bme680_altitude.c File Reference

Sensor driver for the Bosch BME680 air quality sensor. This library supports i2c and 4-wire SPI connections, reads temperature, pressure, relative humidity, and VOC levels, and provides limited support for adjusting the sensors settings. More...

#include "bme680.h"

Functions
float	bme680_altitude (bme680_t *dev, char unit)
	Retrieve the estimated altitude from the last read of the BME680 device. More...

Detailed Description

Sensor driver for the Bosch BME680 air quality sensor. This library supports i2c and 4-wire SPI connections, reads temperature, pressure, relative humidity, and VOC levels, and provides limited support for adjusting the sensors settings.

Author

Matthew Matz

Version

0.5

Copyright

Copyright (C) Parallax, Inc. 2019. All Rights MIT Licensed.

Function Documentation

bme680_altitude()

float bme680_altitude	(	bme680_t *	dev,
		char	unit
	)

Retrieve the estimated altitude from the last read of the BME680 device.

Note

this is calcualted from the pressure measurement. It is not reliable for high altitudes, and it is affected by the ambient (barometric) pressure due to weather. For that reason, the BME680 is better for measuring changes in altitude versus absolute altitude.

Parameters

*dev	Pointer to the bme680 device.
unit	Unit of meaure to return the measurement in. May be METERS or FEET.