Multi central connect to multi peripheral example

[Giang]

Hi all , I using module NRF52832 and SDKv14 . I have 2 board central and 2 board peripheral . I want to connect each board central to all board peripheral and connect each board peripheral to all board central . Pls give me advice . Thank very much .

[Jørgen Holmefjord]

Hi,

Please have a look at the Experimental: BLE Multiperipheral Application Example and the BLE Multi-link Example in the SDK.

[EDIT 16.10.2017]: Attached modified example from multi-link central example to support connection to multiperipheral example: main.c

Best regards,

Jørgen

[Giang]

Hi Jørgen , I can connect 1 peripheral to multi central and conect 1 central to multi peripheral .But I cant connect multi peripheral to multi central at the same time . I not sure it is posible . Can you give me advice ? Thank

[Jørgen Holmefjord]

What you are experiencing is most likely due to this note in the documentation of the ble_multiperipheral example:

Note that you can also use the BLE Multi-link Example as Central. However, the multi-link example accepts all peripheral connections, so the Peripheral will connect four times to the same Central. As a result, you will see four indications for each event.

You will have to modify the multi-link cental example to check if the address found in the advertising packet is the same as the one of an already connected device. I have attached a modified version of the multi-link central example from SDK 14 that should support connection to multiple examples running the multiperipheral example, in my above answer.

[Giang]

Thank Jørgen , It worked . If I want to send and receiver the string between peripherral board and central board ,I need to care about the function ? Thank !!!

[Jørgen Holmefjord]

If you want to sent strings, you can use the Nordic UART Service (NUS). We have examples for both Peripheral and Central, but these does not implement support for multilink. You will have to study the multi-link central and multiperipheral examples, and transfer the principles used to the NUS examples.