Peripheral, central and mobile device

[Javier]

Good morning.

I have two nrf-51 boards and a mobile device, the SDK that I´m using is the v.12.2.0. I need that the three devices are connected at the same time and its have to be able to send/receive bluetooth messages. For this case, I would program a nrf-51 as a peripheral (Peripheral Board) and the other nrf-51 as central (Central Board). The Peripheral Board has to be able to send/receive message from/to Central Board at the same with Central Board and the mobile device.

Squema

Peripheral Board    <---(bluetooth conection)--->    Central Board    <---(bluetooth conection)--->    Mobile device

I have read in some posts that with the example "ble_app_multilink_central" is posible to connect 7-8 peripheral to a central device, but is posible:

• Can the mobile device connect to the "Central Board"?
• Is the "Central Board" able to receive bluetooth messages from two diferent devices (peripheral and the mobile device) simultaneously?

All helps is wellcome, thank you.

[Martin Lesund]

Hello Javier,

• You can have the mobile device connect to the "central board" if it runs as both Central/Peripheral roles. Like these examples.
• Answer to your second question

[Javier]

Hi Martin, thank you for answer.

I was looking for posts with similar question and I found some interesting posts (post) where explain something similar. Reference your answer, in the first point, all ok, I understand it, but in the second point, he has 3 boards, A (Central) and B,C (peripheral), he has connected his boards this way: B <-> A <-> C and he needs that board B sends datas directly to the board C, for this, he disconnect B and connect it to C board.

In my case, I don´t need to disconnect the devices:

Peripheral board  <-> Central/pheriperal board  <-> Mobile devices

For my case, is posible that Central/Pheriperal board can manages all Bluetooth message from pheriperal and mobile devices without disconnect any boards?

Thank.

[Martin Lesund]

I would recommend you to look at this BLE relay example and you can use that as reference for your application.