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> On Apr 22, 2011, at 7:51 PM, William Chops Westfield wrote:
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>> I want to build a small device that can send a wireless signal to a =20
>> Bluetooth cell phone. I can use a Bluetooth module to generate =20
>> Bluetooth signal, which the cell phone can definitely receive. But =20
>> it will be costly and the module will consume too much power, is =20
>> there any way I can create some simple and low power rf signal and =20
>> the cell phone can detect?
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> I've been thinking that a low-cost bluetooth headset might be an =20
> interesting solution for this sort of problem.   Depending on what you =20
> want to do, you could use DTMF or modem tones over the audio channel, =20
> or you might be able to get by with just the assorted buttons on the =20
> headset; it depends on what sort of APIs to BT are on the device =20
> you're trying to communicate with.
> (hmm.  does anyone know of BT host-side software that can decode modem =20
> tones from a BT audio connection and provide the data in a more =20
> program-friendly manner?  DTMF, KCS, Bell 103, whatever?)
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> There are loads of BT headsets well under $10...
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> BillW

What a great idea !  I will check with my Linux friends to see what it take=
s to=20
#1 capture audio, convert the DTMF and produce digital data. =20
#2 convert digital data to DTMF, ship it as bluetooth audio.
99gus   gusNWdenver
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