MARIAPRAKASH
08 Dec 2014: 14:38 PM
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
  
ajay_bhargav
10 Dec 2014: 04:53 AM
@MARIAPRAKASH Post in forum.. we will help you.
  
siddardha
08 Jan 2015: 13:52 PM
sir can u please tell me here u used which type of gsm modem either sim300 or sim900 or sim900A.
  
ajay_bhargav
09 Jan 2015: 05:07 AM
@siddardha, it should work with any modem as SMS commands are as per GSM standard. In this project I think SIM900 is used.
  
siddardha
09 Jan 2015: 12:43 PM
thank you sir.can i use sim900A gsm modem.
  
pauly
09 Jan 2015: 20:24 PM
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
  
pauly
09 Jan 2015: 20:43 PM
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
  
ajay_bhargav
12 Jan 2015: 05:18 AM
@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
  
ajay_bhargav
12 Jan 2015: 05:23 AM
@siddardha, Yes you can use.
  
siddardha
12 Jan 2015: 05:56 AM
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.
  
ajay_bhargav
15 Jan 2015: 05:00 AM
@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.
  
nirlep_EC
06 Feb 2015: 14:17 PM
Can i use this code for 16 X 2 LCD ????
I used AT89S52 controller... & SIM 300 GSM module...
  
ajay_bhargav
11 Feb 2015: 04:47 AM
This code uses 4 line LCD so addresses of line will change, you need to change it to use 2 line LCD.
  
ASH13
10 Mar 2015: 18:16 PM
Hello. i have problem when i try to compile the program. it said that #include<reg51.h> are missing. can u help me
  
ajay_bhargav
11 Mar 2015: 04:50 AM
@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.
  
sharif
08 Apr 2015: 06:05 AM
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
  
masharif46
09 Apr 2015: 05:06 AM
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
  
ajay_bhargav
10 Apr 2015: 18:18 PM
@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.
  
masharif46
10 Apr 2015: 18:32 PM
plz suggest me , how to connect AT89c52 and GSM sim900 ?
  
masharif46
10 Apr 2015: 18:42 PM
i can run my project using this GPRS shield ?
  
ajay_bhargav
15 Apr 2015: 09:18 AM
@masharif46, Please use forum.
  
masharif46
18 Apr 2015: 12:43 PM
if my gsm have not TTL then how to Connect Max232 + gsm , plz give me cct .
  
maarkailash
26 Apr 2015: 09:13 AM
how shall i connect gsm modem with microcontroller???? can i use tx rx of gsm modem directly???or there must have to use max232????
  
worke
10 Jun 2015: 04:05 AM
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
  
ajay_bhargav
19 Jun 2015: 04:29 AM
@worke Please post in forum for help.
  
Horpehdeprof
23 Jul 2015: 20:48 PM
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.
  
ajay_bhargav
27 Aug 2015: 07:10 AM
@Horpehdeprof Please post in forum. We will be happy to help you.
  
pardeep11
30 Oct 2015: 17:30 PM
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
  
sanju12345
04 Mar 2016: 07:48 AM
sir i want to test my program so is there is need to use Gsm modem while running schematic on proteus
  
Dilipkumar
11 Mar 2016: 18:40 PM
Sir
This code is very helpful to me.Thank you for sharing the project
  
jennifer
29 Mar 2016: 04:16 AM
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.

  
sanju1234
13 Apr 2016: 03:35 AM
Sir what is format of message
  
munlaiji
10 Dec 2016: 00:41 AM
which mobile should i use in code, i have two sims one in my mobile and one in my modem thanks
  
rodrider
10 Dec 2016: 11:13 AM
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
  
SHANE1996
11 Apr 2017: 15:53 PM
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)
  
Sudhansudeep
31 Aug 2018: 08:34 AM
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
  
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Conversation

ExperimenterUK
Thu Mar 14 2019, 08:44 PM
We don't send code,but you can ask for help in the 8051 forum
Thu Mar 14 2019, 11:00 AM
Jui Sanjay Kapare
Hello sir, I want code of interfacing DS18B20 with 8051.plz send the code as early as possible
ExperimenterUK
Mon Jan 07 2019, 03:31 AM
@REVOCATUS please post in the AVR forum
Mon Dec 24 2018, 09:25 AM
REVOCATUS MATEMU
sorry I mean referee boards for player substitution
Mon Dec 24 2018, 09:24 AM
REVOCATUS MATEMU
hi am.looking how to build referee by using Atmega 328 and its codes
Sat Dec 15 2018, 01:45 PM
Arslan ayoub
Hii ,, can I get the simulation of numeric keypad lock on proteus
ExperimenterUK
Mon Dec 03 2018, 05:17 PM
Please post questions in the forum. The chat box is for chat
Mon Dec 03 2018, 06:43 AM
help!me!
help! I don't understand busy flag!
Sun Dec 02 2018, 08:01 PM
ile
hello
Mon Nov 12 2018, 05:58 AM
Pavan_user
i have seen your replica of I2C programming using AT89C51 but i am unable to understand the "ack_bit" variable usage ...looks like it is always 1...can you elaborate how acknowledgment is working....

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