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Cell DTMF decoding and controlling built in software (mobile application) — Parallax Forums

Cell DTMF decoding and controlling built in software (mobile application)

ahmedfattahmedfatt Posts: 8
edited 2012-03-23 07:18 in General Discussion
Does anyone have ideas to get or make a cell/mobile phone application which can detect (decode) received DTMF during call and converts it to commands to one of that cell/mobile O/P terminals like serial port in Nokia S60?

simply to do the following:

sending DTMF (1st cell bottoms)
active call
> receiving DTMF (2nd cell audio channel)
processing
> command signals (2nd cell O/P terminal)

no extra devices (except relays to control target device),
no expensive ICs, PICs or ugly boards,
utilizing the receiver processor itself,
just a cell/mobile software.

any body tried to do some thing like that, heared about it ?

Comments

  • PublisonPublison Posts: 12,366
    edited 2011-11-06 09:41
    ahmedfatt wrote: »

    no extra devices (except relays to control target device),

    Sound suspicious, IED perhaps? More info needed.
  • ahmedfattahmedfatt Posts: 8
    edited 2011-11-07 01:16
    Publison wrote: »
    Sound suspicious, IED perhaps? More info needed.

    thanks for your cooperation,

    really very helpful cooperation, & positive replay.
    may be because of my name you made this great & amazing induction.
    appreciated.
  • ahmedfattahmedfatt Posts: 8
    edited 2011-11-07 01:42
    I found this,

    Phone Tone Decoder
    or
    http://www.sourcecodeonline.com/details/phone_tone_decoder.html
  • prof_brainoprof_braino Posts: 4,313
    edited 2011-11-07 06:12
    Yes, I have tried something like this, and yes I have heard about it. Do you have any specific question to ask?
    ahmedfatt wrote: »
    really very helpful cooperation, & positive replay. may be because of my name you made this great & amazing induction.

    You are the party asking for information. If you want help, you have to supply enough information so someone can make an answer
    If you display poor attitude, you will get less response than if you simply carry on the conversation.
  • Mike GreenMike Green Posts: 23,101
    edited 2011-11-07 08:27
    Remember that this is a Parallax support forum, for discussing things related mostly to products made and/or sold by Parallax. What you are asking about (from the limited description you've provided) is something that's very dependent on the specifics of the particular device you want to use and the phone's O/S, neither of which we can help you with. There have been discussions here on tone decoding algorithms and on decoding DTMF using a Propeller and on using an external DTMF decoder (the CM8880), usually with a conventional telephone or audio radio. As prof_braino suggested, if you have specific questions about the theory or about its implementation using a Propeller, do ask.
  • ahmedfattahmedfatt Posts: 8
    edited 2011-11-07 08:34
    prof_braino wrote: »
    Yes, I have tried something like this, and yes I have heard about it. Do you have any specific question to ask?

    OK,
    the first introduction, when you look at the OTS cell phones now you will find that there are many phones are going to be wast according to the very rapid IT development & huge increase in phones capabilities & features, accordingly I'm thinking of many projects that utilizing these old phones & in the same time making money!!!,

    In the developing countries like our countries people mainly can not pay for needed technology & automation solutions, here you may wonder if you found person is controlling his AC out side his home or buy software for his cell phone, & that is is the second introduction.

    the question is how to make money from technology in this not promising environment, & to make some thing dose not require a huge investment or capital, like many of smart Chinese products & solutions.

    after brainstorming & some research's about control using DTMF circuits, I have found that there are some ideas which deserve to think about;

    1) Low price DTMF teleswitch for home devices, its selling component is simple old cell phone software & 220v relay circuit.
    2) Low price IVR system for your work office, its selling component is simple old cell phone software.

    in the previous ideas the user utilizing his old cell phone of the 2nd or 3rd generation to get the same benefit of complected expensive control systems like in the first idea market alternatives (telecontrolled AC's), & to get the same benefit of expensive services of communication companies (voice mail service or IVR custom solutions).

    Now,
    the concept of the previous projects almost finished, & the definition phase requires the following questions to be answered;

    1) There are many methods to develop cell phone software using open source free licensed programs, but I'm not sure about decoding the active call wav audio, in other words; is there an API to bring wav data to be decoded by Goertzel algorithm?.
    Hint: I'm not specialist programmer but I can observe that there are many cell phone application which are dealing with the active call wav channel (call recoding applications).

    2) Is there any API to send signals to cell phone terminals like cell serial port (USB)?
    Hint: There are many API's to control cell phone built in devices like Bluetooth, Infrared, & camera but also, I'm not sure about USB.

    Sure, any replay will be highly appreciated.

    prof_braino wrote: »
    You are the party asking for information. If you want help, you have to supply enough information so someone can make an answer
    If you display poor attitude, you will get less response than if you simply carry on the conversation.

    I can understand this, but you can tell that to anyone without talking about Improvised Explosive Device (IED) !!!,
    its not easy talk matter.
    & thank you.
  • ahmedfattahmedfatt Posts: 8
    edited 2011-11-07 09:10
    Mike Green wrote: »
    Remember that this is a Parallax support forum, for discussing things related mostly to products made and/or sold by Parallax. What you are asking about (from the limited description you've provided) is something that's very dependent on the specifics of the particular device you want to use and the phone's O/S, neither of which we can help you with. There have been discussions here on tone decoding algorithms and on decoding DTMF using a Propeller and on using an external DTMF decoder (the CM8880), usually with a conventional telephone or audio radio. As prof_braino suggested, if you have specific questions about the theory or about its implementation using a Propeller, do ask.

    I came here because if there is no way to develop such software for low price & effective teleswitching & control solutions, may I find the hardware alternative from you products,
    I think there is no problem in asking BMW sellers about Mercedes-Benz prices to compare & take decisions, even if they don't sell such cars!.
    kindly please read my previous post.

    thank you.
  • Mike GreenMike Green Posts: 23,101
    edited 2011-11-07 09:12
    We can't help you with these last questions. As I said before, they're specific to the phone hardware and the operating system and none of that has anything to do with Parallax or its products. You'll have to look at websites like symbian.org and the documentation for the Symbian O/S.

    Search the forums here for subjects like DTMF. You'll find a variety of threads on external decoders like the CM8880 and on using the Propeller for decoding DTMF using the Goertzel algorithm.

    "BMW sellers about Mercedes-Benz" ... these forums work best for specific questions and the more information you can supply initially, the better the answer you will get. For complex questions such as yours, we can only point you at what information we have which is specific to Parallax products, but often useful in general.

    Regarding what you want ... I'm sure it's possible to develop software that will run on a Symbian smartphone and decode DTMF signals, but we simply do not have the detailed information necessary on the internals of the Symbian O/S and the phone hardware nor the familiarity with this information to help you. If you decide that you want to use an ordinary cell phone with external DTMF decoding hardware, the links we've already provided can get you started.
  • FadlAzharFadlAzhar Posts: 1
    edited 2012-03-23 07:18
    Hi,


    I found a website that offers source samples I used to my project. Check it for help... It is for Ozeki VoIP SIP SDK and helps how to create DTMF IVR sample. This SDK also works with Asterisk and other PBXs. I can recommend it:
    http://www.voip-sip-sdk.com/p_117-c-sharp-dtmf-ivr-implementation-voip.html


    BR
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