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Sending messages

  • AT interface

  • GSM modems support AT commands

    • AT+CMGS, AT+CMGW, etc…

  • Different devices and chipsets vary in supported features

  • Terminal needed, HyperTerminal, Minicom, PySerial

  • Can sometimes access GSM modem in phone

  • Either via serial cable or Bluetooth

  • Tends to be easier on feature phones

  • Modems vary in message support

    • GSM chip is at the heart of the modem.

    • GSM chip documentation requires NDAs

    • Treating chip as black box

RingZero

https://luis.ringzero.net

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