Weather Station Arduino and Processing

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Buildamobileorhomeweatherstationandgraphthedatainrealtimeonyourcomputer.Thegraphmapsoutwindspeed,pressure,temperature,andwinddirectionfor10minutesthensavestheimageasajpegandstartsover.

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AboutThisInstructable

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(/member/MonteH/)

MonteH(/member/MonteH/)

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WeatherstationArduinoandProcessing byMonteH(/member/MonteH/)

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Download(/id/WeatherstationArduinoandProcessing/?download=pdf) 6Steps

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WindMeters&Anemometers

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WindSpeedforhome,RV,portableTopquality,greatvaluesfrom$59

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Step1:Anemometerbuild

TheanemometerIbuiltwasbuiltwithmaterialsIhadonhand.IbasedthebuildaroundaDCmotorIhadthatspinsfreelywithlittleeffort.thediagramlistthepartsIused.

Step2:BMP085housing

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WeatherStation(http://www.instructables.com/id/WeatherStation1/?Arduinoweatherstation.(http://www.instructables.com/id/Arduinoweatherstation/?utm_source=pm&utm_medium=relatedinstructables&utm_campaign=related_test)RaspberryPiInternetWeatherStation(http://www.instructables.com/id/RaspberryPiInternetWeatherStation/?WirelessoutdoorArduinoweatherstationwithPCloggingandGraphs(http://www.instructables.com/id/WirelessoutdoorArduinoweatherWiredArduinoWeatherStation(http://www.instructables.com/id/WiredArduinoWeatherStation/?utm_source=pm&utm_medium=related

TheBMP085barometricpressuresensorusesI2CbustocommunicatewiththeArduino.WhenchoosingaBMP085breakoutboardthemainfeaturetolookforis5vcapabilityasthiswillbroadentherangeofpossibilitiesandsimplifywiring.Irecommendhttp://www.adafruit.com/products/391(http://www.adafruit.com/products/391).IusedCAT5etoconnecttheanemometerandsensortotheArduinoinmyvehicle.themaxdistanceyoucanrunI2ConCAT5ewireisabout25feet.fordistanceslongerthan25feetIwouldconsiderwireless.IpaintedtheCokecanwhitetocutdownthefalsetempreadingduringfullsun.

Step3:Arduinocode

#include#include//libraryavaliableatadafruit.com#include//libraryavaliableatadafruit.comAdafruit_BMP085bmp=Adafruit_BMP085(10085)intwSpeedintwDirectinttemp1intpress1intwsee

/**************************************************************************//*Arduinosetupfunction(automaticallycalledatstartup)*//**************************************************************************/voidsetup(void){Serial.begin(9600)

/*Initialisethesensor*/if(!bmp.begin()){/*TherewasaproblemdetectingtheBMP085...checkyourconnections*/

(http://cdn.instructables.com/FA2/C2VP/HKZAW3MR/FA2C2VPHKZAW3MR.LARGE.jpg)

Serial.print("Ooops,noBMP085detected...CheckyourwiringorI2CADDR!")while(1)}

}

voidloop(void){/*Getanewsensorevent*/sensors_event_teventbmp.getEvent(&event)wsee=analogRead(A0)wSpeed=map(wsee,0,1023,0,1534)//aftertestingthisgavemeaccuratewindspeedwDirect=analogRead(A1)//itwillbedifferentforyouranemometer

/*Displaytheresults(barometricpressureismeasureinhPa)*/if(event.pressure){/*DisplayatmosphericpressueinhPa*/press1=map(event.pressure,850,1100,0,1023)

