ble directed connection

[Mohamed O.Abouzeid]

hi everybody,

I'm working in a project, I need to establish a connection between a beacon & the mobile phone, I want to prevent any other masters of connection to my beacon, I used directed advertisment & it works proper, unfortatunely tha the mobile when the bluetooth is turned off, I couldn't connect to the beacon again, what is the solution? ?

Note that I wouldn't be able to use pairing with passkey due to some confidentional specification what will I do to solve this problem? ?

[FormerMember]

When using directed advertising, the advertising packet includes the address of the only initiator that can connect to the advertiser. (Bluetooth Core Specification v.4.2, Vol. 6, Part B, chapter 4.4.2.4)

Which mobile of do you use? An iPhone? If you are using an iPhone, directed advertising will not work because it changes address every 15 minute. Instead, you should use a whitelist containing the acceptable devices. The nRF51/52 can then recognize the iPhone based on its IRK.

Security issue when only using directed advertising: If another device change its address to the initiator address in the advertising packet, that device will be able to connect to the advertising device as well. Using a whitelist in addition to the directed advertising will solve that problem.

[Mohamed O.Abouzeid]

thank you for your help, would you tell if ble_advertising.c will help to use the whitelisting or not, I don't want to use the device manager to handle the coonection events because of FOTA won't work in that case ;)

[FormerMember]

Yes, it can be useful to use ble_advertising.c. This tutorial shows how to add a whitelist when advertising. I would also recommend you to take a look at the documentation for the the advertising module, it can be found here.

Note that if you use the advertising module to switch between advertising with and without whitelist, the correct flags will not be set when leaving advertising with whitelist. The fix can be found in this post.

[Mohamed O.Abouzeid]

I need to use whitelisting without using the bonding/pairing which is handled by the device manager, I need to be able to use FOTA & let device manager handles FOTA only would it help kristin ?? , thank you for your great help, I'll try & hope it help isA.

[FormerMember]

Okay, I see. The tutorial I linked to shows how to add devices to the whitelist without any interaction with the device manager.

[Mohamed O.Abouzeid]

Will whatnare kind of addresses that whitelist use to store??? I mean does it deal with the static address of the mobile or the random one?? Agian I don't need to use bonding pairing as I need to do fota soomthly ???