The unified sensor library is for slightly more advanced users - it provides a more 'unified' structure for all sensors that Adafruit sells. It mimics the Android sensor platform, and is good for people who are comfortable with data structures.
Download Adafruit_BMP183_Unified library
To begin reading sensor data, you will need to download both the Adafruit BMP183 Unified library and the Adafruit Unified Sensor library from the Arduino library manager.
Open up the Arduino library manager:
Search for the Adafruit BMP183 Unified library and install it
Search for the Adafruit Sensor library and install it
We also have a great tutorial on Arduino library installation at:
http://learn.adafruit.com/adafruit-all-about-arduino-libraries-install-use
Load Demo
Open up File->Examples->Adafruit_BMP180_Unified->BMP183test and upload to your Arduino wired up to the sensor
Upload & open up the serial console at 9600 to see the data printed out