/*Calculatingaltitudewithreasonableaccuracyrequirespressure**sealevelpressureforyourpositionatthemomentthedatais**converted,aswellastheambienttemperatureindegress**celcius.Ifyoudon'thavethesevalues,a'generic'valueof**1013.25hPacanbeused(definedasSENSORS_PRESSURE_SEALEVELHPA**insensors.h),butthisisn'tidealandwillgivevariable**resultsfromonedaytothenext.****YoucanusuallyfindthecurrentSLPvaluebylookingatweather**websitesorfromenvironmentalinformationcentersnearanymajor**airport.****Forexample,forParis,Franceyoucancheckthecurrentmean**pressureandsealevelat:http://bit.ly/16Au8ol*//*FirstwegetthecurrenttemperaturefromtheBMP085*/floattemperaturebmp.getTemperature(&temperature)temp1=map(temperature,30,55,0000,1023)}if(wSpeed99){Serial.print("0")//theseifstatementsadd0'stotheSerial.print(wSpeed)//leadingedgetocreateastringof}//16numberstosendovertheUSBelseif(wSpeed9){Serial.print("00")Serial.print(wSpeed)}elseif(wSpeed

Step5:Processingcode

importprocessing.serial.*PFontp

SerialmyPort//TheserialportintxPos=100//horizontalpositionofthegraph

voidsetup(){size(700,500)p=createFont("Arial",16,true)

background(0)//setbackgroundblackfor(intu=99u0t=t25)//loopcreateshorizontalgrid{stroke(100)line(99,t,width,t)}

textFont(p,12)//setfontsizeto12textAlign(LEFT)fill(255,0,0)//redtext("WindSpeedMPH",100,height25)//printwindspeedfill(0,255,0)//greentext("Barometricpressuremb",210,height25)fill(0,0,255)//bluetext("DegreesCelsius",355,height25)fill(255)//whitetext("WinddirectionN=0deg",460,height25)fill(100)//graytextAlign(RIGHT)text("0",110,height87)for(intm=160m0p=p50)//loopplacesnumbersonverticalgrideveryotherline{floatpat=map(p,400,0,0,200)intpati=int(pat)//changesfloatpattoanintfill(255,0,0)textAlign(RIGHT)text(pati,98,p+5)//windspeedmeasurementsfloatpatie=map(p,400,0,850,1100)intpaties=int(patie)fill(0,255,0)text(paties,75,p+5)//pressuremeasurementsfloatpatiesTemp=map(p,400,0,30,55)intpatiesTemp1=int(patiesTemp)fill(0,0,255)text(patiesTemp1,45,p+5)//tempmeasurementsfloatpatiesDirec=map(p,400,0,0,359)intpatiesDirect=int(patiesDirec)fill(255)text(patiesDirect,25,p+5)//winddirectionmeasurements

}

//Listalltheavailableserialportsprintln(Serial.list())//Iknowthatthefirstportintheseriallistonmymac//isalwaysmyArduino,soIopenSerial.list()[0].//Openwhateverportistheoneyou'reusing.myPort=newSerial(this,Serial.list()[0],9600)//don'tgenerateaserialEvent()unlessyougetanewlinecharacter:myPort.bufferUntil('\n')//setinitalbackground:

}voiddraw(){}

voidserialEvent(SerialmyPort){//gettheASCIIstring:StringinString=myPort.readStringUntil('\n')

StringxWindSpeed=inString.substring(0,4)StringxPressure=inString.substring(4,8)Stringxtemp=inString.substring(8,12)StringxWindDirect=inString.substring(12,16)intyWindSpeed=int(xWindSpeed)intyPressure=int(xPressure)intytemp=int(xtemp)intyWindDirect=int(xWindDirect)

floatWindSpeed=map(yWindSpeed,0,1023,height104,3)floatPressure=map(yPressure,0,1023,height104,3)floattemp=map(ytemp,0,1023,height104,3)floatWindDirect=map(yWindDirect,0,1023,height104,3)

stroke(255,0,0,150)line(xPos,WindSpeed+4,xPos,WindSpeed)

stroke(0,255,0,150)line(xPos,Pressure+4,xPos,Pressure)

