For the Hobby Boards Solar/Humidity/Temperature sensors check the diagram at:
http://www.hobby-boards.com/catalog/links/hts3-r1/Humidity-Temp-Solar%20v3.2%20Schematic.pdf

There are two 1-Wire devices on the board and they have different addresses:
– the DS18S20 – 1-Wire Parasite-Power Digital Thermometer
– the DS2438 Smart Battery Monitor

The DS18S20 is the thermometer and therefore you should read the temperature at this device that typically has an address that starts with 10 (mine is 10.07303C020800). Do NOT read the temperature at the other address.

The DS2438 reads the Humidity on the VAD side and the Sunlight on the VSENS side. This device typically has an address that starts with 26 (mine is  26.47AD21010000).

In owfs just go at the address that start with 10 and read the temperature, then go at the address that starts with 26 and read the Humidity at “Humidity” and the sunlight at “vis”.
See:
http://owfs.org/index.php?page=ds2438

Vis is a real value (the voltage accross R2 – my sensor right now is reading 0.00170870) so typically you should multiply it by something like 10,000 before showing it. Then note the reading when you have full sun and adjust the multiplication factor so that the result is 100 % sunlight.