For classic bluetooth usage,
you need to check out bluetooth over MFi on iOS.
The current board you have is not able to communicate with iOS.
- you need a CP chip for MFi
- only iAP profile is available for data communication
- External Accessory framework is the framework your are looking for
- no user control for bluetooth connection, only notifications when it’s connected/disconnected
It’s better to get the MFi BC127 EVB from MFi vendor to try. and you will need MFi license to buy one.
Best,
Brett