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bercam4
Guest
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| GPRS modem gr47 |
 Posted: Mon Sep 13, 2004 5:48 am |
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| anyone has worked with it? |
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bercam4
Guest
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| Posted: Mon Sep 13, 2004 5:50 am |
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| Exactly is a GSM/GPRS modem from SonyEricsson and it is programmable by AT Comands |
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ckielstra
Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands
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| Posted: Mon Sep 13, 2004 7:26 am |
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| Seems like a nice module to me. We have looked into using it but decided on using the Wavecom Integra M2106B instead because with the Wavecom module you can order an integrated TCP/IP stack without additional costs and the Wavecom is a bit faster in the upload (4+2 device instead of 4+1). |
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bercam4
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| programming |
| Posted: Thu Sep 16, 2004 2:35 am |
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I'm using GR47 device, wich contains a TCP/IP stack.
Are you using to send data by GPRS to IP address?
Do you know another forum to learn more about AT comands in GPRS modems?
Regards |
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ckielstra
Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands
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| Posted: Thu Sep 16, 2004 2:45 am |
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| Quote: | | Are you using to send data by GPRS to IP address? |
Yes. My application is something like a GPRS-enabled datalogger, we receive data over RS-232 and store this in a MMC-flash card. Depending on the customer requirements collected data reports are send every minute to once a day to a pre-defined ip-address.
| Quote: | | Do you know another forum to learn more about AT comands in GPRS modems? |
No, I only used the Wavecom manuals and that was sufficient for me. |
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bercam4
Guest
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| GPRS |
| Posted: Fri Sep 17, 2004 2:47 am |
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Did you had any problem with your IP security ?
What software are you using to read data in host from IP? Are you using sockects to implement this?
Thanks you for your help. |
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ckielstra
Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands
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| Posted: Fri Sep 17, 2004 3:12 am |
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| Quote: | | Did you had any problem with your IP security ? |
This question is too general to give a more specific answer to. But, no, not yet any problems with IP security. At the host we have a firewall running only allowing the pre-defined port numbers and we can make it even tighther by only allowing the ip-range of our GPRS provider.
| Quote: | | What software are you using to read data in host from IP? |
The protocol is our own development so we had to develop our own host as well. An advantage of this is that security is much easier as well, as no hacker will know the protocol (at least in the beginning of our project).
| Quote: | | Are you using sockects to implement this? |
Yes. Sorry, I don't understand why you ask this question. Sockets instead of what other solution you are thinking of?[/quote] |
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bercam4
Guest
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| GPRS modem gr47 |
| Posted: Mon Sep 20, 2004 3:16 am |
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Your explanations are very appreciated for me.
I'm making the PCB and learning about AT comands in order to program the module with PIC18.
I'm working in telemetry project and I'm thinking about two posiblities,
1.- Using SMS with Emitter and receiver.
2.- If amount data is bigger using GPRS to IP address.
I'm hardware engineer and I have experience only with Visual Basic-C as PC programs. I know about sockect to connect to another IP. |
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