ADVANCEDEV3PROGRAMMINGLESSON

DataLogging(Part1)BySanjayandArvindSeshan

ì Learnwhatdataloggingis

ì LearnthedifferentwaysofdoingdataloggingontheEV3

ì LearnhowtousetheLiveDataLogging,RemoteDataLoggingandBrickDataLoggingfeatureusingatemperaturesensor

ì Prerequisites:MustownanNXTTemperatureSensor,MusthavetheEduversionoftheEV3SoftwareandEduversionofbrickfirmware.

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LessonObjectives

ì TheEV3softwareprovidesasimplewaytocontinuouslyrecordsensorreadingstoafileandtoplotthevalueslater.ThisiscalledDataLogging.

ì WhyuseDataLogging:ì Greatforscienceexperiments.InPart1,wewillshowhowyou

canrecordvaluesliketemperatureforascienceproject.ì Greatforunderstandingrobotprogrammingblocks.InPart2,we

willshowhowtousedataloggingtomeasurethedifferencebetweenturns.

ì Greatforunderstandingsensorbehavior.InPart3,wewillshowhowtousedataloggingtounderstandthedetailsofsensorssuchasthegyrosensor.

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WhatisDataLogging?

1. LiveDataLogging:RealtimedatacollecteddirectlyintheEV3software

2. RemoteDataLogging:Usethethebricktocollectdata,andtransferthedatatothecomputerforanalysis

3. BrickDataLogging:Runtheexperimentdirectlyfromthebrick

4. Autonomous.CollectdatawiththeDataLoggingblock.Thedataisstoredonthebrick.

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HowdoyoudatalogonanEV3?

Lesson1:Temperature

SensorExperiment

Lesson2:Differences

BetweenTurns

Thereare4waystodatalogusingtheEV3MINDSTORMS:

ì Challenge:WewilluseaTemperatureSensortologthechangingtemperatureofwater.

ì Designyourownexperiment.Forexample,youcantryplacingthetemperaturesensorprobeatroomtemperaturewater,thenboilingwaterandthencoldwater.

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LiveDataLogging

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LiveDataLogging(TemperatureSensor)

STEP1:StartaNewExperiment inanexistingproject

STEP2:TurnoffOscilloscopeMode

STEP3:Pickyourduration, samplerate,sensorandunits.

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LiveDataLogging(TemperatureSensor)

STEP4:AllsensorsconnectedtotheEV3willbeautomaticallyadded.Ifyoudonotwanttocollectdatawithaparticularsensor, clickthe“X”nexttoit.

STEP6:Placetemperatureprobe inhot/cold liquidandwatchthegraph(seenextslide)

STEP5:DownloadandRun

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Results/Solution

1.Roomtemperatureprobeplacedinboilingwater

2.Temperatureincreases

3.Proberemovedandplacedincoldwater

Asimilargraphwillappearliveonyourscreen.

ì NowthatwehavetriedLiveDataLogging,let’slookattwootherwaystocollectdatawhenthecomputerisn’taround:ì RemoteDataLogging:Usethethebricktocollectdata,and

transferthedatatothecomputerforanalysisì BrickDataLogging:Runtheexperimentdirectlyfromthebrick

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OtherWaystoCollectData

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RemoteDataLoggingInstead

STEP6:TakeyourrobotsomewhereelseandruntheexperimentfromthescreenSTEP7:Placetemperatureprobe inhot/cold liquid

STEP1-4:Repeatsteps1-4oftheLiveDataLogging

STEP8:ConnectyourrobotandclickontheUploadIcon.IntheDataLogFileManager,pickthecorrectfiletoimport.

UploadIcon

Download Icon

STEP5:ClickontheDownload icon

TheseiconsappearonlywhenyouareinanopenEXPERIMENT(notaProject)

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UsingBrickDataLoggingInstead(Part1)

STEP2:Clickonthewrenchtosetupsensors

STEP4:Placetemperaturesensorprobe inhot/coldliquid

STEP1:GotothirdtabonBrickMenuandpickBrickDatalog

Step5:Clickonthesphereicontostartandstopcollectingdata

STEP3:Clickoniconwithnumberstoseethedataforadifferent sensor

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BrickDataLogging(Part2)

UploadIconSTEP7:ConnectyourrobotandclickontheUploadIconafteryouareinanExperiment.IntheDataLogFileManager,pickthecorrectfiletoimport.

STEP6:Picknameforthefileonthebrick

TheseiconsappearonlywhenyouareinanopenEXPERIMENT(notaProject)

ì Canyouthinkofotherexperiments?

ì Trydataloggingusingothersensors.

ì TryexportingyourdataintoExceloranotherspreadsheettool.

ì LearnhowtouseAutonomousDataLogginginPart2oftheDataLoggingseriesoflessons.

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NextSteps

ì ThistutorialwaswrittenbySanjaySeshan andArvindSeshanì Morelessonsatwww.ev3lessons.com

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Credits

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.