#include <Adafruit_BMP280.h>

Public Types
enum	sensor_sampling { SAMPLING_NONE = 0x00, SAMPLING_X1 = 0x01, SAMPLING_X2 = 0x02, SAMPLING_X4 = 0x03, SAMPLING_X8 = 0x04, SAMPLING_X16 = 0x05 }

enum	sensor_mode { MODE_SLEEP = 0x00, MODE_FORCED = 0x01, MODE_NORMAL = 0x03, MODE_SOFT_RESET_CODE = 0xB6 }

enum	sensor_filter { FILTER_OFF = 0x00, FILTER_X2 = 0x01, FILTER_X4 = 0x02, FILTER_X8 = 0x03, FILTER_X16 = 0x04 }

enum	standby_duration { STANDBY_MS_1 = 0x00, STANDBY_MS_63 = 0x01, STANDBY_MS_125 = 0x02, STANDBY_MS_250 = 0x03, STANDBY_MS_500 = 0x04, STANDBY_MS_1000 = 0x05, STANDBY_MS_2000 = 0x06, STANDBY_MS_4000 = 0x07 }

Public Member Functions
	Adafruit_BMP280 (TwoWire *theWire=&Wire)
	BMP280 constructor using i2c. More...

	Adafruit_BMP280 (int8_t cspin, SPIClass *theSPI=&SPI)
	BMP280 constructor using hardware SPI. More...

	Adafruit_BMP280 (int8_t cspin, int8_t mosipin, int8_t misopin, int8_t sckpin)
	BMP280 constructor using bitbang SPI. More...

bool	begin (uint8_t addr=BMP280_ADDRESS, uint8_t chipid=BMP280_CHIPID)

void	reset (void)
	Resets the chip via soft reset.

uint8_t	getStatus (void)
	Gets the most recent sensor event from the hardware status register. More...

uint8_t	sensorID (void)

float	readTemperature ()

float	readPressure (void)

float	readAltitude (float seaLevelhPa=1013.25)
	Calculates the approximate altitude using barometric pressure and the supplied sea level hPa as a reference. More...

float	seaLevelForAltitude (float altitude, float atmospheric)

float	waterBoilingPoint (float pressure)
	calculates the boiling point of water by a given pressure More...

bool	takeForcedMeasurement ()
	Take a new measurement (only possible in forced mode) More...

Adafruit_Sensor *	getTemperatureSensor (void)
	Gets an Adafruit Unified Sensor object for the temp sensor component. More...

Adafruit_Sensor *	getPressureSensor (void)
	Gets an Adafruit Unified Sensor object for the pressure sensor component. More...

void	setSampling (sensor_mode mode=MODE_NORMAL, sensor_sampling tempSampling=SAMPLING_X16, sensor_sampling pressSampling=SAMPLING_X16, sensor_filter filter=FILTER_OFF, standby_duration duration=STANDBY_MS_1)

Detailed Description

Driver for the Adafruit BMP280 barometric pressure sensor.

Member Enumeration Documentation

◆ sensor_sampling

enum Adafruit_BMP280::sensor_sampling

Oversampling rate for the sensor.

Enumerator
SAMPLING_NONE	No over-sampling.
SAMPLING_X1	1x over-sampling.
SAMPLING_X2	2x over-sampling.
SAMPLING_X4	4x over-sampling.
SAMPLING_X8	8x over-sampling.
SAMPLING_X16	16x over-sampling.

◆ sensor_mode

enum Adafruit_BMP280::sensor_mode

Operating mode for the sensor.

Enumerator
MODE_SLEEP	Sleep mode.
MODE_FORCED	Forced mode.
MODE_NORMAL	Normal mode.
MODE_SOFT_RESET_CODE	Software reset.

◆ sensor_filter

enum Adafruit_BMP280::sensor_filter

Filtering level for sensor data.

Enumerator
FILTER_OFF	No filtering.
FILTER_X2	2x filtering.
FILTER_X4	4x filtering.
FILTER_X8	8x filtering.
FILTER_X16	16x filtering.

◆ standby_duration

enum Adafruit_BMP280::standby_duration

Standby duration in ms

Enumerator
STANDBY_MS_1	1 ms standby.
STANDBY_MS_63	62.5 ms standby.
STANDBY_MS_125	125 ms standby.
STANDBY_MS_250	250 ms standby.
STANDBY_MS_500	500 ms standby.
STANDBY_MS_1000	1000 ms standby.
STANDBY_MS_2000	2000 ms standby.
STANDBY_MS_4000	4000 ms standby.

Constructor & Destructor Documentation

◆ Adafruit_BMP280() [1/3]

Adafruit_BMP280::Adafruit_BMP280 ( TwoWire * theWire = &Wire )

BMP280 constructor using i2c.

