nRF5340 NCS switch between DTM and normal BLE stack with the same firmware?

[denis]

We are using an nRF5340.  Looking at the nRF Connect SDK direct_test_mode sample, it appears that the network core is flashed with DTM only firmware.  In our application we want to be able to flash our device with once with our application firmware and then at run-time switch to DTM mode.  We will restart the firmware after switching to DTM mode and when the firmware starts up in DTM mode it will offer all the DTM functions.  Then we switch back to normal mode and restart and go back to using the normal BLE stack.

Is there a configuration of the ncs network firmware that supports this?  What would it take to make this work?

[Einar Thorsrud]

Hi,

The SoftDevice controller does not support DTM, so using that, you need to use separate binaries for DTM and when you use the Bluetooth stack. (The Zephyr controller on the other hand support DTM over HCI when built with CONFIG_BT_CTLR_DTM_HCI=y, but I would not recomend that you use the Zephyr controller in your end product).

[denis]

It would be great if this capability could be added to the nRF5340 BLE stack and available using Zephyr APIs.  It is pretty important for RF testing to go into production.