gsm device

riyunikenshee said:

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?

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