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Interfacing microcontroller and gsm modem

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fubuaks

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

fubuaks

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

gaspode42

Member
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.
 

fubuaks

New Member
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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