Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Any idea howto do Ethernet to GSM/GPRS with Microchip

Status
Not open for further replies.

gidimiz

Advanced Member level 1
Joined
Feb 3, 2005
Messages
427
Helped
124
Reputation
248
Reaction score
40
Trophy points
1,308
Activity points
5,162
microchip gprs

Hi,

Here is an idea. Take the free TCP/IP stack from microchip. But at one end the new ENC28J60 Ethernet controller. Connect the PIC UART to a GSM modem and you will have an instant wireless internet conenction.
OK, so where is the problem. The problem is in the interface to the GSM modem, and the protocol that the GSM is using when connecting using the GPRS.
Any own has any idea what layer of the TCP stack is transfer.
How to convert the Ethernet side into the UART protocol.

The PIC18 from Microchip will do the job just fine, but how is the questions :D

Any idea?
 

pisoiu

Advanced Member level 3
Joined
Dec 31, 2002
Messages
750
Helped
43
Reputation
86
Reaction score
17
Trophy points
1,298
Location
Romania
Activity points
7,883
modem microchip

Almost all GPRS modems have TCP/IP stack built in, so your job is quite easy. You will have to transfer raw data, as they are offered by the TCP/IP stack from Microchip directly to the modem, and do the same for the other direction. Of course, you will have to manage the ethernet socket, and also the GPRS connection/GSM modem (configuration commands, dial commands, supervise the status of the modem and of the connection), and also you will have to implement some kind of flow control and data buffering, since the speeds used in these connections are at a big difference.

/pisoiu
 

    gidimiz

    Points: 2
    Helpful Answer Positive Rating

gidimiz

Advanced Member level 1
Joined
Feb 3, 2005
Messages
427
Helped
124
Reputation
248
Reaction score
40
Trophy points
1,308
Activity points
5,162
gsm + microchip

Hi Pisoiu,

You are correct. I know about this methode as i have already built few project with GPRS and i also write code to the internal software for the GR47.
But i want to use the modem witout the internal stack, there are few reasons for that. Either way, I want to iplament the stack by myself so i will have more control.
Any idea?

Thanks.
 

mahdiiii

Newbie level 3
Joined
Apr 20, 2011
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,299
hi, i'm a newbie :p i was thinking about the same project a c60 GPRS/GSM modem with wiz110SR serial to Ethernet converter (both ways) does that work?
 

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
48,521
Helped
14,273
Reputation
28,809
Reaction score
12,977
Trophy points
1,393
Location
Bochum, Germany
Activity points
280,613
Your suggestions for the ethernet interface as such are reasonable. If you review the original post and latest follow-up thoroughly, you'll realize that they apparently intend a wireless internet router. Althoug it's not completely impossible to implement it with a small PIC processor, even a PIC24 will suffer from limited memory space in this application. I would rather suggest to design a similar application on top of an OS that has the basic capabilities already built-in, e.g. Linux.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top