How to Configure GSM Modem Using AT commands in VC++

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Hello , i would like to communicate with gsm modem using AT commands in vc++ but i unable to do so.I tried in different ways but unable to read data.so please help me....its urgent.......thank you in advance.

Posted 17-Mar-11 2:04am

P S D

Updated 20-Mar-11 23:25pm

v2

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Rajesh Anuhya · Answer 1 · 2011-03-17T02:08:00

Solution 1

First you have to know about the serial communication in VC ++

Here[^]

Using the serial Port class/object you can send(commands)/receive(responses) from your modem.

Posted 17-Mar-11 2:08am

Rajesh Anuhya

Comments

P S D 18-Mar-11 0:55am

Hello sir,first of all i would thank for giving me response to my post.sir , i tried in many way but while reaading data it fails.....can you give me a code if possible....

Rajesh Anuhya 22-Mar-11 1:23am

Here is the code

http://www.codeproject.com/KB/system/serial.aspx

Du Sijun · Answer 2 · 2011-03-17T06:38:00

Solution 2

I suggest

1)test your gsm modem with serial port terminal first. Be familiar with baud rate,data bits, error checking...

2)some devices require set bit dtr (data transmit ready?)or rts (ready to send?) to true.

3)In some case you need to send "unsigned char"

Posted 17-Mar-11 6:38am

Du Sijun

Updated 17-Mar-11 6:40am

v3

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P S D 18-Mar-11 0:58am

Hello sir,first of all i would thank for giving me response to my post.Sir i tested my modem on hyperterminal and it is working fine....but through vc++ it is not....can you me a sample code which will connect to gsm modem through vc++...........

Du Sijun 18-Mar-11 3:22am

http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx

http://social.msdn.microsoft.com/Forums/en/netfxbcl/thread/6d47261b-27c6-45d4-8c02-81d1490011fd

Please check if it works.

I work around seiarl port with assembly,microcontroller,c#,vb,java but not try c++ yet.

P S D 18-Mar-11 5:57am

hello sir,In first link which system.dll we have to include.....if possible can you give me a program.........its urgent.....plz...

Du Sijun 18-Mar-11 6:01am

this may help:
http://www.codeproject.com/KB/system/serial.aspx

P S D 18-Mar-11 8:04am

Sir ,In above link there is a problem while reading data.....i tried but showing errors....i also made changes according to my databits,baud rate but still giving errors....plz help sir...