Both the Softdevice (nRF5SDK) and the Softdevice Controller(nRF Connect SDK) are both delivered as binaries. However, the Zephyr BLE controller is public open-source.
Both the Softdevice (nRF5SDK) and the Softdevice Controller(nRF Connect SDK) are both delivered as binaries. However, the Zephyr BLE controller is public open-source.