How to allow Bonding when a button is pressed?

RE: How to allow Bonding when a button is pressed?

Petter Myhre — Wed, 28 Jan 2015 08:35:06 GMT

If you don't think the solution is handy I suggest you add a new question and explain what your requirements are. It is just one solution, and it was accepted. And, you don't need to hold the button. You can for example allow bonding for 30 seconds after a button press.

RE: How to allow Bonding when a button is pressed?

Marcel Mulder — Tue, 27 Jan 2015 08:00:23 GMT

The suggested solution it not very handy if I understand it correctly. You should press and hold the button and in the meantime setup the connection with your phone? Hmmmm, how can explain that to my customers...

RE: How to allow Bonding when a button is pressed?

Marcel Mulder — Tue, 27 Jan 2015 07:07:01 GMT

What I do (or actually did) is to advertise with whitelist filtering except when the button is pressed. Than I advertise to accept any connection for 30 seconds. After it is bonded it can connect using whitelist. The disadvantage is that you can have only 8 devices in the whitelist, so that's the limit. I am now changing to authentication on application level. For some reason the Bluetooth SIG never thought about our kind of user scenarios. But I think our scenario quite obvious.

RE: How to allow Bonding when a button is pressed?

nullpointer — Mon, 26 Jan 2015 17:43:39 GMT

Hi ccook, I have to do something very similar, for the time being I read only the theory and I haven't implemented yet, I think that is how it works: 2) The device will have 2 buttons (1 for bonding, 1 for delete all bondings)

The device normally adversite in WHITE_LIST_MODE (so, no one can bond it, because no one is in the list)
You push a button in the BLE device, and the device advertise in normal mode, so then you can bond your tablet, iphone, etc... for the future when the device advertise in WHITE_LIST_MODE
Pushing the second button DELETE_ALL_BONDINGS, will unbond all the devices previously bonded...

so, whenever you push Button1 in the BLE device you can add new phones, tablets, etc...

you can check this example ....\nrf51822\Board\nrf6310\s110\ble_app_proximity included in the SDK

RE: How to allow Bonding when a button is pressed?

c cook — Mon, 26 Jan 2015 16:05:21 GMT

Petter - I've looked at that - with my device I have only 1 button - when I set up my security parameters I have the following choices:

BLE_GAP_IO_CAPS_DISPLAY_ONLY // I don't have a display

BLE_GAP_IO_CAPS_DISPLAY_YESNO // I don't have a display - I have a "yes" button, but not a "no"

BLE_GAP_IO_CAPS_KEYBOARD_ONLY // I don't have Keyboard

BLE_GAP_IO_CAPS_NONE // "just works" but I want to require a button press

BLE_GAP_IO_CAPS_KEYBOARD_DISPLAY // I don't have a Keyboard, or a display

Which of these do I choose? I think the correct route is to set up static passkey, but I'm having problems figuring out how to make my device prevent bonding, until the button is pressed.

RE: How to allow Bonding when a button is pressed?

c cook — Mon, 26 Jan 2015 15:55:54 GMT

Nullpointer - My application involves controlling a device in the home. We want to allow multiple devices to be able to connect - for example Husband's phone, Wife's phone and maybe a tablet or two (I know only one device will be connected at a time). We want to prevent bonding, unless someone has physical access to the device (hence the button press). I'm still quite new to BLE, but my understanding is, once the white list is created, the device will only advertise for, and accept connections with centrals on the white list. How are new devices be added to the white list? In other words - I buy a new tablet, what's the process to get it added to the white list?

RE: How to allow Bonding when a button is pressed?

Petter Myhre — Mon, 26 Jan 2015 14:53:02 GMT

Here it is, but this is from the S110 SoftDevice documentation.

Please have a look at this example, it implements static passkey.

How to allow bonding when a button is pressed seemed to be answered here.

RE: How to allow Bonding when a button is pressed?

nullpointer — Sat, 24 Jan 2015 06:17:53 GMT

Check this:

devzone.nordicsemi.com/.../

Regards