Parameters

*theWire optional wire

◆ Adafruit_BMP280() [2/3]

Adafruit_BMP280::Adafruit_BMP280	(	int8_t	cspin,
		SPIClass *	theSPI = `&SPI`
	)

BMP280 constructor using hardware SPI.

Parameters

cspin	cs pin number
theSPI	optional SPI object

◆ Adafruit_BMP280() [3/3]

Adafruit_BMP280::Adafruit_BMP280	(	int8_t	cspin,
		int8_t	mosipin,
		int8_t	misopin,
		int8_t	sckpin
	)

BMP280 constructor using bitbang SPI.

Parameters

cspin	The pin to use for CS/SSEL.
mosipin	The pin to use for MOSI.
misopin	The pin to use for MISO.
sckpin	The pin to use for SCK.

Member Function Documentation

◆ begin()

bool Adafruit_BMP280::begin	(	uint8_t	addr = `BMP280_ADDRESS`,
		uint8_t	chipid = `BMP280_CHIPID`
	)

Initialises the sensor.

Parameters

addr	The I2C address to use (default = 0x77)
chipid	The expected chip ID (used to validate connection).

Returns: True if the init was successful, otherwise false.

◆ getStatus()

uint8_t Adafruit_BMP280::getStatus ( void )

Gets the most recent sensor event from the hardware status register.

Returns: Sensor status as a byte.

◆ sensorID()

uint8_t Adafruit_BMP280::sensorID ( void )

Returns Sensor ID for diagnostics

Returns: 0x61 for BME680, 0x60 for BME280, 0x56, 0x57, 0x58 for BMP280

◆ readTemperature()

float Adafruit_BMP280::readTemperature ( )

Reads the temperature from the device.

Returns: The temperature in degrees celsius.

◆ readPressure()

float Adafruit_BMP280::readPressure ( void )

Reads the barometric pressure from the device.

Returns: Barometric pressure in Pa.

◆ readAltitude()

float Adafruit_BMP280::readAltitude ( float seaLevelhPa = 1013.25 )

Calculates the approximate altitude using barometric pressure and the supplied sea level hPa as a reference.

Parameters

seaLevelhPa The current hPa at sea level.

Returns: The approximate altitude above sea level in meters.

◆ seaLevelForAltitude()

float Adafruit_BMP280::seaLevelForAltitude	(	float	altitude,
		float	atmospheric
	)

Calculates the pressure at sea level (QNH) from the specified altitude, and atmospheric pressure (QFE).

Parameters

altitude	Altitude in m
atmospheric	Atmospheric pressure in hPa

Returns: The approximate pressure in hPa

◆ waterBoilingPoint()

float Adafruit_BMP280::waterBoilingPoint ( float pressure )

calculates the boiling point of water by a given pressure

Parameters

pressure pressure in hPa

Returns: temperature in °C

◆ takeForcedMeasurement()

bool Adafruit_BMP280::takeForcedMeasurement ( )

Take a new measurement (only possible in forced mode)

Returns: true if successful, otherwise false

◆ getTemperatureSensor()

Adafruit_Sensor * Adafruit_BMP280::getTemperatureSensor ( void )

Gets an Adafruit Unified Sensor object for the temp sensor component.

Returns: Adafruit_Sensor pointer to temperature sensor

◆ getPressureSensor()

Adafruit_Sensor * Adafruit_BMP280::getPressureSensor ( void )

Gets an Adafruit Unified Sensor object for the pressure sensor component.

Returns: Adafruit_Sensor pointer to pressure sensor

◆ setSampling()

void Adafruit_BMP280::setSampling	(	sensor_mode	mode = `MODE_NORMAL`,
		sensor_sampling	tempSampling = `SAMPLING_X16`,
		sensor_sampling	pressSampling = `SAMPLING_X16`,
		sensor_filter	filter = `FILTER_OFF`,
		standby_duration	duration = `STANDBY_MS_1`
	)

Sets the sampling config for the device.

Parameters

mode	The operating mode of the sensor.
tempSampling	The sampling scheme for temp readings.
pressSampling	The sampling scheme for pressure readings.
filter	The filtering mode to apply (if any).
duration	The sampling duration.

The documentation for this class was generated from the following files:

Public Types

Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ sensor_sampling

◆ sensor_mode

◆ sensor_filter

◆ standby_duration

Constructor & Destructor Documentation

◆ Adafruit_BMP280() [1/3]

◆ Adafruit_BMP280() [2/3]

◆ Adafruit_BMP280() [3/3]

Member Function Documentation

◆ begin()

◆ getStatus()

◆ sensorID()

◆ readTemperature()

◆ readPressure()

◆ readAltitude()

◆ seaLevelForAltitude()

◆ waterBoilingPoint()

◆ takeForcedMeasurement()

◆ getTemperatureSensor()

◆ getPressureSensor()

◆ setSampling()