hi., iam building a computer interface gsm project, So once i send a msg from my gsm cellphone to my computer, my computer will send a signal to a relay to switch any of my inter face devices connected to it,. i need gsm schematic diagram to know how it works and how can interface that gsm device to my computer, do i need a gsm cellphone ? or just a external hardware that will recieve my gsm msg? thanks in advance... hope you can answer my problem?

 

I suggest you use a Nokia phone, they have a suitable interface you can connect to your computer - and there is already LOAD's of information and projects on the Internet about them!.

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