Charles,

If your interested I have working code that will give you a 100th of a percent in RH and a 100th of a percent in temperature for the full range of the sensor in Celsius, Fahrenheit and Kelvin. I also have code for checking the CRC thanks to Tom Estes. NavMicroSystems works fine but doesn't appear to handle negative temperatures though. If you're interested let me know and I'll post it when I get back to the office.