Sending and Recieving multiple SMS
C#
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Hello dear friends. Thanks to Ranjan.D article about How To Send and Receive SMS using GSM Modem[^] I could modify his program and adapt it to my small application which needed to send a command line from a pc via sms to a digital device and this device will returns a value which is received in the PC and stored in a database. The question is, how could I do to send this command via SMS to multiple devices and get all the answers you need in one pc. I read something about "SMS Gateway" but the truth is that I'm not excited about the idea of having to make a payment for this service in addition to what I already paid to the telephone operator for the chip's and sending messages. Whould you give some ideas????