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Gašper Dobrovoljc
2023-03-11 15:11:03 +01:00
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lib/Adafruit_BMP280_Library/Adafruit_BMP280.cpp Normal file
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/*!
* @file Adafruit_BMP280.cpp
*
* This is a library for the BMP280 orientation sensor
*
* Designed specifically to work with the Adafruit BMP280 Sensor.
*
* Pick one up today in the adafruit shop!
* ------> https://www.adafruit.com/product/2651
*
* These sensors use I2C to communicate, 2 pins are required to interface.
*
* Adafruit invests time and resources providing this open source code,
* please support Adafruit andopen-source hardware by purchasing products
* from Adafruit!
*
* K.Townsend (Adafruit Industries)
*
* BSD license, all text above must be included in any redistribution
*/
#include "Adafruit_BMP280.h"
#include "Arduino.h"
#include <Wire.h>
/*!
* @brief BMP280 constructor using i2c
* @param *theWire
* optional wire
*/
Adafruit_BMP280::Adafruit_BMP280(TwoWire *theWire)
: _cs(-1), _mosi(-1), _miso(-1), _sck(-1) {
_wire = theWire;
}
/*!
* @brief BMP280 constructor using hardware SPI
* @param cspin
* cs pin number
* @param theSPI
* optional SPI object
*/
Adafruit_BMP280::Adafruit_BMP280(int8_t cspin, SPIClass *theSPI)
: _cs(cspin), _mosi(-1), _miso(-1), _sck(-1) {
*_spi = *theSPI;
}
/*!
* @brief BMP280 constructor using bitbang SPI
* @param cspin
* The pin to use for CS/SSEL.
* @param mosipin
* The pin to use for MOSI.
* @param misopin
* The pin to use for MISO.
* @param sckpin
* The pin to use for SCK.
*/
Adafruit_BMP280::Adafruit_BMP280(int8_t cspin, int8_t mosipin, int8_t misopin,
int8_t sckpin)
: _cs(cspin), _mosi(mosipin), _miso(misopin), _sck(sckpin) {}
/*!
* Initialises the sensor.
* @param addr
* The I2C address to use (default = 0x77)
* @param chipid
* The expected chip ID (used to validate connection).
* @return True if the init was successful, otherwise false.
*/
bool Adafruit_BMP280::begin(uint8_t addr, uint8_t chipid) {
_i2caddr = addr;
if (_cs == -1) {
// i2c
_wire->begin();
} else {
digitalWrite(_cs, HIGH);
pinMode(_cs, OUTPUT);
if (_sck == -1) {
// hardware SPI
_spi->begin();
} else {
// software SPI
pinMode(_sck, OUTPUT);
pinMode(_mosi, OUTPUT);
pinMode(_miso, INPUT);
}
}
if (read8(BMP280_REGISTER_CHIPID) != chipid)
return false;
readCoefficients();
// write8(BMP280_REGISTER_CONTROL, 0x3F); /* needed? */
setSampling();
delay(100);
return true;
}
/*!
* Sets the sampling config for the device.
* @param mode
* The operating mode of the sensor.
* @param tempSampling
* The sampling scheme for temp readings.
* @param pressSampling
* The sampling scheme for pressure readings.
* @param filter
* The filtering mode to apply (if any).
* @param duration
* The sampling duration.
*/
void Adafruit_BMP280::setSampling(sensor_mode mode,
sensor_sampling tempSampling,
sensor_sampling pressSampling,
sensor_filter filter,
standby_duration duration) {
_measReg.mode = mode;
_measReg.osrs_t = tempSampling;
_measReg.osrs_p = pressSampling;
_configReg.filter = filter;
_configReg.t_sb = duration;
write8(BMP280_REGISTER_CONFIG, _configReg.get());
write8(BMP280_REGISTER_CONTROL, _measReg.get());
}
uint8_t Adafruit_BMP280::spixfer(uint8_t x) {
if (_sck == -1)
return SPI.transfer(x);
// software spi
// Serial.println("Software SPI");
uint8_t reply = 0;
for (int i = 7; i >= 0; i--) {
reply <<= 1;
digitalWrite(_sck, LOW);
digitalWrite(_mosi, x & (1 << i));
digitalWrite(_sck, HIGH);
if (digitalRead(_miso))
reply |= 1;
}
return reply;
}
/**************************************************************************/
/*!
