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