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I want to create a small bluetooth device, something that can be carried on a key chain, pendant that sort of thing, connect to a mobile device, and interface with an app that I will develop. The device will just have 2-3 buttons to send a signal to the app to execute a specific function, and MAYBE a speaker/mic like a hands free device.

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Specific design questions are preferred. – Leon Heller Feb 19 at 17:01
What is your question? – jippie Feb 19 at 21:02
Um, OK, so go ahead. Why are you telling us this? – Olin Lathrop Feb 20 at 14:57

closed as not a real question by Leon Heller, Dave Tweed, jippie, Nick Alexeev, Olin Lathrop Feb 20 at 14:55

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, see the FAQ.

1 Answer

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What you're looking for is Bluetooth Low Energy solution. The most common complete solutions out there are made by TI and Nordic:

TI CC2540

Nordic nRF8001

Take a look at their development kits.

Although BLE doesn't normally support microphone, it has been adapted to carry compressed voice, so you don't necessarily need classic Bluetooth. Classic Bluetooth is the normal bluetooth you think about for streaming music, but using it for carrying data with an iPhone requires an authentication chip from Apple. If you provide more specifics about your application. I would be able to point you more to what you need.

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