nRF52_SDK_14.0 can support BLE concurrent conntion up to 20 or not?

[jacky.li]

we validate the example /ble_centeral/ble_app_multilink_central with NRF_SDH_BLE_TOTAL_LINK_COUNT equals 8. Change the number from 8 up to 15, it still work.

but when the count is 20, there is compile error. then change app_util.h to let the compilation successful. After a successful compilation, download the code to flash and let it run. we found the client can connect to the central but data sending fails.

There is news that NRF52 SDK can support 20 connections, but why the default connection can only up to 15, and even we change app_util.h to make it run, there is some problem to send data.

Please help.

[endnode]

Hi Jacky, firstly number of concurrent connections is property of BLE stack so in your case Nordic Soft Device, not directly SDK. Secondly this is known bug/limitation of nRF5 SDK v14.x which have been or should be fixed in later releases. Read following thread.