creating a gadget to call your cell phone

lobo

Does anybody have a schematic or webpage where i can build an electronic device that once my laser alarm system is triggered it will call my house phone or cell phone?

please help?

Thak you·for yas help!

Whelzorn

This could be done by sending DTMF signals from your microcontroller through your house phone line. But you need an existing phone line to make it work...

Mike Green

Here's an interesting module: xecom.com/datasheets/XE0068DT.pdf. This can be used to place a call using touchtone tones, like to a cell phone. You could also use prerecorded messages from an MP3 player (like the Vinculum VMusic2) or a voice recorder like those (QV606) from Quadravox www.tetraphon.com/QVFrames.htm. The DAA also has a touchtone receiver so you could use the cell phone's keypad to signal to the microcontroller.

Bruce Bates

Folks -

Don't take the hard or expensive route to solving this simple problem!

Grab an old Hayes compatible modem, set up a serial link from it to any PBASIC Stamp and "ATDT ..." to your heart's content. You can call anywhere in the world like that, without having to worry about DTMF timing, whether or not your DAA is FCC Approved, or any of that other nonsense.

If you don't happen to have one I suspect for $10.00 or less you can pick one up from the Salvation Army, or anywhere else like that.

Regards,

Bruce Bates

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LoopyByteloose

Bruce is right. There are a lot of things that can be easily done with an old modem. Ironically many of us have thrown them away, but they are an ideal interface for a BasicStamp to telephone and the better ones can dial a phone number for you, then send data. I have one, but I really wish I had two of them. Still, one can send a fax from a file.

If you just want the dialer feature, the BasicStamp can dial a telephone number and provide an audio Beep code that lets you know the condition.

The real question is how does the cell phone route the modem data into a useful form? You usually need a pair of modems - one at each end.

If you want a real SMS message to be sent to your inbox, you might consider other alternatives. Yahoo provides SMS service to cell phones.

So if your PC can forward a message to Yahoo via the internet, you can get it on your cell phone. In such a case, you might use a PINK to forward the data to your PC first. But I fear that you might get unwanted delays.

www.sxlist.com has all the assembly code and circuitry examples to program an SX28 to work as a dialer and even as a modem.· It is really up to you about how much you want to DIY and how much you want to learn about the principles involved.

Still the chip mentioned above is nice because you don't have to add a 600 ohm transformer and ring detection to the circuit.

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"Everything in the world is purchased by labour; and our passions are the only causes of labor." -- David·Hume (1711-76)········

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Post Edited (Kramer) : 10/3/2007 10:00:51 AM GMT

stephenwagner

Try this.

http://forums.parallax.com/showthread.php?p=661006

SJW

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lobo

great info guys keep it coming! thanks