@brief Writes an 8 bit value over I2C/SPI
*/
/**************************************************************************/
void Adafruit_BMP280::write8(byte reg, byte value) {
if (_cs == -1) {
_wire->beginTransmission((uint8_t)_i2caddr);
_wire->write((uint8_t)reg);
_wire->write((uint8_t)value);
_wire->endTransmission();
} else {
if (_sck == -1)
_spi->beginTransaction(SPISettings(500000, MSBFIRST, SPI_MODE0));
digitalWrite(_cs, LOW);
spixfer(reg & ~0x80); // write, bit 7 low
spixfer(value);
digitalWrite(_cs, HIGH);
if (_sck == -1)
_spi->endTransaction(); // release the SPI bus
}
}
/*!
* @brief Reads an 8 bit value over I2C/SPI
* @param reg
* selected register
* @return value from selected register
*/
uint8_t Adafruit_BMP280::read8(byte reg) {
uint8_t value;
if (_cs == -1) {
_wire->beginTransmission((uint8_t)_i2caddr);
_wire->write((uint8_t)reg);
_wire->endTransmission();
_wire->requestFrom((uint8_t)_i2caddr, (byte)1);
value = _wire->read();
} else {
if (_sck == -1)
_spi->beginTransaction(SPISettings(500000, MSBFIRST, SPI_MODE0));
digitalWrite(_cs, LOW);
spixfer(reg | 0x80); // read, bit 7 high
value = spixfer(0);
digitalWrite(_cs, HIGH);
if (_sck == -1)
_spi->endTransaction(); // release the SPI bus
}
return value;
}
/*!
* @brief Reads a 16 bit value over I2C/SPI
*/
uint16_t Adafruit_BMP280::read16(byte reg) {
uint16_t value;
if (_cs == -1) {
_wire->beginTransmission((uint8_t)_i2caddr);
_wire->write((uint8_t)reg);
_wire->endTransmission();
_wire->requestFrom((uint8_t)_i2caddr, (byte)2);
value = (_wire->read() << 8) | _wire->read();
} else {
if (_sck == -1)
_spi->beginTransaction(SPISettings(500000, MSBFIRST, SPI_MODE0));
digitalWrite(_cs, LOW);
spixfer(reg | 0x80); // read, bit 7 high
value = (spixfer(0) << 8) | spixfer(0);
digitalWrite(_cs, HIGH);
if (_sck == -1)
_spi->endTransaction(); // release the SPI bus
}
return value;
}
uint16_t Adafruit_BMP280::read16_LE(byte reg) {
uint16_t temp = read16(reg);
return (temp >> 8) | (temp << 8);
}
/*!
* @brief Reads a signed 16 bit value over I2C/SPI
*/
int16_t Adafruit_BMP280::readS16(byte reg) { return (int16_t)read16(reg); }
int16_t Adafruit_BMP280::readS16_LE(byte reg) {
return (int16_t)read16_LE(reg);
}
/*!
* @brief Reads a 24 bit value over I2C/SPI
*/
uint32_t Adafruit_BMP280::read24(byte reg) {
uint32_t value;
if (_cs == -1) {
_wire->beginTransmission((uint8_t)_i2caddr);
_wire->write((uint8_t)reg);
_wire->endTransmission();
_wire->requestFrom((uint8_t)_i2caddr, (byte)3);
value = _wire->read();
value <<= 8;
value |= _wire->read();
value <<= 8;
value |= _wire->read();
} else {
if (_sck == -1)
_spi->beginTransaction(SPISettings(500000, MSBFIRST, SPI_MODE0));
digitalWrite(_cs, LOW);
spixfer(reg | 0x80); // read, bit 7 high
value = spixfer(0);
value <<= 8;
value |= spixfer(0);
value <<= 8;
value |= spixfer(0);
digitalWrite(_cs, HIGH);
if (_sck == -1)
_spi->endTransaction(); // release the SPI bus
}
return value;
}
/*!
