspberryPi2- Connectors

12

TheRaspberryPi2typeBrunsaquad-coreARMCortex-A7CPUand1GBRAM.ItoffersthefollowingConnectors:• 4xUSB2.0sockets• 10/100BaseT Ethernetsocket• HDMIvideosocket• RCAcompositevideosocket• microSD cardsocket• PoweredfrommicroUSB socket• 3.5mmaudiooutjack• HeaderforGPIOandserialbuses(I2CandSPI)• DisplaySerialInterface(DSI)15wayflatflexcableconnectorwithtwodata

lanesandaclocklane• Cameraconnector15-pinMIPICameraSerialInterface(CSI-2)

RaspberryPi2- PinMappings

RaspberryPi2– GPIO

using Windows.Devices.Gpio;

public void GPIO()

// Get the default GPIO controller on the systemGpioController gpio = GpioController.GetDefault();if (gpio == null)

return; // GPIO not available on this sytem

// Open GPIO 5using (GpioPin pin = gpio.OpenPin(5))

// Latch HIGH valuepin.Write(GpioPinValue.High);

// Set the IO direction as outputpin.SetDriveMode(GpioPinDriveMode.Output);

// Close pin - will revert to its power-on state

GPIO:GeneralPurpose Input/Output

ThesePinscanbeusedforDigitalInput/Output

ThisExampleopensGPIO5 asanoutputandwritesadigital‘1’outonthepin

CommunicationProtocols• UART(UniversalAsynchronousReceiver/Transmitter,)• ...

– http://en.wikipedia.org/wiki/Universal_asynchronous_receiver/transmitter

• SPI(SerialPeripheralInterface)– ...– http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus

• I2C(Inter-IntegratedCircuit)– ...– http://en.wikipedia.org/wiki/I2C

15http://www.byteparadigm.com/applications/introduction-to-i2c-and-spi-protocols

RaspberryPi2– SPIBus• SerialPeripheralInterface(SPI)isasynchronous serialdataprotocolusedby

microcontrollers forcommunicatingwithoneormoreperipheraldevicesquicklyovershortdistances.

• WithanSPIconnection thereisalwaysonemasterdevice(usuallyamicrocontroller)whichcontrolstheperipheraldevices.

• SPIdevicescommunicateinfullduplexmodeusingamaster-slavearchitecturewithasinglemaster.

• TheinterfacewasdevelopedbyMotorolaandhasbecomeadefactostandard.• Typicalapplicationsincludesensors,SecureDigitalcards,andliquidcrystaldisplays

(LCD).

http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus

SCLK:SerialClock(output frommaster)MOSI:MasterOutput,SlaveInput(output frommaster)MISO:MasterInput,SlaveOutput(output fromslave)SS(orSC):SlaveSelect(activelow,outputfrommaster)

https://learn.sparkfun.com/tutorials/serial-peripheral-interface-spi

RaspberryPi2– SPIBusThereare2SPIbuscontrollersavailableontheRPi2:SPI0 andSPI1

SPI0:Pin19- SPI0MOSIPin21- SPI0MISOPin23- SPI0SCLKPin24- SPI0CS0Pin26- SPI0CS1

SPI1:Pin38- SPI1MOSIPin35- SPI1MISOPin40- SPI1SCLKPin11- SPI1CS0

using Windows.Devices.Enumeration;using Windows.Devices.Spi;

public async void SPI()

// Get a selector string for bus "SPI0"string aqs = SpiDevice.GetDeviceSelector("SPI0");

// Find the SPI bus controller device with our selector stringvar dis = await DeviceInformation.FindAllAsync(aqs);if (dis.Count == 0);

return; // "SPI0" not found on this system

// Use chip select line CS0var settings = new SpiConnectionSettings(0);

// Create an SpiDevice with our bus controller and SPI settingsusing (SpiDevice device = await SpiDevice.FromIdAsync(dis[0].Id, settings))

byte[] writeBuf = 0x01, 0x02, 0x03, 0x04 ;device.Write(writeBuf);

RaspberryPi2- I2CBus

http://en.wikipedia.org/wiki/I2C

• I²C(Inter-IntegratedCircuit),isamulti-master,multi-slave,single-ended,serialcomputerbus

• Itistypicallyusedforattachinglower-speedperipheralICstoprocessorsandmicrocontrollers.

