Is there a way to distinguish between different components ?
 

Is there a way to distinguish by the MAC address or by any other parameter between Bluetooth wireless car kits and Bluetooth hands-free (headphone) kits?

I mean, when establishing a connection between the wireless care kits to my cell phone and when establishing a connection between the hands-free (headphone) kits to my cell phone.

I'm asking this question from an application point of view, if to be more specific, is there any flag or so in the protocol header that by following that flag I will be able to know which component is currently connected.

Or even different frequencies….

Kind regards…

Every device has (or at least should) have different MAC address like Ethernet cards. Apart from this each pair of devices use encryption key that was established during pairing. From API point of view each device has it's own number assigned in the interface (specific implementation depends on OS and specific stack).
So there is no problem with selecting exactly this device, you really want. Details depend on platform, BT stack and kind of device you want to use.

Its part of the bluetooth protocol defining the device class and profile, available in the discovery process. Nothing to do with mac address, frequency etc which are at a completely different layer. What you may be talking about is the difference between a Headset profile and a Hands-free profile.
Have a look here: http://doc.trolltech.com/qtopia4.2/qbluetooth.html and this tool is also quite useful: http://bluetooth-pentest.narod.ru/so...generator.html