* @brief Reads the factory-set coefficients
*/
void Adafruit_BMP280::readCoefficients() {
_bmp280_calib.dig_T1 = read16_LE(BMP280_REGISTER_DIG_T1);
_bmp280_calib.dig_T2 = readS16_LE(BMP280_REGISTER_DIG_T2);
_bmp280_calib.dig_T3 = readS16_LE(BMP280_REGISTER_DIG_T3);
_bmp280_calib.dig_P1 = read16_LE(BMP280_REGISTER_DIG_P1);
_bmp280_calib.dig_P2 = readS16_LE(BMP280_REGISTER_DIG_P2);
_bmp280_calib.dig_P3 = readS16_LE(BMP280_REGISTER_DIG_P3);
_bmp280_calib.dig_P4 = readS16_LE(BMP280_REGISTER_DIG_P4);
_bmp280_calib.dig_P5 = readS16_LE(BMP280_REGISTER_DIG_P5);
_bmp280_calib.dig_P6 = readS16_LE(BMP280_REGISTER_DIG_P6);
_bmp280_calib.dig_P7 = readS16_LE(BMP280_REGISTER_DIG_P7);
_bmp280_calib.dig_P8 = readS16_LE(BMP280_REGISTER_DIG_P8);
_bmp280_calib.dig_P9 = readS16_LE(BMP280_REGISTER_DIG_P9);
}
/*!
* Reads the temperature from the device.
* @return The temperature in degress celcius.
*/
float Adafruit_BMP280::readTemperature() {
int32_t var1, var2;
int32_t adc_T = read24(BMP280_REGISTER_TEMPDATA);
adc_T >>= 4;
var1 = ((((adc_T >> 3) - ((int32_t)_bmp280_calib.dig_T1 << 1))) *
((int32_t)_bmp280_calib.dig_T2)) >>
11;
var2 = (((((adc_T >> 4) - ((int32_t)_bmp280_calib.dig_T1)) *
((adc_T >> 4) - ((int32_t)_bmp280_calib.dig_T1))) >>
12) *
((int32_t)_bmp280_calib.dig_T3)) >>
14;
t_fine = var1 + var2;
float T = (t_fine * 5 + 128) >> 8;
return T / 100;
}
/*!
* Reads the barometric pressure from the device.
* @return Barometric pressure in hPa.
*/
float Adafruit_BMP280::readPressure() {
int64_t var1, var2, p;
// Must be done first to get the t_fine variable set up
readTemperature();
int32_t adc_P = read24(BMP280_REGISTER_PRESSUREDATA);
adc_P >>= 4;
var1 = ((int64_t)t_fine) - 128000;
var2 = var1 * var1 * (int64_t)_bmp280_calib.dig_P6;
var2 = var2 + ((var1 * (int64_t)_bmp280_calib.dig_P5) << 17);
var2 = var2 + (((int64_t)_bmp280_calib.dig_P4) << 35);
var1 = ((var1 * var1 * (int64_t)_bmp280_calib.dig_P3) >> 8) +
((var1 * (int64_t)_bmp280_calib.dig_P2) << 12);
var1 =
(((((int64_t)1) << 47) + var1)) * ((int64_t)_bmp280_calib.dig_P1) >> 33;
if (var1 == 0) {
return 0; // avoid exception caused by division by zero
}
p = 1048576 - adc_P;
p = (((p << 31) - var2) * 3125) / var1;
var1 = (((int64_t)_bmp280_calib.dig_P9) * (p >> 13) * (p >> 13)) >> 25;
var2 = (((int64_t)_bmp280_calib.dig_P8) * p) >> 19;
p = ((p + var1 + var2) >> 8) + (((int64_t)_bmp280_calib.dig_P7) << 4);
return (float)p / 256;
}
/*!
* @brief Calculates the approximate altitude using barometric pressure and the
* supplied sea level hPa as a reference.
* @param seaLevelhPa
* The current hPa at sea level.
* @return The approximate altitude above sea level in meters.
*/
float Adafruit_BMP280::readAltitude(float seaLevelhPa) {
float altitude;
float pressure = readPressure(); // in Si units for Pascal
pressure /= 100;
altitude = 44330 * (1.0 - pow(pressure / seaLevelhPa, 0.1903));
return altitude;
}
/*!
* @brief Take a new measurement (only possible in forced mode)
* !!!todo!!!
*/
/*
void Adafruit_BMP280::takeForcedMeasurement()
{
// If we are in forced mode, the BME sensor goes back to sleep after each
// measurement and we need to set it to forced mode once at this point, so
// it will take the next measurement and then return to sleep again.
// In normal mode simply does new measurements periodically.
if (_measReg.mode == MODE_FORCED) {
// set to forced mode, i.e. "take next measurement"
write8(BMP280_REGISTER_CONTROL, _measReg.get());
// wait until measurement has been completed, otherwise we would read
// the values from the last measurement
while (read8(BMP280_REGISTER_STATUS) & 0x08)
delay(1);
}
}
*/

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/*!
