Can ble_app_multilink_central example connect to more than 8 peripheral devices?

[Glenyz]

Hi,

I trying to adapt the ble_app_multilink_central example to allow more than 8 peripheral connections to the central device. However, when I change NRF_SDH_BLE_TOTAL_LINK_COUNT in sdk_config.h to be any value greater than 8 the LED on my board does not light up. I am using a nrf52840DK and plan to flash it onto custom boards with the same chip. 

(this part in the config file)

// <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 8
#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 8
#endif

Does anyone know how I can enable the program to allow more than 8 connections?

Thanks.

[Simonr]

Indeed, you will need to adjust the RAM and Flash memory here to fit your needs. Please follow the adjustment of RAM/Flash memory guide here to do so. 20 total devices should be possible, but that is the absolute maximum you can use with the nRF5 SDK and SoftDevice. For more than that you need to move to the nRF Connect SDK.

Best regards,

Simon