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add another function, which will return seaLevelPressure for a given height #3

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merged 2 commits into from
Feb 27, 2014
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add another function, which will return seaLevelPressure for a given height #3

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2f67335
Update Adafruit_BMP085_U.h
kunosee Feb 26, 2014
8192b69
Update Adafruit_BMP085_U.cpp
kunosee Feb 26, 2014
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16 changes: 16 additions & 0 deletions Adafruit_BMP085_U.cpp
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Expand Up @@ -364,6 +364,22 @@ float Adafruit_BMP085_Unified::pressureToAltitude(float seaLevel, float atmosphe
* (temp + 273.15F)) / 0.0065F;
}

float Adafruit_BMP085_Unified::seaLevelForAltitude(float altitude, float atmospheric, float temp)
{
/* Hyposometric formula: */
/* */
/* P0=((((h*0.0065)/(temp + 273.15F))+1)^(^/0.190223F))*P */
/* */
/* where: h = height (in meters) */
/* P0 = sea-level pressure (in hPa) */
/* P = atmospheric pressure (in hPa) */
/* T = temperature (in �C) */

return (float)pow((((altitude*0.0065)/(temp + 273.15F))+1), (1.0/0.190223F))*atmospheric;
}



/**************************************************************************/
/*!
@brief Provides the sensor_t data for this sensor
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1 change: 1 addition & 0 deletions Adafruit_BMP085_U.h
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Expand Up @@ -99,6 +99,7 @@ class Adafruit_BMP085_Unified : public Adafruit_Sensor
void getTemperature(float *temp);
void getPressure(float *pressure);
float pressureToAltitude(float seaLevel, float atmospheric, float temp);
float seaLevelForAltitude(float altitude, float atmospheric, float temp);
void getEvent(sensors_event_t*);
void getSensor(sensor_t*);

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