which app should I use when I want to do LL BQB test with harmony on nRF52840?

[wanggang1]

which app should I use when I want to do LL BQB test with harmony on nRF52840?

it can not connected with harmony when I use DTM project. It seems the interface of  nRF52840 is a  2-wire uart.

But harmony send HCI command through uart with H4 type.  

[run_ar]

Hi,

The LL of our SD is not available at a customer level for testing. If you are using our Softdevice you need to reference our qualified design for the nRF52840 and S140 combination.

For RF-PHY testing we support the 2-wire uart interface as described in the bluetooth core specification.