Interfacing microcontroller and gsm modem

F

fubuaks

New Member

• Sep 5, 2009

• #1

Hi....
I need to send some AT commands along with a message, to send an sms, to a GSM modem through a micro controller as a part of my BE project. I dont have much knowledge of a GSM modem. Which one should I use...?
I know that uc and the modem are interfaced through a serial port but how do i send the command and what are the actual connections......???

 

gaspode42

Member

• Sep 5, 2009

• #2

Have a look at Telit they make a number of modules.
You will find the AT commands required on their site

 

F

fubuaks

New Member

• Sep 6, 2009

• #3

I know the AT commands.....but how do i send them to the modem from a microcontroller........and which micro controller shud i use......???

 

R

rushi53

Member

• Sep 6, 2009

• #4

fubuaks said:

I know the AT commands.....but how do i send them to the modem from a microcontroller........and which micro controller shud i use......???

Click to expand...

You can use 89c51/89s51
But you can not use any mobile, you have to use sony ericson mobiles, like T220

 

gaspode42

Member

• Sep 7, 2009

• #5

Hi

You can use any PIC with a UART (RS232), you would need to check the signal levels of your target device as you may require a MAX232 as well. This will give you a configuration similar to a PC with external modem. AT commands are then written to the UART and processed by the module. Have you decided what module you are using as you may/will need additional I/O lines for module control.

 

F

fubuaks

New Member

• Sep 7, 2009

• #6

thnx.....
I have some knowledge of 89s52....can i use that or ny AVR...?
I've not decided on the gsm module.....can u tell me on wat lines shud i search for the module...???

 

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patidar_sachin

New Member

• Jan 31, 2012

• #7

gsm modem interfacing with 8051

hi anyone send me the embedded c code for sending sms from 8051 board to other mobile by gsm modem