Help in Gsm module

[Tina]

Hello guys and girls (I hope i’m not the only girl )

 

My name is Tina and i’m new at Engineers Garage and to electronics as well. I spent a lot of time reading all these articles you post and i want to say that your work is the best.

My question now. I have a cottage really far from me and i want to built a module in order to notify me in case of intruder. More details, i want a Gsm kit that will call me on my mobile phone in case it detects any noise. I bought from Internet a Chinese bug but it never worked on. Is there anyone who has built smting similar in order to guide me?

 

Thank you in advance,

Tina

[AJISH ALFRED]

Hi,

This is not such a big deal. You can use an IR sensor to sense any intrusion and send a warning message or call to a predefined mobile number.

But there are certain things which you should consider.

Basically your project should work 24*7 without any failure. Continuous power supply, stability of the controller which you choose, and the stability of the code, sensor performance etc. will be having significant effect. There should not be false triggering also.

 

What you meant by that “Chinese bug”? Is that any hardware?

 

Anyway, choose a MCU, GSM module, sensor which you like. Design the sensing circuit first. Then try to interface the GSM module. There are lot of examples for GSM interfacing in engineers garage, which I hope you’ve already found.

 

You can start the project and update your doubts here. Surely you will get a lot of help.

All the best

[Amrith]

Hi Tina,

To get started, refer tutorials from Engineers garage & post you experiaence, doubts to resolve.

All the best !!! 

[Tina]

Thank you for your replies,

 

I saw Simcom GSM/GPRS/GPS Module (SIM548C) which has Dual analog audio interface. So i think i can attach a microphone on this. Do you know any other GSM module where i can add a microphone? i found on internet a picture of smth similar with my case but i don’t know how to upload in order to see it 

[Amrith]

Hi Tina,

You can try SIMADO GFX11 modem for audio.

[Vikrant Negi]

hi,

 

Read this post about GSM module.

Hope it would help.

http://www.engineersgarage.com/articles/gsm-gprs-modules

[umar farrok]

better u use pir sensor with gsm sim 300 or gsm sim 900 module for your concept

[Anant Pawar]

hello,

 i have fly900 gsm module.

previously  it was working properly but now it shows error means it shows number of smileys and symbols wen it is connected to hypertrerminal.

it is nt stoping untill power supply is turn off of the gsm modem. and its not accepting any AT commands….

pls help me to come out of this…..as soons as possible

[Anant Pawar]

hi…

i have purchased fly900 gsm module.

previously it was working well..but now when i connect it to hyperterminal it is not accepting AT commands..

it respionses countinuosly some smileys,shapes etc. not stopping…

help me to come out of this problem..

 

 

[AJISH ALFRED]

Hi Anwar,

Try with baud rates 9600 and 4800. Check the connections and also check the power adaptor you are using for the gsm module.

[Anant Pawar]

this is my code for atmega8….its not working..

 help me..where to edit code…

 

this code is transmitting commands to hyperterminal but not working with mcu

 

#include<avr/io.h> //This is the header for AVR Microcontroller
#define F_CPU 12000000
#include<util/delay.h>
#include”uart.h”  //header file to program uart

int main(void)
 {DDRC=0x00;PORTC=0x0f;DDRB=0x0f;
  uart_init();  //initialisation of uart
  while(1)
  {if((PINC&0x0f)==0x0f)
   {PORTB=0x0f;}
   else{
   PORTB=0x03;
   _delay_ms(6000);
   uart_string(“ATr”); //function to pass a string
   _delay_ms(2000);
   uart_string(“ATE0r”); //function to pass a string
   _delay_ms(2000);
   uart_string(“AT+CMGF=1r”); //function to pass a string
   _delay_ms(2000);
   uart_string(“AT+CMGS=”+91**********”r”); //function to pass a string
   _delay_ms(2000);
     uart_string(“op is ok”);
 _delay_ms(5000);
  uart_char(0x1a);
  _delay_ms(6000);
  }
 }}

 

rly soon..plz

[AJISH ALFRED]

Hi Anant,

Have you fixed that problem with your GSM modem? Send the same commands from hyperterminal to GSM modem and see whether it is able to send a message or not.

Connect the GSM module to the microcontroller only after 3 to 4 once it is turned on.

 

The first step is to figure out whether the problem is in your code or with the hardware.

[Author]

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