Android BLE peripheral with pin pairing

Question

I am developing an Android app which behaves as Bluetooth peripheral role with a service.

When I start advertising, other Android devices searching for devices offering this service, can see my device (and can pair to it without pin) - ok.

But how to enable PIN pairing?

Answer 1

You can force the device has to be paired, when using specific characteristics by protecting them with PERMISSION_READ_ENCRYPTED_MITM or PERMISSION_WRITE_ENCRYPTED_MITM.

The client/central side can force pairing by calling BluetoothDevice.creteBond().

The pairing method itself is determinated by the bluetooth protocol (see this thread)