How to implement bluetooth open manually in iPhone?

It is my understanding that if you want to make bluetooth connections to custom devices, you have to join Apple's hardware developer program. I think that's not part of the normal developer API.

Game kit gives you the ability to make bluetooth connections to other iOS devices nearby, but it sounds like you want to connect to custom, non iOS devices.

 

That's true for standard Bluetooth devices.

However, you can talk to Bluetooth 4 Low Energy devices without needing to do that. If the device you're trying to talk to comes under that category, then look into the Core Bluetooth framework

 

I did not know that Apple had opened up the Bluetooth APIs for low energy devices to all developers. Thanks for correcting me.