BLE Pairing between ESP32 and iPhone

[Kenya Suzuki]

Hi,

I want to implement BLE pairing between ESP32 and iPhone(ios11).

The ideal behavior is that once one iPhone connected to ESP32,
any other central devices can't scan the ESP32 until the pairing is broken.
And also, bonded iPhone will automatically connect to ESP32 after that.

How can I implement that?
Some sample code would be helpful for me.

Regards,