I have been trying to use pilot-link in pkgsrc for several days, but keep failing. 

`man uvisor` tells me that with /dev/ttyU1 pilot-link can be used, but /dev/ttyU1 appears only after pressing HotSync button and disappears in a few seconds.   It seems tlat pilot-link requires an always-existng port, in other words, a usual com port. 

When I grep sources of libraries of pilot-link, there are no word 'USB' then I doubt that no USB libraries is introduced into pkgsrc unlike linux. 

Could someone teach me how to use pilot-link with a visor's USB cradle?