Thanks,
that was it.
I seen that file in old Mervis, but thought that it is older version of Lib.UniPi,
but also was blind and don't see it in on download page.
Thank you very much, now it works.
Just for info.
For me it works with DS2413 (1wire dual channel switch), at least in output mode.
I used library for DS2408 (1W-8R) and only modified family number.
solid state relays are ideal for switching LED lights, see the datasheets below for more information. If you use adequate cooling for the load it will withstand for years. I would not much bother with the minimal load, but check the datasheet.