Help me please for my project.

hello my friends,maybe this is sound crazy but i need all of your help.
Currently I am doing my project to control power on/off via sms. I am using Siemens C55 and AT89S52 and the dateline is on Thrusday
and now I have some problem how to read the sms from the microcontroller.
For example, how if I send LAMP ON, there will be replied LAMP IS ON.
I am using C language with Keil compiler, and Crystal 11,0592 MHz.
Please help me.
Thank you.

You can refer GSM notice board project for this which is published in home page.
still if you find any issue let us know.

check this:
http://www.8051projects.net/download-d248-gsm-notice-board.html

hi, thanks for the reply kirangowle and ajay.
I already download it and try to understand.hopefully i can make it.
but I see an unfamiliar command here,what is AT+CNMI=2,1,0,0,0\r ?
can you explain how it works and the meaning of 2,1,0,0\r?
thank you

hi ajay and kirangowle.
I just look up in the internet that CNMI is need to display the message right?
so the message will showed up in the LCD?
since I don't use any LCD i dont need CNMI right?

hi ajay and kirangowle.
I just look up in the internet that CNMI is need to display the message right?
so the message will showed up in the LCD?
since I don't use any LCD i dont need CNMI right?

9780id

The CNMI command is not about the LCD it is about receiving sms messages.

You are not displaying the message, but you still need to read it,or be aware that
it has arrived.

AT+CNMI is tor notify that new msg has arrived. You need this to read always the latest msg.

hi ajay and kirangowle.
I just look up in the internet that CNMI is need to display the message right?
so the message will showed up in the LCD?
since I don't use any LCD i dont need CNMI right?

9780id

The CNMI command is not about the LCD it is about receiving sms messages.

You are not displaying the message, but you still need to read it,or be aware that
it has arrived.

ExperimenterUK

I see then,it is always like that?
I mean always AT+CNMI=2,0,0,0\r?
what does it mean?

CNMI = New Message Indication

Download AT Command manual and look at its description. A simple google search would have helped.

thanks for the reply ajay,now i trying my best to finish it by 5 pm today!!
I have some difficulties here,where to put send and read sms?

if(strncmp(message,"LAMP ON",7)==0)
	    {	 
			
	   		lamp=ON;
			D1Status=1;
			tx_string("AT+CMGS=\"");
			tx_string(phone_num);
	   		tx_data('\"'); 
	   		tx_data('\r');
	   		while(rx_data()!='
			tx_string("device 1 turned on");
	   		tx_data(0x1A);  // ctrl-z is 0x1A
		}

		else if(strncmp(message,"LAMP OFF",8)==0)
	    {	 
	   		
			lamp=OFF;
			D1Status=0;
			tx_string("AT+CMGS=\"");
	   		tx_string(phone_num);
	   		tx_data('\"'); 
	   		tx_data('\r');
	   		while(rx_data()!='>
');
			tx_string("device 1 turned off");
	   		tx_data(0x1A);  // ctrl-z is 0x1A
		}

is my code already right?
where i should put it?