* @file Adafruit_BMP280.h
*
* This is a library for the Adafruit BMP280 Breakout.
*
* Designed specifically to work with the Adafruit BMP280 Breakout.
*
* Pick one up today in the adafruit shop!
* ------> https://www.adafruit.com/product/2651
*
* These sensors use I2C to communicate, 2 pins are required to interface.
*
* Adafruit invests time and resources providing this open source code,
* please support Adafruit andopen-source hardware by purchasing products
* from Adafruit!
*
* K.Townsend (Adafruit Industries)
*
* BSD license, all text above must be included in any redistribution
*/
#ifndef __BMP280_H__
#define __BMP280_H__
#include "Arduino.h"
#include <Wire.h>
#include <SPI.h>
/*!
* I2C ADDRESS/BITS/SETTINGS
*/
#define BMP280_ADDRESS (0x77) /**< The default I2C address for the sensor. */
#define BMP280_ADDRESS_ALT \
(0x76) /**< Alternative I2C address for the sensor. */
#define BMP280_CHIPID (0x58) /**< Default chip ID. */
/*!
* Registers available on the sensor.
*/
enum {
BMP280_REGISTER_DIG_T1 = 0x88,
BMP280_REGISTER_DIG_T2 = 0x8A,
BMP280_REGISTER_DIG_T3 = 0x8C,
BMP280_REGISTER_DIG_P1 = 0x8E,
BMP280_REGISTER_DIG_P2 = 0x90,
BMP280_REGISTER_DIG_P3 = 0x92,
BMP280_REGISTER_DIG_P4 = 0x94,
BMP280_REGISTER_DIG_P5 = 0x96,
BMP280_REGISTER_DIG_P6 = 0x98,
BMP280_REGISTER_DIG_P7 = 0x9A,
BMP280_REGISTER_DIG_P8 = 0x9C,
BMP280_REGISTER_DIG_P9 = 0x9E,
BMP280_REGISTER_CHIPID = 0xD0,
BMP280_REGISTER_VERSION = 0xD1,
BMP280_REGISTER_SOFTRESET = 0xE0,
BMP280_REGISTER_CAL26 = 0xE1, /**< R calibration = 0xE1-0xF0 */
BMP280_REGISTER_CONTROL = 0xF4,
BMP280_REGISTER_CONFIG = 0xF5,
BMP280_REGISTER_PRESSUREDATA = 0xF7,
BMP280_REGISTER_TEMPDATA = 0xFA,
};
/*!
* Struct to hold calibration data.
*/
typedef struct {
uint16_t dig_T1; /**< dig_T1 cal register. */
int16_t dig_T2; /**< dig_T2 cal register. */
int16_t dig_T3; /**< dig_T3 cal register. */
uint16_t dig_P1; /**< dig_P1 cal register. */
int16_t dig_P2; /**< dig_P2 cal register. */
int16_t dig_P3; /**< dig_P3 cal register. */
int16_t dig_P4; /**< dig_P4 cal register. */
int16_t dig_P5; /**< dig_P5 cal register. */
int16_t dig_P6; /**< dig_P6 cal register. */
int16_t dig_P7; /**< dig_P7 cal register. */
int16_t dig_P8; /**< dig_P8 cal register. */
int16_t dig_P9; /**< dig_P9 cal register. */
uint8_t dig_H1; /**< dig_H1 cal register. */
int16_t dig_H2; /**< dig_H2 cal register. */
uint8_t dig_H3; /**< dig_H3 cal register. */
int16_t dig_H4; /**< dig_H4 cal register. */
int16_t dig_H5; /**< dig_H5 cal register. */
int8_t dig_H6; /**< dig_H6 cal register. */
} bmp280_calib_data;
/**
* Driver for the Adafruit BMP280 barometric pressure sensor.
