Alternate of GSM modem
i m working on a project in which i m taking input from a sensor to the uc 89c51 using external interupt ! on interput generation i wanted to send a sms using the gsm modem but the constraint is tht i m not aware of using GSM modem plus its expensive, can i use a simens mobile instead of it ? if yes then how ? i guess some At command works wid it i really dunt know how to use this command neither know how it woks :\
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