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Interfacing BS with a GSM modem — Parallax Forums

Interfacing BS with a GSM modem

asma.almaqdiasma.almaqdi Posts: 3
edited 2014-11-13 11:23 in General Discussion
I am using BS microcontroller from parallex. I want to send a SMS from the BS to a mobile phone. I could not find a GSM modem in the wireless components at your website. Can you tell me from where I can get a GSM modem that I can interface with BS. Or is there is another way to send a message to the mobile phone without using GSM modem?

Thanks.
Asma

Comments

  • Heater.Heater. Posts: 21,230
    edited 2014-11-12 23:12
    Sounds like you need one of these: https://www.sparkfun.com/products/9533 or these: https://www.adafruit.com/products/1946

    A quick google search might find you other similar options.
  • asma.almaqdiasma.almaqdi Posts: 3
    edited 2014-11-13 05:10
    Is it possible to interface BS2 with a GSM Modem with USB terminal. Can I use serial out and serial in commands with the USB GSM modem ?
  • Heater.Heater. Posts: 21,230
    edited 2014-11-13 05:17
    Those GSM modems I linked to use a serial connection from your microcontroller. So yes you will be using serial out and serial in commands.
  • asma.almaqdiasma.almaqdi Posts: 3
    edited 2014-11-13 05:52
    What a bout a modem with USB Terminal, can I interface it with BS2 ?
  • Heater.Heater. Posts: 21,230
    edited 2014-11-13 08:06
    Please show me an example of a modem with USB.
  • PublisonPublison Posts: 12,366
    edited 2014-11-13 09:58
    I guess there are USB GSM Modem devices.

    http://www.amazon.com/Generic-Wavecom-Q2303A-Interface-Commands/dp/B00BD0V57I


    Here is what you need to get the compatible signals to a Basic Stamp:

    https://www.youtube.com/watch?v=upDdAy8G0iI
  • PublisonPublison Posts: 12,366
    edited 2014-11-13 10:04
    Just remember, reliable communications are at 9600 baud with a BS2.
  • Heater.Heater. Posts: 21,230
    edited 2014-11-13 10:18
    Publison.

    That video shows how to connect a normal serial modem to a PC via a USB/Serial adapter. Nothing there about connecting a modem serial USB or otherwise to a microcontroller.

    All in a all for connecting to a BS forget about USB.
  • PublisonPublison Posts: 12,366
    edited 2014-11-13 10:59
    @Heater,

    Of course you are correct. Should have mentioned that.

    It was just to point out the fact that a USB to Serial adapter had to be in the mix.
  • Heater.Heater. Posts: 21,230
    edited 2014-11-13 11:23
    Ah yes, the puzzle is how to get serial out of the modem into USB and the the USB back to serial for the microcontoller without a honking great computer in the middle.

    Well, except that "honking great computer" could be a tiny and cheap ARM machine now a days. But then why use the BS ?

    Of course there are many 3G modems with USB slave interfaces available very cheaply. But they are not suitable for connecting to an MCU.
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