How to add software FEM support on NRF5340 (not MPSL)

[Richard Lin]

I want to add software FEM support on NRF5340 on my project which is not using MPSL or NRF21540. could you help on this?

[Kenneth]

Hi,

I am not aware of any way of doing this without MPSL. Can it be that the simply GPIO configuration will work for you? 
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrfxlib/mpsl/doc/fem.html

Then you can control two pins (LNA and PA) that will go high a configurable time before reception/transmission. This should hopefully work with most FEM out there.

Kenneth