iphone bluetooth getting an event or data from a device

I'm new to bluetooth. Is there a way开发者_开发百科 through an API call or callback to get some event from a device that's connected via BT to the iphone? That is, without using the apple authentication chip?

A simple example would be an accessory that acts as a doorbell. My device would send "something" to the iphone to tell it someone pressed the doorbell button.

No - your accessory has to be MFi compliant