mtf01 lidar setup

mtf01 with usb adapter won’t connect to microassistant

Have you tried using Ardupilot’s Serial Passthrough method?

It works for me, Arducopter 4.6.3 + serial passthrough + MicoAir MTF-01 + MicoAssistant_v0.9.15.exe

I am using inav.

Then you are on the wrong forum