Tasmota/lib/Adafruit_SGP30-1.0.3/Adafruit_SGP30.h

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2.4 KiB
C++
Executable File

/*!
* @file Adafruit_SGP30.h
*
* This is the documentation for Adafruit's SGP30 driver for the
* Arduino platform. It is designed specifically to work with the
* Adafruit SGP30 breakout: http://www.adafruit.com/products/3709
*
* These sensors use I2C to communicate, 2 pins (SCL+SDA) are required
* to interface with the breakout.
*
* Adafruit invests time and resources providing this open source code,
* please support Adafruit and open-source hardware by purchasing
* products from Adafruit!
*
* Written by Ladyada for Adafruit Industries.
*
* BSD license, all text here must be included in any redistribution.
*
*/
#include "Arduino.h"
#include <Wire.h>
// the i2c address
#define SGP30_I2CADDR_DEFAULT 0x58 ///< SGP30 has only one I2C address
// commands and constants
#define SGP30_FEATURESET 0x0020 ///< The required set for this library
#define SGP30_CRC8_POLYNOMIAL 0x31 ///< Seed for SGP30's CRC polynomial
#define SGP30_CRC8_INIT 0xFF ///< Init value for CRC
#define SGP30_WORD_LEN 2 ///< 2 bytes per word
/**************************************************************************/
/*! Class that stores state and functions for interacting with SGP30 Gas Sensor */
/**************************************************************************/
class Adafruit_SGP30 {
public:
Adafruit_SGP30();
boolean begin(TwoWire *theWire = NULL);
boolean IAQinit(void);
boolean IAQmeasure(void);
boolean getIAQBaseline(uint16_t *eco2_base, uint16_t *tvoc_base);
boolean setIAQBaseline(uint16_t eco2_base, uint16_t tvoc_base);
boolean setHumidity(uint32_t absolute_humidity);
/**
* The last measurement of the IAQ-calculated Total Volatile Organic Compounds in ppb. This value is set when you call {@link IAQmeasure()}
*/
uint16_t TVOC;
/**
* The last measurement of the IAQ-calculated equivalent CO2 in ppm. This value is set when you call {@link IAQmeasure()}
*/
uint16_t eCO2;
/**
* The 48-bit serial number, this value is set when you call {@link begin()}
*/
uint16_t serialnumber[3];
private:
TwoWire *_i2c;
uint8_t _i2caddr;
void write(uint8_t address, uint8_t *data, uint8_t n);
void read(uint8_t address, uint8_t *data, uint8_t n);
boolean readWordFromCommand(uint8_t command[], uint8_t commandLength, uint16_t delay, uint16_t *readdata = NULL, uint8_t readlen = 0);
uint8_t generateCRC(uint8_t data[], uint8_t datalen);
};