RE: BLE throughput differs between NCS v2.6.0 and v2.9.2.

chiba — Fri, 01 May 2026 00:39:12 GMT

Hi, thanks for your reply.
I’m attaching the prj.conf file.
Version 2.6.2 uses multi-image-build.
(Just to be safe, I’m also attaching the prj.conf from the sysbuild side.)
Neither the prj.conf for version 2.6.0 nor the one for version 2.9.2 specifies CONFIG_BT_CTLR_SDC_MAX_CONN_EVENT_LEN_DEFAULT.
I confirmed in autoconf.h that the default value is set to 7500.

- ncs v2.6.0
build\multiprotocol_rpmsg\zephyr\include\generated\autoconf.h(126): #define CONFIG_BT_CTLR_SDC_MAX_CONN_EVENT_LEN_DEFAULT 7500

- ncs v2.9.2
build\ipc_radio\zephyr\include\generated\zephyr\autoconf.h(138): #define CONFIG_BT_CTLR_SDC_MAX_CONN_EVENT_LEN_DEFAULT 7500devzone.nordicsemi.com/.../project_5F00_ncs260.zip devzone.nordicsemi.com/.../project_5F00_ncs292.zip

RE: BLE throughput differs between NCS v2.6.0 and v2.9.2.

Samruddhi Jadhav — Thu, 30 Apr 2026 13:20:41 GMT

Hi,

Yes, there are a few changes since sysbuild was introduced from 2.7.0. Please note that the configs of radio core are now in sysbuild\ipc_radio\prj.conf
Is it possible for you to share your sysbuild\ipc_radio\prj.conf file as well as the Kconfig.sysbuild file?

Best Regards,

Samruddhi