stroke(0,0,255,150)line(xPos,temp+4,xPos,temp)

stroke(255,255,255,150)line(xPos,WindDirect+4,xPos,WindDirect)

xPos++

if(xPos>=width){//ifthegraphisfullsaveimageasjpegandstartoversaveFrame("Weather####.jpg")xPos=100p=createFont("Arial",16,true)

background(0)//setbackgroundblackfor(intu=99u0t=t25)//loopcreateshorizontalgrid{stroke(100)line(99,t,width,t)}

textFont(p,12)//setfontsizeto12

textAlign(LEFT)fill(255,0,0)//redtext("WindSpeedMPH",100,height25)//printwindspeedfill(0,255,0)//greentext("Barometricpressuremb",210,height25)fill(0,0,255)//bluetext("DegreesCelsius",355,height25)fill(255)//whitetext("WinddirectionN=0deg",460,height25)fill(100)//graytextAlign(RIGHT)text("0",110,height87)for(intm=160m0p=p50)//loopplacesnumbersonverticalgrideveryotherline{floatpat=map(p,400,0,0,200)intpati=int(pat)//changesfloatpattoanintfill(255,0,0)textAlign(RIGHT)text(pati,98,p+5)//windspeedmeasurementsfloatpatie=map(p,400,0,850,1100)intpaties=int(patie)fill(0,255,0)text(paties,75,p+5)//pressuremeasurementsfloatpatiesTemp=map(p,400,0,30,55)intpatiesTemp1=int(patiesTemp)fill(0,0,255)text(patiesTemp1,45,p+5)//tempmeasurementsfloatpatiesDirec=map(p,400,0,0,359)intpatiesDirect=int(patiesDirec)fill(255)text(patiesDirect,25,p+5)//winddirectionmeasurements

}if(xPos

Wehaveabenicecommentpolicy.Pleasebepositiveandconstructive.

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(/member/DemolisionWolf/)

11monthsago Reply

(/member/MonteH/)

1yearago Reply

(/member/ursm/)

1yearago Reply

Thewinddirectionsays0thewholetimebecausethewindvaneIbuiltdidnotworkproperlyandthisiswhyIchosenottogooverthebuild.Every10minthegraphissavedasjpgandcanbeaccessedthroughprocessingssketchfolder.thisgraphisthefirststormItestedmyequipmentinanditshowsthetempdropandthewindspeedincrease.

DemolisionWolf(/member/DemolisionWolf/)

Havingapictureofthedataisagreatidea,otherwiseit'salotofdatatostoresomewhere.

MonteH(/member/MonteH/)(author)

Myoriginalplanwastouseacompassmodule.https://www.sparkfun.com/products/7915.Thisruns$35andIwasnotwillingtopaythatsoImadeacontinuouspotwithagraphitebasedsemiconductorandcopperwipers.Ibuiltthepotontopofaharddrivemotor.Thewiperscreateddragandgreatlydecreasedsensitivity.

ursm(/member/ursm/)

hiMonteHduringreadingI'veexpectedthatthewindvanewasimpossibletoworkwithapotentiometer.thevanemustbeabletoturnfreelyaround360.forthatthetransmitionofthepositionshouldbeopticallyorbymagnets.havealookathttp://www.google.ch/imgres?imgurl=http://ginad.org.uk/weathergd/images/00vaneanglesoptical110207sml.png&imgrefurl=http://stargazerslounge.com/topic/161623arduinobasedweather

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station/&h=771&w=771&sz=190&tbnid=LzHDpgB00Hs9mM:&tbnh=84&tbnw=84&zoom=1&usg=__zfGV6bUICXhqeW5sQauRhw2FzrE=&docid=2Y73kq1jLyytUM&sa=X&ei=qecoUoXxGaGG4ASVp4C4Bw&ved=0CE8Q9QEwAg&dur=6854andhttp://forum.arduino.cc/index.php?topic=15994.0regards,urs

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