How does my central device(phone) talk to 2 peripherals?

RE: How does my central device(phone) talk to 2 peripherals?

Sigurd — Tue, 13 Aug 2019 14:20:11 GMT

[quote userid="18054" url="~/f/nordic-q-a/50763/how-does-my-central-device-phone-talk-to-2-peripherals/203669"]experimental dual role example and integrate the UART over BLE into this??[/quote]

I don't know the example you are referring to here. I would have started with ble_app_uart, added the relevant parts from ble_app_uart_c, and maybe used ble_app_hrs_rscs_relay as reference. However, this example here on github might implement what you are looking for: ble_app_lbs_nus_its_multi-role

[quote userid="18054" url="~/f/nordic-q-a/50763/how-does-my-central-device-phone-talk-to-2-peripherals/203669"]Also what about the S130 softdevice for nRF52810?? I think that only covers peripheral and no central?[/quote]

SoftDevice S130 is for nRF51-series. For nRF52810 you would normally use S112 Softdevice(peripheral only), it's possible to use S132 v5.1.0 on nRF52810, but nRF52810 has limited flash and ram, so running a multi-role application on nRF52810 would not be advisable, I think you would run out of available RAM. So, I definitely recommend to use the nRF52832 instead.

RE: How does my central device(phone) talk to 2 peripherals?

Craig — Mon, 12 Aug 2019 16:33:30 GMT

OK thats great....so how can I easily use that? I am assuming you mean the experimental dual role example and integrate the UART over BLE into this?? Also what about the S130 softdevice for nRF52810?? I think that only covers peripheral and no central?

RE: How does my central device(phone) talk to 2 peripherals?

Sigurd — Mon, 12 Aug 2019 06:29:15 GMT

[quote userid="18054" url="~/f/nordic-q-a/50763/how-does-my-central-device-phone-talk-to-2-peripherals/203410"] but can it be a central without breaking the peripheral connection to the phone?[/quote]

Yes, it can. In fact, the nRF52832 with S132 supports in total 20 concurrent links with freely selectable role (Central/Peripheral). That means that you can have e.g 10 Central and 10 Peripheral links at the same time.

RE: How does my central device(phone) talk to 2 peripherals?

Craig — Fri, 09 Aug 2019 21:38:27 GMT

Does this allow for the master and slave in the middle to be simultaneous without breaking the connection to the phone?

RE: How does my central device(phone) talk to 2 peripherals?

Craig — Fri, 09 Aug 2019 21:37:38 GMT

Hi,

That is great info......Yes that is mostly the case I just simply want the nrf52832 in the middle to be the peripheral but can it be a central without breaking the peripheral connection to the phone? That is the ideal case.....

RE: How does my central device(phone) talk to 2 peripherals?

Sigurd — Thu, 08 Aug 2019 11:15:21 GMT

Hi,

Is this the network topology you are after ?

If yes, then this is fully possible to implement. If the second peripheral need to send data to the phone, the first peripheral can act as a relay node (acting both as a central and peripheral device). Take a look at this example. You might also find this example useful.

Also, take a look at this youtube video for a demonstration of the nRF52 multilink capabilities.