Master emulator pairing, passkey and bonding issue

[Ben]

Hi  Sir/ Miss:

I use master emulator to develop software testing device that dll version is 2.1.13.14.

It's developed on using C#.

And, I use nrf51 dongle (PCA10031) to develop software.

I have two questions about pairing, entering passkey and bonding with peripheral device.

Q1.

When I connect that device don't require to enter passkey, I can get the data on device information service and battery service.

But, I can't get any data on requiring passkey device. The API display " ATT error insufficient authentication " message.

I check the master emulator document of pairing, passkey and bonding in security sections.

It has some topic about these sections.

I can't find how to enter passkey and send to device?

It only mentions that "public int Passkey { set;}". That, I can set value for passkey.

But, I don't understand how to send it to device? Is there having API function for user in MasterEmulator.dll?

Or, should I use "SendData" function to send passkey?

Q2.

I don't understand the SOP of pairing, passkey and bonding.

In my current thoughts, the SOP might be connect -> pairing (STK) -> send passkey -> bonding (LTK).

If it's wrong, please correct me.

Thank you.

[Ben]

I've set iocapability to keyboardonly or keyboarddisplay.

When I want to get DIS, it still displays ATT error insufficient authentication.

I think it should be got event to notify me to enter passkey.

May I ask whether is it having this event?

Thank you.

[Jørgen Holmefjord]

Some more details and clarifications from the developers:

It is always the Central that has to initiate pairing, i.e, call Bond() in master emulator. The Central can either initiate pairing on own initiative, or wait for Peripheral to send a Security Request. Either way Bond() must be called. SecurityParameters that is sent in SequrityRequestEvent is information about the Peripheral's parameters. The Central's parameters must be set in the Bond()-call. If no parameters are set in then Bond()-call, default SecurityParameters will be used.