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()



__________________________

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.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIESOF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE ANDNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHTHOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISINGFROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OROTHER DEALINGS IN THE SOFTWARE.

To turn a S60 Python .py file into something installable (.SIS).. you can used Ensemble.

You need to install OpenSSL too, and put include it in your Path.

Then run ensemble and turn your .py into a .sis.
Include any permissions your SIS will need... like access to GPS and networks etc.
Then once you have a SIS file sign it using Symbian online open signing.. again with all permissions required.

Then install to phone.

NOTE... if Python is installed to C on your phone (Phone memory) then your SIS should be installed there too otherwise you may just get the appl flash up a blank white screen for a second then close again.

eg of syntax for all permissions you can get on Nokia N82 GPS camera phone.

D:\iArchive\mobiles>ensymble_python2.4-0.26.py py2sis --caps=LocalServices+Location+NetworkServices+PowerMgmt+ProtServ+R
eadUserData+SurroundingsDD+SWEvent+UserEnvironment+WriteUSerData+ReadDeviceData+TrustedUI+WriteDeviceData o:\GeogDatalog
ger.py o:\GeogDatalogger.sis


ensymble_python2.4-0.26.py: warning: no application version given, using 1.0.0
ensymble_python2.4-0.26.py: warning: no UID given, using auto-generated test UID 0xe72d1e27
ensymble_python2.4-0.26.py: warning: no certificate given, using insecure built-in one


Then sign the SIS using Symbian Open Signing online...