*/
class Adafruit_BMP280 {
public:
/** Oversampling rate for the sensor. */
enum sensor_sampling {
/** No over-sampling. */
SAMPLING_NONE = 0x00,
/** 1x over-sampling. */
SAMPLING_X1 = 0x01,
/** 2x over-sampling. */
SAMPLING_X2 = 0x02,
/** 4x over-sampling. */
SAMPLING_X4 = 0x03,
/** 8x over-sampling. */
SAMPLING_X8 = 0x04,
/** 16x over-sampling. */
SAMPLING_X16 = 0x05
};
/** Operating mode for the sensor. */
enum sensor_mode {
/** Sleep mode. */
MODE_SLEEP = 0x00,
/** Forced mode. */
MODE_FORCED = 0x01,
/** Normal mode. */
MODE_NORMAL = 0x03,
/** Software reset. */
MODE_SOFT_RESET_CODE = 0xB6
};
/** Filtering level for sensor data. */
enum sensor_filter {
/** No filtering. */
FILTER_OFF = 0x00,
/** 2x filtering. */
FILTER_X2 = 0x01,
/** 4x filtering. */
FILTER_X4 = 0x02,
/** 8x filtering. */
FILTER_X8 = 0x03,
/** 16x filtering. */
FILTER_X16 = 0x04
};
/** Standby duration in ms */
enum standby_duration {
/** 1 ms standby. */
STANDBY_MS_1 = 0x00,
/** 63 ms standby. */
STANDBY_MS_63 = 0x01,
/** 125 ms standby. */
STANDBY_MS_125 = 0x02,
/** 250 ms standby. */
STANDBY_MS_250 = 0x03,
/** 500 ms standby. */
STANDBY_MS_500 = 0x04,
/** 1000 ms standby. */
STANDBY_MS_1000 = 0x05,
/** 2000 ms standby. */
STANDBY_MS_2000 = 0x06,
/** 4000 ms standby. */
STANDBY_MS_4000 = 0x07
};
Adafruit_BMP280(TwoWire *theWire = &Wire);
Adafruit_BMP280(int8_t cspin, SPIClass *theSPI = &SPI);
Adafruit_BMP280(int8_t cspin, int8_t mosipin, int8_t misopin, int8_t sckpin);
bool begin(uint8_t addr = BMP280_ADDRESS, uint8_t chipid = BMP280_CHIPID);
float readTemperature();
float readPressure(void);
float readAltitude(float seaLevelhPa = 1013.25);
// void takeForcedMeasurement();
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);
TwoWire *_wire; /**< Wire object */
SPIClass *_spi; /**< SPI object */
private:
/** Encapsulates the config register */
struct config {
/** Inactive duration (standby time) in normal mode */
unsigned int t_sb : 3;
/** Filter settings */
unsigned int filter : 3;
/** Unused - don't set */
unsigned int none : 1;
/** Enables 3-wire SPI */
unsigned int spi3w_en : 1;
/** Used to retrieve the assembled config register's byte value. */
unsigned int get() { return (t_sb << 5) | (filter << 2) | spi3w_en; }
};
/** Encapsulates trhe ctrl_meas register */
struct ctrl_meas {
/** Temperature oversampling. */
unsigned int osrs_t : 3;
/** Pressure oversampling. */
unsigned int osrs_p : 3;
/** Device mode */
unsigned int mode : 2;
/** Used to retrieve the assembled ctrl_meas register's byte value. */
unsigned int get() { return (osrs_t << 5) | (osrs_p << 2) | mode; }
};
void readCoefficients(void);
uint8_t spixfer(uint8_t x);
void write8(byte reg, byte value);
uint8_t read8(byte reg);
uint16_t read16(byte reg);
uint32_t read24(byte reg);
int16_t readS16(byte reg);
uint16_t read16_LE(byte reg);
int16_t readS16_LE(byte reg);
uint8_t _i2caddr;
int32_t _sensorID;
int32_t t_fine;
int8_t _cs, _mosi, _miso, _sck;
bmp280_calib_data _bmp280_calib;
config _configReg;
ctrl_meas _measReg;
};
#endif

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# Adafruit BMP280 Driver (Barometric Pressure Sensor) [![Build Status](https://travis-ci.org/adafruit/Adafruit_BMP280_Library.svg?branch=master)](https://travis-ci.org/adafruit/Adafruit_BMP280_Library)
This driver is for the [Adafruit BMP280 Breakout](http://www.adafruit.com/products/2651)
<a href="https://www.adafruit.com/product/2651"><img src="assets/board.jpg" width="500"/></a>
## About the BMP280 ##
This precision sensor from Bosch is the best low-cost sensing solution for measuring barometric pressure and temperature. Because pressure changes with altitude you can also use it as an altimeter!
## About this Driver ##
Adafruit invests time and resources providing this open source code. Please support Adafruit and open-source hardware by purchasing products from Adafruit!
Written by Kevin (KTOWN) Townsend for Adafruit Industries.
