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July 1, 2008
about 5 years ago
This is all new to me, using GSM cell phone technology to directly control I/O at the ‘other end’, the receiving end.
In attempting to under stand a couple of the Sparkfun modules, I am not clear on what the originating call does after dialing and connecting to the module. I am thinking that the originating call phone
would have to have some sort of ‘app’ that sends out what ever is expected at the receiving end (?).
Or, is it just sending out keypad data which I would think would be DTMF tones at the receive end(?).
I notice that there are several GPIO pins on the GSM chip. So that means that the GSM must be
programmed on using the received communication in order to activate the desired GPIO(?).
This seems similar to using the Xbee modules.
A friend wants to use cell phone technology to connect to a remote cell phone and be able to
activate the outputs.
I am thinking that I would use these outputs as discreet (digital) inputs to a small PLC and then have
the PLC do the external control functions.
I can also use the Atmel AVR devices to configure and program the AVR board (Olimex) to control
the external I/O at the remote end.
Am I too far off base in using the GSM modules such as sold here at Sparkfun ?
GM862 Evaluation Board - RS232 , this is the product I was looking at.
Any suggestions/advice ?
Thanks in advance.
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