Hi Miguel;
The GPS device is a hardware equipment; there is no OS; it can detect the GPRS
signals; it accepts commands and send NMEA frames (frames that contain the
geographic position od the device; speed, ..etc), collected from the
satellite...My problem is how to send commands to it via the GPRS network.
NB: I can send ommand through the serial port or the HyperTerminal...
Anyway; thank you for your time.
Miguel Montesinos [EMAIL PROTECTED] a écrit : Hi Dorra,
I don't know your requisites, but are you really sure you need to program
low-level GPRS communications?
I mean, if you have a device with a right set-up, it will automatically connect
to your GPRS/UMTS/HSDPA provider whenever any process needs an IP connection.
For instance in gvSIG Mobile, we use gnu.io to connect to a GPS through a
serial port, but we don't need to program any specific communications software
to access a remote WMS service. The device automatically starts-up the
connection when the application tries to reach an URL.
You can test this by openning your Internet browser in the device and typing
any URL. The device should try to connect automatically.
Does this help?
Cheers
-
Miguel Montesinos
Director Técnico
PRODEVELOP
C/ Conde Salvatierra, 34 - 10
46004 Valencia. Spain
e-mail: [EMAIL PROTECTED]
http://www.prodevelop.es
Tlf: +34 963510612
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of dorra labidi
Sent: Monday, April 14, 2008 11:22 AM
To: OSGeo Discussions
Subject: RE : RE: [OSGeo-Discuss] GPRS connection API
Hi Miguel, Thank you for your advice;
No problem for the OS; my Os is windows.
Do you think that the GPRS connexion depends on the GPS device?
The javax.comm.*, as far as I know, offer 3 connection types: serial,parallel
and using sockets.
In my case; I have two parameter for the connexion: the APN and the port
number. Perhaps, should I deal with the APN as an URL and the connexion will be
set up transparently?
Miguel Montesinos a écrit :
Hi,
Just one note. Javax.comm.* only runs on Solaris and Windows. If you need
Linux, Mac OS X, ... support, you'll need other plug-ins for original Sun
package.
Here you have one GPL project we're using at gvSIG[1]
I've not used AT commands and GPRS communications in Java, but have done in
C++. One advise: think in all possible problems, link failures, coverage
problems, ... They'll certainly happen ;-)
Regards
[1] http://www.rxtx.org/
-
Miguel Montesinos
Director Técnico
PRODEVELOP
C/ Conde Salvatierra, 34 - 10
46004 Valencia. Spain
e-mail: [EMAIL PROTECTED]
http://www.prodevelop.es
Tlf: +34 963510612
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Mateusz Loskot
Sent: Friday, April 11, 2008 1:44 PM
To: OSGeo Discussions
Subject: Re: [OSGeo-Discuss] GPRS connection API
dorra labidi wrote:
Hello all; I am developping a fleet management application
using java.
I need to connect to the GPS box using GPRS network.
My question: Is there a java API for the GPRS connection?
AFAIK, there is no dedicated GPRS API. Instead, you can use
Java Comm API [1] and issue AT commands to GPRS modem manually
to establish and control connection. After connection is
established, you can use sockets to exchange data.
That's the common solution I'm aware of.
[1] http://java.sun.com/products/javacomm/index.jsp
--
Mateusz Loskot
http://mateusz.loskot.net
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