<!-- START COMPATIBILITY TABLE -->
## Compatibility
MCU | Tested Works | Doesn't Work | Not Tested | Notes
------------------ | :----------: | :----------: | :---------: | -----
Atmega328 @ 16MHz | X | | |
Atmega328 @ 12MHz | X | | |
Atmega32u4 @ 16MHz | X | | | Use SDA/SCL on pins D2 &amp; D3
Atmega32u4 @ 8MHz | X | | | Use SDA/SCL on pins D2 &amp; D3
ESP8266 | X | | | SDA/SCL default to pins 4 &amp; 5 but any two pins can be assigned as SDA/SCL using Wire.begin(SDA,SCL)
Atmega2560 @ 16MHz | X | | | Use SDA/SCL on pins 20 &amp; 21
ATSAM3X8E | X | | | Use SDA/SCL on pins 20 &amp; 21
ATSAM21D | X | | |
ATtiny85 @ 16MHz | | X | |
ATtiny85 @ 8MHz | | X | |
Intel Curie @ 32MHz | | | X |
STM32F2 | | | X |
* ATmega328 @ 16MHz : Arduino UNO, Adafruit Pro Trinket 5V, Adafruit Metro 328, Adafruit Metro Mini
* ATmega328 @ 12MHz : Adafruit Pro Trinket 3V
* ATmega32u4 @ 16MHz : Arduino Leonardo, Arduino Micro, Arduino Yun, Teensy 2.0
* ATmega32u4 @ 8MHz : Adafruit Flora, Bluefruit Micro
* ESP8266 : Adafruit Huzzah
* ATmega2560 @ 16MHz : Arduino Mega
* ATSAM3X8E : Arduino Due
* ATSAM21D : Arduino Zero, M0 Pro
* ATtiny85 @ 16MHz : Adafruit Trinket 5V
* ATtiny85 @ 8MHz : Adafruit Gemma, Arduino Gemma, Adafruit Trinket 3V
<!-- END COMPATIBILITY TABLE -->

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lib/Adafruit_BMP280_Library/examples/bmp280test/bmp280test.ino Normal file
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/***************************************************************************
This is a library for the BMP280 humidity, temperature & pressure sensor
Designed specifically to work with the Adafruit BMEP280 Breakout
----> http://www.adafruit.com/products/2651
These sensors use I2C or SPI to communicate, 2 or 4 pins are required
to interface.
Adafruit invests time and resources providing this open source code,
please support Adafruit andopen-source hardware by purchasing products
from Adafruit!
Written by Limor Fried & Kevin Townsend for Adafruit Industries.
BSD license, all text above must be included in any redistribution
***************************************************************************/
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_BMP280.h>
#define BMP_SCK (13)
#define BMP_MISO (12)
#define BMP_MOSI (11)
#define BMP_CS (10)
Adafruit_BMP280 bmp; // I2C
//Adafruit_BMP280 bmp(BMP_CS); // hardware SPI
//Adafruit_BMP280 bmp(BMP_CS, BMP_MOSI, BMP_MISO, BMP_SCK);
void setup() {
Serial.begin(9600);
Serial.println(F("BMP280 test"));
if (!bmp.begin()) {
Serial.println(F("Could not find a valid BMP280 sensor, check wiring!"));
while (1);
}
/* Default settings from datasheet. */
bmp.setSampling(Adafruit_BMP280::MODE_NORMAL, /* Operating Mode. */
Adafruit_BMP280::SAMPLING_X2, /* Temp. oversampling */
Adafruit_BMP280::SAMPLING_X16, /* Pressure oversampling */
Adafruit_BMP280::FILTER_X16, /* Filtering. */
Adafruit_BMP280::STANDBY_MS_500); /* Standby time. */
}
void loop() {
Serial.print(F("Temperature = "));
Serial.print(bmp.readTemperature());
Serial.println(" *C");
Serial.print(F("Pressure = "));
Serial.print(bmp.readPressure());
Serial.println(" Pa");
Serial.print(F("Approx altitude = "));
Serial.print(bmp.readAltitude(1013.25)); /* Adjusted to local forecast! */
Serial.println(" m");
Serial.println();
delay(2000);
}

9
lib/Adafruit_BMP280_Library/library.properties Normal file
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@@ -0,0 +1,9 @@
name=Adafruit BMP280 Library
version=1.0.3
author=Adafruit
maintainer=Adafruit <info@adafruit.com>
sentence=Arduino library for BMP280 sensors.
paragraph=Arduino library for BMP280 pressure and altitude sensors.
category=Sensors
url=https://github.com/adafruit/Adafruit_BMP280_Library
architectures=*