nRF51 Sniffer LTK support

[Eugene]

As far as i understood it supports 4.2 BLE because using it i'm able to see packets between nRF52 central and peripheral boards (HRM example). Is it so?

[Hung Bui]

Hi Eugene,

Please clarify your question. What do you mean by "supports 4.2"? Bluetooth 4.2 is backward compatible with 4.1 and 4.0.

[Eugene]

I can see packets between 2 boards with nRF52 (S132) - Central HRM and Peripheral HRM. As far as i understand they have encrypted dialog (so they share the same LTK which presences only in 4.2 BLE). So how i'm able to see these packages with nRF51 Sniffer?

[Hung Bui]

No, The Legacy BLE pairing (LTK you mentioned) is available from Bluetooth 4.0.

The new encryption/pairing model is the LE Secure connection. But we haven't supported it yet on the nRF52 or nRF51 stack.