Avoid connection of nearby devices with same firmware with each other (NRF52833).

RE: Avoid connection of nearby devices with same firmware with each other (NRF52833).

Jared — Thu, 30 Jun 2022 13:31:33 GMT

You need to adjust the memory settings when increasing the link count. The log output from nrf_sdh_ble_enable() should tell you exactly what you should adjust it too. See this blog post.

regards

Jarred

RE: Avoid connection of nearby devices with same firmware with each other (NRF52833).

sne_333 — Thu, 30 Jun 2022 04:53:59 GMT

Hi Jared,

I added the above configuration but the code is getting error message. It is showing error message at the following lines:

err_code = nrf_sdh_ble_enable(&ram_start);
APP_ERROR_CHECK(err_code);

how to solve this?

Thanks & Regards,

Snehal

RE: Avoid connection of nearby devices with same firmware with each other (NRF52833).

Jared — Tue, 28 Jun 2022 13:42:18 GMT

Hi,

[quote user="snehal_2789"] How can we connect multiple phone to one peripheral device? What changes are needed to be done?[/quote]

See the multi-peripheral example in the SDK. The most essential thing is that you adjust these configs in the sdk_config.h file:

// <o> NRF_SDH_BLE_PERIPHERAL_LINK_COUNT - Maximum number of peripheral links. 
#ifndef NRF_SDH_BLE_PERIPHERAL_LINK_COUNT
#define NRF_SDH_BLE_PERIPHERAL_LINK_COUNT 4
#endif

// <o> NRF_SDH_BLE_CENTRAL_LINK_COUNT - Maximum number of central links. 
#ifndef NRF_SDH_BLE_CENTRAL_LINK_COUNT
#define NRF_SDH_BLE_CENTRAL_LINK_COUNT 0
#endif

// <o> NRF_SDH_BLE_TOTAL_LINK_COUNT - Total link count. 
// <i> Maximum number of total concurrent connections using the default configuration.

#ifndef NRF_SDH_BLE_TOTAL_LINK_COUNT
#define NRF_SDH_BLE_TOTAL_LINK_COUNT 4
#endif

NRF_SDH_BLE_TOTAL_LINK_COUNT = NRF_SDH_BLE_PERIPHERAL_LINK_COUNT + NRF_SDH_BLE_CENTRAL_LINK_COUNT

Also there is many threads on this topic in this forum, so I would suggest that you read through a couple of them.

regards

Jared

RE: Avoid connection of nearby devices with same firmware with each other (NRF52833).

sne_333 — Tue, 28 Jun 2022 13:14:16 GMT

Hi Jared,

Thanks for your reply. I actually was testing wrong. The other central device was getting connected and not the 2 peripheral devices were connected to each other. In my current firmware I am able to connect only one mobile to my device. How can we connect multiple phone to one peripheral device? What changes are needed to be done?

Thanks & Regards,

Snehal.

RE: Avoid connection of nearby devices with same firmware with each other (NRF52833).

Jared — Wed, 22 Jun 2022 13:31:48 GMT

Hi there,

My understanding is that the device is only advertising, not scanning? So are they connecting to each other if both are acting as a GAP peripheral? Are you sure that it's the two nRF52833 that is connected? Could there be some other nearby advice which has already paired with the nRF52833?

regards

Jared