Is it possible to run Zephyr BLE stack with the Bluenrg2+DTM fw? In general, is it possible to bypass the ACI commands and use standard HCI?

MMate.3 · ‎2022-01-18

Sebastien DENOUAL · ‎2022-01-18

Hi @MMate.3 ,

Yes, this is possible to bypass ST BLE stack and interface BlueNRG-2 at HCI level.

For this, you can build the DTM code example from BlueNRG-2 SDK with flag LL_ONLY enabled

This will allow to bypass the ST onboard BLE stack and being able to send HCI command from your host µC running zephyr.

FYI, about zephyr and BlueNRG network processor approach, a similar setup is already available with IDB05A1 shield : https://docs.zephyrproject.org/2.7.0/boards/shields/x_nucleo_idb05a1/doc/index.html

Note that this IDB05A1 expansion board is based on BlueNRG-MS network processor (not BlueNRG-2) . But overall behavior is fully similar (spi access, ...)

Hope it helps,

Sebastien.

Regards,

Sebastien