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gprs modem interface proceduer

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simcom new provider

Please anybody have a SIM300D project or code to connect as web client
 

gsm-900 and gsm-1800 decode

Hi everyone,

just one question: Is there any sense for implementing PIC microcontrollers in projects concerning SIM300 (especially GPRS)? (in aspects of speed needed for proper function)

Thnx

Added after 1 hours 38 minutes:

I'm trying to form a simple communication (over gprs) PC->mobile phone and vice versa.
 

gsm wavecom modules

Hi,

We are developing a product which requires us to use a GSM component
on our PCB board.
But as the cost of GSM component is high we are evaluating different options.
One option would be to use the GSM chipset used in the mobile phone
boards which we thought would cost less than the GSM component.

These are the pins currently we are using from GSM module
1) Rx and TX line from GSM for sending and receiving the AT Commands
2) RI to indicate the incoming call or SMS (Ring Indicator)
3) Service Led
4) Audio In and Out in build\t
5) RF section to connect direct antenna


Please let me know if this option(using GSM chipset used in low cost mobiles) for our product is vaiable
Also let me know anyone who can source this kind of GSM chipset.
We would be requiring in large quantities( between half a million to
one million)

Thanks
Shekhar
 

atdt 97 modem

Hello all,

I am looking for a cheap GPRS module with TCP/IP stack.
Is there any provider or supplier?? i want it as soon as possible ?
Reply me fast.. thanks..
 

datasheet of gsm modem by simcom

sir,
i am doing the project in LPG gas detecting system,so some broplem in my circuit.how iam give 5v in micro controller

Added after 5 minutes:

just one question: Is there any sense for implementing PIC microcontrollers in projects concerning 16*2 lcd display,how to interface,replay fast [satheshbit@gmail.com]
 

at+cstt not supported wavecom

jagrut911 said:
Hello all,

I am looking for a cheap GPRS module with TCP/IP stack.
Is there any provider or supplier?? i want it as soon as possible ?
Reply me fast.. thanks..
Click to expand...

I'd recommend the SIM300D (tri-band) or SIM340D (quad-band)
 

china gsm module datasheet

One thing to remember about this is that any end design that has a cellular modem in it will need to be PTCRB certified, which can cost $20,000+.

There is a product from Janus that is certified as an end product, but can be developed on just like a GSM module: **broken link removed**

It is mainly used for proof of concept, but I've seen many engineers go with this solution long term. You can always spin a board later, when you are ready tos hell out the cash for certification.

-B
 
Last edited by a moderator:

I would recommend you to use IWOW - TR-900 or TR-800.

**broken link removed**
 
Last edited by a moderator:

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**broken link removed**
 
Last edited by a moderator:

Re: price of simcom gsm modem

plz help..
Hello Friends , i just want to link to any website address by its name like www.google.com www.yahoo.com, www.matlab.com
i have already gone through different at commands , i am able to send data using vodafone India Sim, but fixed address, and commands are,,
Code: 
AT+CGATT=1
AT&D1
AT+CGDCONT=1,"IP","portalnmms"
AT+CSTT="portalnmms","username","password"
AT+CDNSORIP=0
AT+CIICR ( Results in "Ok" )
AT+CIFSR ( Results in an ip xxx.xxx.xxx.xxx )

at+cipstart="TCP","10.10.1.100","9401"
( is this IP address remain fixed or has to change with IP address of site that i wants to link. and PORT address ?)
OK
at+cipsend
>data to send,,
ΛZ
Sent Ok
AT
OK
AT+CGATT=1
OK
AT&D1
OK
AT+CGDCONT=1,"IP","spice"
OK
AT+CSTT="spice"
OK
AT+CDNSORIP=0
OK
AT+CIICR
OK
AT+CIFSR
10.64.48.132
AT+CIPSTART="TCP","10.11.12.13","9401"
OK
CONNECT OK
AT+CIPSEND
> GET http://google.com
SEND OK

at+cipsend
> get http://www.google.com
SEND OK

at+cipshut
SHUT OK



All is fine but i am not able to understand what should i write in
command
{AT+CIPSTART="TCP","10.11.12.13","9401"}
rather than "10.11.12.13" it is address for spice
and port number for spice port 9401

is this the address for page we wants to open or what?
How can i link a page like :
Code: 
www.google.com
"www.eespl.com"
please help me i am stuck in this stuff from last one week.
I am new to at commands for GPRS .. ,
what if there is a reply from modem , http: service not available.,Question
and i also receive data from, server as in this case..

Code: 
at+cipshut
at+cipstart="tcp","10.10.1.100","9401"
> put http://www.google.com
SEND OK

RECV FROM:10.10.1.100:9401
+IPD187:HTTP/1.0 503 Service Unavailable
Content-Type: text/vnd.wap.wml
Proxy-Connection: close

<wml><card id="error" title="Error">

Service Unavailable, Please try later</p
></card></wml>
CLOSED
 
Last edited by a moderator:

Re: price of simcom gsm modem

imcoolmann4u said:
Code: 
How can i link a page like :www.google.com
"www.eespl.com"
Click to expand...
Before sending the "AT+CIPSTART='TCP','www.google.com','80'" command, send "AT+CDNSORIP=0". This tells the module that you will be using a Domain Name instead of a fixed IP address.

imcoolmann4u said:
what if there is a reply from modem , http: service not available.,Question
and i also receive data from, server as in this case..

Code: 
at+cipshut
at+cipstart="tcp","10.10.1.100","9401"
> put https://www.google.com
SEND OK

RECV FROM:10.10.1.100:9401
+IPD187:HTTP/1.0 503 Service Unavailable
Content-Type: text/vnd.wap.wml
Proxy-Connection: close

<wml><card id="error" title="Error">

Service Unavailable, Please try later</p
></card></wml>
CLOSED
Click to expand...
You're sending a 'PUT' request to the server, which is probably doesn't support.
 
Last edited by a moderator:

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