• I²CistypicallyspelledI2C(pronouncedI-two-C)• TheI²Cbuswasdevelopedin1982byPhilipsSemiconductor.• TheI²Cprotocolrequiresonly2wiresforconnectingalltheperipheraltoamicrocontroller.

https://learn.sparkfun.com/tutorials/i2c

RaspberryPi2- I2CBusThereisoneI2Ccontroller I2C1 exposedonthepinheaderwithtwolinesSDA andSCL.1.8KΩinternalpull-up resistorsarealreadyinstalledontheboardforthisbus.

Pin3- I2C1SDAPin5- I2C1SCL

using Windows.Devices.Enumeration;using Windows.Devices.I2c;

public async void I2C()

// Get a selector string for bus "I2C1"string aqs = I2cDevice.GetDeviceSelector("I2C1");

// Find the I2C bus controller with our selector stringvar dis = await DeviceInformation.FindAllAsync(aqs);if (dis.Count == 0)

return; // bus not found

// 0x40 is the I2C device addressvar settings = new I2cConnectionSettings(0x40);

// Create an I2cDevice with our selected bus controller and I2C settingsusing (I2cDevice device = await I2cDevice.FromIdAsync(dis[0].Id, settings))

byte[] writeBuf = 0x01, 0x02, 0x03, 0x04 ;device.Write(writeBuf);

SCL:SerialClockLine

SDA:SerialDataLine

Sensors&Actuators


BasicSensors&Actuators

21

Analog TemperatureSensor

PushButtonLED

ADC

Analog toDigitalConverter

TMP36

http://home.hit.no/~hansha/documents/lab/Lab%20Equipment/iot_sensors.htm

Windows10IoTCore


Windows10IoT Core• Windows10IoT CoreisasmallscaledversionofWindowsrunningonsmalldevicessuchasRaspberryPi2

• https://dev.windows.com/iot

IoT– InternetofThings

RaspberryPi+Windows10• Install andConfigureWindows10ontheRaspberryPi

• CreatesomeExamples (2?)(seenextslides)inordertobefamiliarwithArduino+Windows10IoTCore

• AddValue(ImprovethemwithyourPersonaltouch)totheExamplesyouselect!!

Windows10IoTForConfiguration...Followtheinstructionshere:https://dev.windows.com/iot

25

HelloWorldExampleApp

Followtheinstructionshere:http://ms-iot.github.io/content/en-US/win10/samples/HelloWorld.htm

26

BlinkingLEDExampleFollowtheinstructionshere:http://ms-iot.github.io/content/en-US/win10/samples/Blinky.htm

27

PushButtonExampleFollowtheinstructionshere:http://ms-iot.github.io/content/en-US/win10/samples/PushButton.htm

28

PotentiometerSensorExample

Followtheinstructionshere:http://ms-iot.github.io/content/en-US/win10/samples/Potentiometer.htm

29

TemperatureSensorExample

Followtheinstructionshere:https://www.hackster.io/4796/temperature-sensor-sample

TMP36TemperatureSensor

ADCConverter

ThissampleusesSPIcommunication.AtemperaturesensorisconnectedtoaADC,thenADCisconnectedtoraspberryPi2throughSPIPins.

31Congratulations!- YouarefinishedwiththeTask

DigitalSensors(I2C)


DigitalSensors(I2C)

• CreateanApplicationforMonitoring/LoggingDatafromDigitalSensors

• Useone/orbothofthefollowingSensors:– TC74DigitalTemperatureSensorwithI2CInterface– HoneywellHumiditySensorwithI2CInterface

DigitalTemperatureSensorwithI²CInterface

34http://home.hit.no/~hansha/documents/lab/Lab%20Equipment/iot_sensors.htm

HoneywellHumiditySensor

35

withI²C/SPIInterface

HoneywellHIH-6120-021-0014-PinSIPTemperature&Humidity Sensor

http://home.hit.no/~hansha/documents/lab/Lab%20Equipment/iot_sensors.htm

(Thissensorisalittlemorecomplicatedtouse)

Camera


Camera- HomeSecurityApplication

• CreateanApplicationforVideoMonitoring,i.e.,anApplicationviewinganImageorVideofromtheRaspberryPiCamera

