Example8_LocalPressure.ino

/*
 Adjust the local Reference Pressure
 Nathan Seidle @ SparkFun Electronics
 March 23, 2018

 Feel like supporting our work? Buy a board from SparkFun!
 https://www.sparkfun.com/products/14348 - Qwiic Combo Board
 https://www.sparkfun.com/products/13676 - BME280 Breakout Board

 'Sea level' pressure changes with high and low pressure weather movement. 
 This sketch demonstrates how to change sea level 101325Pa to a different value.
 See Issue 1: https://github.com/sparkfun/SparkFun_BME280_Arduino_Library/issues/1

 Google 'sea level pressure map' for more information:
 http://weather.unisys.com/surface/sfc_con.php?image=pr&inv=0&t=cur
 https://www.atmos.illinois.edu/weather/tree/viewer.pl?launch/sfcslp

 29.92 inHg = 1.0 atm = 101325 Pa = 1013.25 mb
*/

#include<Wire.h>

#include"SparkFunBME280.h"
BME280 mySensor;

voidsetup()
{
 Serial.begin(115200);
 Serial.println("Example showing alternate I2C addresses");

 Wire.begin();
 Wire.setClock(400000); //Increase to fast I2C speed!

 mySensor.beginI2C();

 mySensor.setReferencePressure(101200); //Adjust the sea level pressure used for altitude calculations
}

voidloop()
{
 Serial.print("Humidity: ");
 Serial.print(mySensor.readFloatHumidity(), 0);

 Serial.print(" Pressure: ");
 Serial.print(mySensor.readFloatPressure(), 0);

 Serial.print(" Locally Adjusted Altitude: ");
//Serial.print(mySensor.readFloatAltitudeMeters(), 1);
 Serial.print(mySensor.readFloatAltitudeFeet(), 1);

 Serial.print(" Temp: ");
//Serial.print(mySensor.readTempC(), 2);
 Serial.print(mySensor.readTempF(), 2);

 Serial.println();

delay(50);
}