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DTMF decoding using GSM modem

Discussion in 'GSM' started by mervin, Jul 4, 2013.

  1. mervin

    mervin New Member

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    I am making a DTMF robot and i want to use gsm modem. While i searching on the internet i can find circuits only with mobile phone.
    Can i use sim300 module for it.
    anybody help me
  2. Binu

    Binu Administrator

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    You can connect the DTMF decoder to the audio output of sim300 module.

    Else you can use SIM900 module which have inbuilt dtmf decoding. so there is no need for any decoder IC.
    so try with sim900.

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