sir, i want assembly code for gsm module interfacing with 89c52 and gsm900 module are help me. i don't know c program. please help me sir.
Thanking you

@MARIAPRAKASH Post in forum.. we will help you.

sir can u please tell me here u used which type of gsm modem either sim300 or sim900 or sim900A.

@siddardha, it should work with any modem as SMS commands are as per GSM standard. In this project I think SIM900 is used.

thank you sir.can i use sim900A gsm modem.

i have wired the circuit as per the diagram, lcd used jhd 204a, insted of lm044.
iam not getting any message in the lcd display. can anybody help me

WIRED THE CIRCUIT AS PER CKT DIAGRAM,LCD USED JHD204A INSTED OF LM044L,CRYSTAL USED 11.0592MHZ. IAM NOT GETTING ANY MESSAGE IN THE LCD,CAN ANYBODY HELP ME

@pauly: Dont use caps.

LCD USED JHD204A INSTED OF LM044L

Both LCDs are same, It should work. Please use forum for help. Use post a question button

@siddardha, Yes you can use.

thank you @ajay_bhargav and how can i send message in proteus using virtual terminal and how many messages i can store and how i can access them please kindly help me.

@siddardha, You will need a real modem which connects to your PC serial port. and in proteus instead of using virtual terminal use COMPIM component which uses your PC serial port so you can talk to real world devices. If you need more help please post in forum.

Can i use this code for 16 X 2 LCD ????
I used AT89S52 controller... & SIM 300 GSM module...

This code uses 4 line LCD so addresses of line will change, you need to change it to use 2 line LCD.

Hello. i have problem when i try to compile the program. it said that #include<reg51.h> are missing. can u help me

@ASH13, This code is written for Keil. Make sure you're using the right compiler. If you face issue again, post your question in forum.

hello @ajay_bhargav , my project not working , i am using Arduino GPRS Shield ( http://www.geeetech.com/wiki/index.php/Arduino_GPRS_Shield ). plz help me

i am can't find the my Gsm sim900 TX & RX port , plz suggest me how to connect AT89c52 and GSM sim900 , i am successfully sent and received call/sms in my laptop with GSM SIM900 + Arduino V3 ATmega328P + Arduino default program, this is my gsm http://www.geeetech.com/wiki/index.php/Arduino_GPRS_Shieldn . this gsm is working ? without Arduino . and i am confused about ''Connect Max232 if your modem does not have TTL Connections " i don't know my gsm not have or have TTL Connections.

Thanks

@masharif46, I suggest you post in forum for any further question. At first look at the GPRS shield. It does have TTL connections. and even the wiki page says the same:
"The shield also has the 12 GPIOs, 2 PWMs and an ADC of the SIM900 module(They are all 2V8 logic) present onboard." Please if you have anymore question, post in forum.

plz suggest me , how to connect AT89c52 and GSM sim900 ?

i can run my project using this GPRS shield ?

@masharif46, Please use forum.

if my gsm have not TTL then how to Connect Max232 + gsm , plz give me cct .

how shall i connect gsm modem with microcontroller???? can i use tx rx of gsm modem directly???or there must have to use max232????

I want to send sms to user when smoke is detected I am using 8051 microcontroller and sim 300 gsm modem would you please help me assembly language coding. thank you

@worke Please post in forum for help.

I'm Olaloye Opeoluwa from Federal Polytechnic,
Ilaro, Ogun State,
Nigeria. I am an ND2 student of Computer
Engineering. I need someone
to design my project for me. Here is my topic. "GSM
SMART BASED
SCROLLING NOTICE BOARD".
Description. This is a project that works with a GSM
Modem, whereby a
message will b sent to the SIM card in d modem, and
the micro
controller will read it and send it to the notice board.
If there be any simple Project that you can assign for
me that won't
cost much, I'll really welcome and appreciate it.
Here's my contact. +2348165968570 +2348108599429.
BBM PIN:-2BF6816E.
I'll be looking forward to your favourable reply.
Thanks.
Yours Sincerely,
Olaloye Opeoluwa.

@Horpehdeprof Please post in forum. We will be happy to help you.

sir
i am using at89s52 and gsm300 modem . and above circuit . whenever i send msg from the same no store in array mb.no in code, or even from any no it displays msg from unknown as well as return msg msg from unknown number:() is received. nothing else is happening. kindly help me

sir i want to test my program so is there is need to use Gsm modem while running schematic on proteus

Sir
This code is very helpful to me.Thank you for sharing the project

Please send me the .asm code for notice board . I m going to b using 16x2 lcd, sim900 and 8051. I would be extremely grateful of ull can help me out.

Sir what is format of message

which mobile should i use in code, i have two sims one in my mobile and one in my modem thanks

hello all,
i have compiled and burn the hex into controller and all is ok i got welcome message, my problem here is how to use it . in the program there is a mobile number begining with 97 i replaced my mobile number with that, also in the program there is smsstring(mob_no) which mobile number should that be, my mobile number or the modem sim number. what message should be sent from mobile to modem i guese that should be any message to display on lcd.
my second request is how to use gsm modem with controller to control devices. thanks all

Sir, i try to register but cant..so i try asking question here..my gsm in simulation is okay but my hardware is a problem.when i sent message to gm module, i get feedback messaging saying that the memory phone is full, please call instead. any suggestion..also i try to register but the website say refer to admin..help me with both...10thanks in advance.
(gsm i using is sim900a made in australia, 89c51 and 16*2)

Sir can I use a 16x4 LCD display for the same code you have given here... And do we need to do any change in the coding as the sim number changes with respect to person