Help needed with uController and GPRS

EDAboard.com Forum Index -> Microcontrollers -> Help needed with uController and GPRS

Author

Message

sanjay

Joined: 04 Jul 2003
Posts: 117

11 Mar 2005 20:47 Help needed with uController and GPRS

Hello All,

I am not sure, if "Microcontroller" is the correct section to post this in but anyways,
I am a beginner in GPRS, I have looked into basic theory and set of AT commands and stuff that are required to work with it. I am trying to interface GPRS modem with a micro-controller say for instance ARM micro-controller for purpose of say sending/rcving data.

Going through documents and info from google, I imagine, I would be needing a TCP/IP stack support on the uController itself so that a dial up connection can be made (I hope my this theory is correct ? )

Have any of you played around with interfacing GPRS to a micro-controller ?
If you have, I would really appreciate if you could share your experiences + some documents that can guide on how to go about doing this. I did try googling for information, but couldn't get much help.

Regards

gidimiz

Joined: 03 Feb 2005
Posts: 428
Helped: 77

12 Mar 2005 0:00 Help needed with uController and GPRS

Hi,

I can help you, but:
1. I need more info on what type of mobile you are using and what type of GPRS it supports.
2. If you are interasted in only sending data then you can use the GPRS connection and thats all. The GPRS in most mobile has only PPP stack. you can use this stack to do diffren things.
3. To give you even a better answer, write down what you want to do, and i will do my best to answer.

Good luck.

glenjoy

Joined: 01 Jan 2004
Posts: 1028
Helped: 47
Location: Philippines

12 Mar 2005 5:37 Help needed with uController and GPRS

Search the GPRS gadget you have in google and look for its datasheet. for sure it has its AT commands in its datasheet or user's manual.

Google
AdSense
Google Adsense

12 Mar 2005 5:37 Ads

sanjay

Joined: 04 Jul 2003
Posts: 117

12 Mar 2005 11:21 Help needed with uController and GPRS

Hi gidimiz,

I am just intrested in sending data from microcontroller via GPRS to a remote PC (which will probably also have another GPRS modem)

I don't think, I am gonna use any mobile for this application, as the only purpose is to transfer data from uC to a PC via GPRS.

In some other forums, I saw people refer to using EasyGPRS and other modules that do the trick, has anyone tried them out ? Would any of you have documents that show interfacing uController to a GPRS for purposes of sending data ?

gidimiz

Joined: 03 Feb 2005
Posts: 428
Helped: 77

13 Mar 2005 12:07 Help needed with uController and GPRS

Hi sanjay,

No im sorry. Inever saw or used this EasyGPRS. I always used the GPRS that is integrated with the mobile phone. I think you should take that way becasue you can buy or even get for free a phone with GPRS and data connection.
I laos dont think you will have much problem in sending data to a PC from the MCU using the Mobile GPRS.

Let me know if you need anything else.

Good luck.

pisoiu

Joined: 31 Dec 2002
Posts: 729
Helped: 24
Location: Romania

13 Mar 2005 14:41 Help needed with uController and GPRS

Basically, any GPRS capable modem can perform raw data communication with a peer. In order to implement TCP/IP communication, you will have to implement in the microcontroller the PPP stack, which is not very complicated, but it is not easy if you have no experience with low level communication protocols. The EasyGPRS concept is a feature of the GM862-GPRS modem, produced by Telit ( www.gm862.com ). You will find there all the required documents. This particular modem have implemented the PPP stack in the microcontroller unit of the modem, and it is accesible with few AT commands. Basically, you have to declare the GPRS parameters (APN, username, password) and the socket parameters (timeouts, peer, protocol TCP or UDP), and with a single command ( AT#SKTOP ) you will open the socket and perform IP data communication. I am not 100% sure, but after my knowledge, this is a feature implemented only in Telit GPRS modem. I am not aware of other GPRS modems capable to work in this way. This implementation have some disadvantages, one for example is that you cannot open more than one socket at the same time.

/pisoiu

gidimiz

Joined: 03 Feb 2005
Posts: 428
Helped: 77

13 Mar 2005 21:24 Help needed with uController and GPRS

Hi,

I never knew that the GM862 can do that. I can tell you that the GR47 and the GR48 from Sony Ericson can do this things and even more. With the GR47 you can load your own code into the micro controler of the modem. I already did and still downing few porojects on this modem. The best thing is that you have UDP and TCP/IP and at the same time when you are receiving data via GPRS you can send SMS or receive one.
I didnt mention this before because most users here are using plain mobile, and no one will go out and buy a modem that needs to be interafaced and has its oen built power supply.
If you want more info on the GR47 let me know and i will try to find links on the net or post them here if i want find them.

feline694

Joined: 09 Oct 2007
Posts: 3

10 Oct 2007 4:54 Re: Help needed with uController and GPRS

Hi Gidimiz

I hope you can help me alot. I am using Sony-ericsson GR64, which has a builtinSIM-holder, TCP/IP stak, USB interface and support program code in it. But I want to use my MCU (ARM-7) with it to send some date to a remote PC where I have my web-site. pls., let me have a step by step procedure.

thaks/feline