/* init and calibration */
void bmp085Init();

// do all measurements
// temperatur in centigrade
// pressure in Pascal
// return 0: ok
int bmp085Measure(float *temp, float *pres);

float bmp085PascalToMeter(long pressure,long seaLevel);

 
// returns altitude in m given pressure (in Pascal) at 0 m
float bmp085PressureToAltitude(long pressure, long seaLevel);