Nokia N82 Python DataLogger Code (audio, image, GPS)

Python code for Nokia N82 phone to record the GPS location, Cell ID, and an image from front camera every 3 seconds. It also records a sound file continuously and records the playhead position into the log file to ensure a tightly coupled link between audio and location data.


You will to ceate a "datalogger" folder on your phone's micro-SD card before using the application for the first occasion. This can be done while the phone is connected to a PC.

Code used in FOSS4G academic paper => http://2009.foss4g.org/researchpapers/#researchpaper_3

(Code is availale for use in your project under MIT Licence)

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import e32, appuifw, graphics
import key_codes
import positioning
import sensor
import location
import audio
import sysinfo
import camera
import time
import audio

counter =0

def handle_redraw(rect):
canvas.clear()
canvas.blit(img)


def startrecording():
global S
global counter
t=int(time.time())
filename="e:\\datalogger\\snd_"+str(t)+".wav"
S=audio.Sound.open(filename)
S.record()
img.point ((10,20),0xff0000,width=20)
handle_redraw(())

def stoprecording():
global S
S.stop()
S.close()



def fncSavedata (data):
io=open("e:\\datalogger\\gps_travel.log",'a')
io.write(data +'\n')
io.close
return


def cb(event):

global counter
counter = counter + 1

t=int(time.time())
sat=event["satellites"]
tm=sat["time"]
tot=sat["satellites"]
used=sat["used_satellites"]
pos = event["position"]
lat=pos["latitude"]
lng=pos["longitude"]
alt=pos["altitude"]
vdop=pos["vertical_accuracy"]
hdop=pos["horizontal_accuracy"]
crse=event["course"]
hdg=crse["heading"]
hdgacc=crse["heading_accuracy"]
spd=crse["speed"]

sdb=sysinfo.signal_dbm()
loc = location.gsm_location()
sloc = str(loc)
sloc = sloc.replace(',','/')

global S
sndtime=int(S.current_position() /1000)

s = "gps:"+str(t)+","+str(sndtime)+','+str(tm)+","+str(tot)+"," +str(used)+","+str(lat)+","+str(lng)+ "," + str(alt)
s = s +"," + str(vdop) + "," + str(hdop) + "," + str(hdg) + "," + str(hdgacc) + "," + str(spd) + "gsm:"+str(sloc)+","+str(sdb)
fncSavedata(s)

pic=camera.take_photo('RGB',(320,240),0,'none','auto','auto',1)
sp="e:\\datalogger\\pic" + str(t) + '.jpg'
pic.save(sp)


img.clear()
img.text((40,34),u'Log ID: ' + str(counter),0xff0000,font='normal')
img.text((40,64),u'Sats: ' + str(used) + "/" + str(tot) ,0xff0000,font='normal')
img.text((40,94),u'Spd: ' + str(int(spd)),0xff0000,font='normal')
img.text((40,124),u'Snd: ' + str(sndtime),0xff0000,font='normal')
handle_redraw(())


canvas = appuifw.Canvas(event_callback = None)
appuifw.app.body = canvas
appuifw.app.title = u"Data logger"
w,h = canvas.size
img=graphics.Image.new((w,h))

startrecording()

positioning.set_requestors([{"type":"service","format":"application","data":"test_app"}])
positioning.select_module(270526860)
positioning.position(course=1,satellites=1,callback=cb,interval=1000000,partial=1)

app_lock = e32.Ao_lock()
app_lock.wait()

stoprecording()



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Copyright (c) 2009 GRCNZ,University of Canterbury Geog Dept
Permission is hereby granted, free of charge, to any personobtaining a copy of this software and associated documentationfiles (the "Software"), to deal in the Software withoutrestriction, including without limitation the rights to use,copy, modify, merge, publish, distribute, sublicense, and/or sellcopies of the Software, and to permit persons to whom theSoftware is furnished to do so, subject to the followingconditions:
The above copyright notice and this permission notice shall beincluded in all copies or substantial portions of the Software.

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