OneWire DS18B20 cable too long - how to extend range?

Hi.

I made temperatur monitoring system on Netduino plus 2 with DS18B20. In my installation I connect only one DS18B20 to one Digital I/O port. Some of my DS18B20 are on long cable - more than 100m. I cannot read them. On shorter cable (20-50m) everything works ok. Of course I use resistors but on cable longer than 100m it doesn't work. Does anyone know how to read DS18B20 on cables longer than 100m?

Try to use a smaller resistor value. I use 4K7 on short runs, 2K2 of medium  runs and 1K2 on long runs. I have never gotten it to work above 80M though.

It was the first thing I tried. I have 11 DS18B20 - 5 of them works on 2K2 and 1K2 - 6 doesn't work even on resistors smaller than 1K2 - that's why I'm asking about option to extend range. I heard something about DS2482 or DS2409 that it can extend range or changing time between byte read but I don't know how to use this