• Useeither–Windows10/VisualStudio2015– MATLABorSimulink

RaspberryPiCameraTheRaspberryPiCameraisidealforHomeSecurityApplications

ConnectitdirectlytotheCameraInterfaceon theRaspberryPi

https://www.raspberrypi.org/help/camera-module-setup/

5megapixelresolutionStillimages2592x1944Video:1080p30

Note!Thismoduleisonlycapableoftakingpicturesandvideo,notsound

RaspberryPiSupportfromMATLABhttp://se.mathworks.com/hardware-support/raspberry-pi-matlab.html

UsingMATLABwithaRaspberryPiCameraBoard:http://se.mathworks.com/videos/using-matlab-with-a-raspberry-pi-camera-board-94192.html

WiththeMATLABSupportPackageforRaspberryPiHardware,youcanaccessperipheraldevicesthroughtheRaspberryPi.ThissupportallowsyoutoacquiredatafromsensorsandimagingdevicesconnectedtotheRaspberryPi.Specifically,alibraryofMATLABfunctionsareprovidedforthefollowingRaspberryPiadd-onsandinterfaces:• RaspberryPiCameraBoard• I2Cinterface• SPIinterface• Serialinterface• GPIO

IfyouinadditionhasMATLABImage/VisionToolbox(es), youcanusebuilt-infunctions forfacerecognition, etc.

RFID


RFID– AccessControlApplication

• CreateanApplicationforreadingRFIDTagsusingaRFIDCardReader

RFIDRadioFrequencyIDentification (RFID)isthewirelessuseofelectromagneticfields totransferdata,forthepurposesofautomaticallyidentifyingandtrackingtagsattachedtoobjects.

44https://en.wikipedia.org/wiki/Radio-frequency_identification

NFC• Nearfieldcommunication(NFC)isthesetofprotocolsthatenableselectronicdevicestoestablishradiocommunicationwitheachotherbytouchingthedevicestogetherorbringingthemintoproximitytoadistanceoftypically10cmorless.

• TwoNFCenableddevicesshouldbebroughtwithinfewcentimetersofeachothertoconnectthem,andthatiswhy,itisreferredastouchbasedinteraction

• ExampleApplePay

45https://en.wikipedia.org/wiki/Near_field_communication

RFIDvs.NFC• NFCisactuallyanextensionorasubcategoryofRFID.• NFCisthenewerversionofRFIDthatistypicallyforuseinaveryshort

distanceformakingpaymentsanddownloadingadvertisements• AsNFCisasafertechnologywithitsshortrangeofworkcomparedto

otherwirelesstechnologies,itcanbewidelyusedforpayments,ticketingandserviceadmittance.

• RFIDismorepopularthannearfieldcommunicationsbecauseithasawiderspectrumofuses.

• OneofthegreatfeaturesofNFCisthatNearfieldcommunicationscanbeinstalledinportabledeviceslikesmartphones.NFCtechnologycanactuallybeembeddedinachip

http://www.differencebetween.com/difference-between-rfid-and-vs-nfc/http://www.create-qr-codes.org/nfc/versus.html

ParallaxRFIFReader

47

RFIDCardReader,Serial PassiveRFIDTags

www.parallax.com - Searchfor28140

SerialInterfaceforusewithamicrocontroller

RaspberryPiSupportfromMATLABhttp://se.mathworks.com/hardware-support/raspberry-pi-matlab.html

WiththeMATLABSupportPackageforRaspberryPiHardware,youcanaccessperipheraldevicesthroughtheRaspberryPi.ThissupportallowsyoutoacquiredatafromsensorsandimagingdevicesconnectedtotheRaspberryPi.Specifically,alibraryofMATLABfunctionsareprovidedforthefollowingRaspberryPiadd-onsandinterfaces:• RaspberryPiCameraBoard• I2Cinterface• SPIinterface• Serialinterface• GPIO

FritzingAopensourcetoolformakingsimplewiringdiagramforyourhardwarewiringhttps://en.wikipedia.org/wiki/Fritzinghttp://fritzing.org

WiringmadewithFritzing

Congratulations!- Youarefinishedwithall theTasksintheAssignment!


UniversityCollegeofSoutheastNorwaywww.usn.no

E-mail:[email protected]:http://home.hit.no/~hansha/

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