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read cellID from N900 using python?

anyone have some python code which will allow me to pull the currently connected cell ID?

I want to be able to use this value to query an open cell database to get a rough location of the user (for when indoors/gps not working, etc)

thanks.

Re: read cellID from N900 using python?

http://talk.maemo.org/showthread.php?p=386188 showed how to do it in C. I know you requested for Python specifically, but I don't know python-dbus and I think python-osso won't help here, either, as the Cell ID is not the first thing returned...

Re: read cellID from N900 using python?

@hypnotik:

and here you have an example of using DBus in Python (this one is for WLAN scanning):

http://slexy.org/view/s25h3to4Rr

Re: read cellID from N900 using python?

Thanks qwerty12, hopbeat for the examples. I'll give a go.

Re: read cellID from N900 using python?

Quote:

Originally Posted by hopbeat (Post 427799)

@hypnotik:

and here you have an example of using DBus in Python (this one is for WLAN scanning):

http://slexy.org/view/s25h3to4Rr

Is there a point of reference for dbus for querying the GSM stack to read the Cell Tower ID?
I'm assuming I need to modify com.nokia.wlancond.signal to something else?

EDIT: Ok, this is slowly starting to make sense now...

qwerty12's post here shows the code for reading cellID. I just need to adapt it somehow to python.

http://talk.maemo.org/showpost.php?p=385947&postcount=2

Re: read cellID from N900 using python?

Hmm.. I give up on this. Tried to adapt the code from qwerty12 into hopbeats' but I'm doing something wrong.

Code:

from dbus.glib import *

import gobject

import dbus

import array



loop=None



def scan_results(*args):

    loop.quit()



if __name__ ==  "__main__":



        #mandatory to receive dbus signal

        loop=gobject.MainLoop()

        bus = dbus.SystemBus()

        wlancond = bus.get_object('com.nokia.phone.net', '/com/nokia/phone/net')

        request = dbus.Interface(wlancond, 'Phone.Net')

        bus.add_signal_receiver(scan_results, dbus_interface="Phone.Net.get_registration_status", signal_name="get_registration_status")

        request.get_cell_id(dbus.Int32(4), dbus.ByteArray([]), dbus.Int32(2))

        loop.run()

All I get is:

Code:

ERROR:dbus.proxies:Introspect error on :1.16:/com/nokia/phone/net: dbus.exceptions.DBusException: rpc.Error: object /com/nokia/phone/net doesn't have interface org.freedesktop.DBus.Introspectable

Traceback (most recent call last):

  File "test2.py", line 31, in <module>

    request.get_cell_id(dbus.Int32(4), dbus.ByteArray([]), dbus.Int32(2))

  File "/usr/lib/pymodules/python2.5/dbus/proxies.py", line 68, in __call__

    return self._proxy_method(*args, **keywords)

  File "/usr/lib/pymodules/python2.5/dbus/proxies.py", line 140, in __call__

    **keywords)

  File "/usr/lib/pymodules/python2.5/dbus/connection.py", line 622, in call_blocking

    message, timeout)

dbus.exceptions.DBusException: rpc.Error: can't find method Phone.Net::get_cell_id

Will have to revisit this later.

Re: read cellID from N900 using python?

I wanted to try, python-dbus, I really did... But you turned out to be a piece of **** that can't do this correctly. So I cheated:

File.c:

Code:

#include <glib.h>

#include <dbus/dbus-glib.h>



#define PHONE_NET_DBUS_NAME  "com.nokia.phone.net"

#define PHONE_NET_DBUS_IFACE "Phone.Net"

#define PHONE_NET_DBUS_PATH  "/com/nokia/phone/net"

#define PHONE_NET_REGISTRATION_METHOD  "get_registration_status"



guint get_cell_id (void)

{

  DBusGConnection *connection;

  DBusGProxy *proxy;

  GError *error = NULL;

  guchar status, network_type, supported_services;

  guint lac, cell_id, operator_code, country_code;

  gint net_err;



  g_type_init();



  connection = dbus_g_bus_get(DBUS_BUS_SYSTEM, &error);

  if (!connection)

  {

    g_printerr("Failed to open connection to system bus: %s\n", error->message);

    g_clear_error(&error);

    return 0;

  }

  proxy = dbus_g_proxy_new_for_name(connection, PHONE_NET_DBUS_NAME, PHONE_NET_DBUS_PATH, PHONE_NET_DBUS_IFACE);



  if (!dbus_g_proxy_call(proxy, PHONE_NET_REGISTRATION_METHOD, &error, G_TYPE_INVALID, G_TYPE_UCHAR, &status, G_TYPE_UINT, &lac, G_TYPE_UINT, &cell_id, G_TYPE_UINT, &operator_code, G_TYPE_UINT, &country_code, G_TYPE_UCHAR, &network_type, G_TYPE_UCHAR, &supported_services, G_TYPE_INT, &net_err, G_TYPE_INVALID))

  {

    if (error->domain == DBUS_GERROR && error->code == DBUS_GERROR_REMOTE_EXCEPTION)

      g_printerr("Caught remote method exception %s: %s", dbus_g_error_get_name(error), error->message);

    else

      g_printerr("Failed to call method: %s\n", error->message);

    g_clear_error(&error);

    return 0;

  }



  g_object_unref(proxy);

  dbus_g_connection_unref(connection);



  return cell_id;

}

gcc -Wall --shared File.c -o weed.so `pkg-config --cflags --libs glib-2.0 dbus-glib-1

File.py:

Code:

from ctypes import *



weed = CDLL("/sdk/weed.so")

crack = weed.get_cell_id(None)

print "%d" % crack

Which leaves me with the Cell ID number. I know, I know, using ctypes is not a proper solution but python-dbus sucks so bad...

Re: read cellID from N900 using python?

Not quite what hypnotik wants, but here's a script I'm using to log cell ID changes, hopefully it'll help:

Code:

#!/usr/bin/env python



import sys

import traceback

import gobject

import dbus

import dbus.mainloop.glib



def cell_signal_handler(*args):

    print "%s,%s,%s" % (args[4], args[3], args[2])

    

if __name__ == '__main__':

    dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)

    bus = dbus.SystemBus()

    bus.add_signal_receiver(cell_signal_handler, dbus_interface = "Phone.Net", signal_name = "registration_status_change")

    bus.add_signal_receiver(cell_signal_handler, dbus_interface = "Phone.Net", signal_name = "cell_info_change")



    loop = gobject.MainLoop()

    loop.run()

Re: read cellID from N900 using python?

Quote:

Originally Posted by hypnotik (Post 427773)

I want to be able to use this value to query an open cell database to get a rough location of the user (for when indoors/gps not working, etc)

I don't know for sure, but I was under the impression that the built-in liblocation would do this for you, rather than it needing to be implemented in each app - is that not the case?

Re: read cellID from N900 using python?

Quote:

Originally Posted by ewan (Post 428651)

I don't know for sure, but I was under the impression that the built-in liblocation would do this for you, rather than it needing to be implemented in each app - is that not the case?

That's right. Have a look here. Further it is always better in terms of stability of the API to use the high-level APIs if it exists.

Daniel