Oops, no wonder Im getting noting...
Now that I read the value, i get 17 from 16:17
Will look into reading the whole thing.
With that library, I connected it all up to I2c and the XCLR pin to 19 (on mega) as specified on the cpp file, and get this:
Temp nan Pressure inf Altitude: Meters = 6146817, Feet = 20166726 smoothed = 20166726, deviation = 5083363
30154
Temp nan Pressure inf Altitude: Meters = 6146817, Feet = 20166726 smoothed = 20166726, deviation = 5083363
30154
and the values were not changing so I am now looking for documentation on this library. If the library is reading calibration data from the EEPROM, then it may be reading from the wrong address. Datasheets I have seen say that it is manufacturer programmed, so even with identical parts, the data is likely stored in different places on the EEPROM.