Fastest most reliable way to transfer data between two nrf5 units

[MikeLemon]

Hello, 

So I'm loooking for a way to transfer relatively small quantity of data live as reliable as possible and as quick as possible between two nrf5 units and then between a smartphone and a one of the units.

Now for what I understand you need to configure one unit as central and one as perepheral. Is that the right way?

Anything else I need to know it terms of configuring each device?

Thanks for helping!

[Kenneth]

Hi,

It is difficult to give a short answer, but yes, you are thinking correct.

For two units to communicate, one will need to be in peripheral mode and the other in the central role. Our BLE softdevice stack can handle both roles, and multiple connection at the same time. So yes, you may for instance have one unit as a peripheral role, and one unit as a central role and peripheral role, and finally the mobile phone as a central role.

The closest example that resemble this I think will be the relay example:
http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/ble_sdk_app_rscs_relay.html?cp=4_0_0_4_1_1_2 
\nRF5_SDK_15.0.0_a53641a\examples\ble_central_and_peripheral\experimental\ble_app_hrs_rscs_relay

Best regards,
Kenneth