[OSGeo-Discuss] GPRS connection API

Mon Apr 14 07:18:40 PDT 2008

Hello again,

if you can send commands to the GPS receiver through the serial port, then you can program an access from your application in the same way.

You can use javax.comm.* or gnu.io to get access to serial ports. Once you have that, it's up to you to communicate with the receiver. I don't see the needing to access through GPRS.

FYI, you can have a look at the wource code of gvSIG Mobile [1]. It uses GpsTools (which depends on gnu.io for serial access) for managing communication with the GPS (NMEA parsing, ...). You can look for it at the libGPS library.

If I'm missing sg. don't hesitate to keep on asking.

Regards

[1] http://www.gvsig.gva.es/index.php?id=piloto-gvsig&L=2

---------------------------------

Miguel Montesinos

Director Técnico

PRODEVELOP

C/ Conde Salvatierra, 34 - 10

46004 Valencia. Spain

e-mail: mmontesinos at prodevelop.es

http://www.prodevelop.es

Tlf: +34 963510612

________________________________

	From: discuss-bounces at lists.osgeo.org [mailto:discuss-bounces at lists.osgeo.org] On Behalf Of dorra labidi
	Sent: Monday, April 14, 2008 3:49 PM
	To: OSGeo Discussions
	Subject: RE : RE: RE : RE: [OSGeo-Discuss] GPRS connection API

	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 <mmontesinos at prodevelop.es> 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: mmontesinos at prodevelop.es

		http://www.prodevelop.es

		Tlf: +34 963510612

		________________________________

		From: discuss-bounces at lists.osgeo.org [mailto:discuss-bounces at lists.osgeo.org] 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: mmontesinos at prodevelop.es
		http://www.prodevelop.es
		Tlf: +34 963510612

		>-----Original Message-----
		>From: discuss-bounces at lists.osgeo.org 
		>[mailto:discuss-bounces at lists.osgeo.org] 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
		>_______________________________________________
		>Discuss mailing list
		>Discuss at lists.osgeo.org
		>http://lists.osgeo.org/mailman/listinfo/discuss
		>
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