BLE Relay System

RE: BLE Relay System

Hung Bui — Tue, 11 Apr 2017 09:28:22 GMT

I afraid you may need to read the Bluetooth core spec as the best source for BLE (check Vol3 Part H Core Spec v5.0). You can also have a look at this article here to have a quick overview of BLE security.

RE: BLE Relay System

hkartadi — Tue, 11 Apr 2017 01:51:16 GMT

Hi Hung Bui, thanks for the information. May I know which LTK key variable I would need to look for? and to which bond storage I need to store this new LTK value on new relay station?

RE: BLE Relay System

Hung Bui — Mon, 10 Apr 2017 11:20:07 GMT

Hi Handi,

Bluetooth Low Energy originally doesn't support what you described. The network topology of a BLE network is star only.

There is no mechanism to have a relay device and switch between relay device as in BLE.

However you can think of using MESH. We have open mesh and Bluetooth smart mesh which is coming.

Another option is to use the S132 v4 where we support up to 20 different connections at the same time. But be aware that when one device connect to 2 central at the same time, they are 2 different network here where each network is a star network with the central at the center. You then will need to do the forwarding on your own.

You can forward bond information, in this case the LTK. However, it's not something we have done before or have example to follow. You will have to make your own code to do that.