GSM MODEM with 8051

The way you're reading SMS is obviously not a good method and there are 90% chances of loosing an SMS.

Best way...
check for new message indication in interrupt itself.

e.g.

... Read Compelte post
Posted by ajay_bhargav on Thu Dec 02 2010, 03:42 PM

GSM Modem - Read SMS example using interrupts

//You need two variables and a constant, one for storing constant string,
//second for an index pointer and a buffer to store recieved data
unsigned char code Response[] = "+CMTI";
unsigned char MyBuff[15], i = 0;
//we can also have a flag for new message
bit NewMessage = 0;

//consider this ISR function
//assuming ch is read character from SBUF
if((ch == Response[i]) || (i >
 4)){
	//if receiv...  Read Compelte post 
Posted by ajay_bhargav on Tue Feb 05 2013, 09:10 AM

Conversation

Sarvn
Sat Jul 22 2017, 05:12 PM
I wnt to learn embedded could anyone help me
Sarvn
Sat Jul 22 2017, 05:11 PM
Hi
Wed Jul 12 2017, 02:34 PM
Ushiwaka
Any good guides on how to interface an 8255 w/ an 8051?
Tue Jul 11 2017, 06:22 PM
Chiko
i need seconds added to this circuit, can you help me modify it and add codes too
ExperimenterUK
Thu Jul 06 2017, 01:25 AM
@martinsnc115877 The hex file is here http://www.8051projects.net/forum-t65048-post.html
martinsnc115877
Sun Jul 02 2017, 04:28 PM
sir, sorry for the disturbance I can find the small and capital letter,hex file, please send it to me
Sun Jul 02 2017, 11:45 AM
Sam Raj
Can I have the circuit of Simple Digital Voltmeter using 8051
ExperimenterUK
Sun Jul 02 2017, 02:09 AM
Read this http://www.8051projects.net/forum-t65048-post.html. The project download contains lower case letters. It is compiled in Keil
martinsnc115877
Sat Jul 01 2017, 10:45 PM
I mean scrolling massage display using 8051 by pratrik suthar, the hex file I have is just only the capital letters I need the capital letters and the small letters hex, and I will like to no the compiler name he used for the code thanks
ExperimenterUK
Sat Jul 01 2017, 09:13 PM
@martinsnc115877 which project..link ?

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Sarvn
Sat Jul 22 2017, 11:34 AM
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Forum Activity
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Jul 20 2017, 04:08 PM
can it be possible ?? Alihaider.007No.You will nee...
Alihaider.007 Avatar
Posted By Alihaider.007
Thu Jul 20 2017, 03:14 PM
Sir I am using AT89S8253 I have trying to use this...
Utsavi Avatar
Posted By Utsavi
Mon Jul 17 2017, 09:57 AM
Hello Ajay_Bhargav,Thanks for your reply. Yes, you...
ajay_bhargav Avatar
Posted By ajay_bhargav
Mon Jul 17 2017, 06:41 AM
I do not think it would be a good idea to kind of ...
ajay_bhargav Avatar
Posted By ajay_bhargav
Mon Jul 17 2017, 06:32 AM
Tasking EDE has linker script facility available y...
Ramweit Avatar
Posted By Ramweit
Thu Jul 13 2017, 06:58 AM
Thank you for response,Sim300 gsm Modem am using h...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Jul 11 2017, 04:20 PM
After the SMS is sent the modem should respond+CMG...
Ramweit Avatar
Posted By Ramweit
Tue Jul 11 2017, 02:37 PM
From this code gsm modem sending SMS to mobiles mu...
ExperimenterUK Avatar
Posted By ExperimenterUK
Mon Jul 10 2017, 06:09 PM
@RamweitWhat is it you want to know ?
Ramweit Avatar
Posted By Ramweit
Sat Jul 08 2017, 02:12 PM
#include<reg51.h>#include<stdio.h>bit moreov...