Adafruit_AHTX0.h

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#ifndef _ADAFRUIT_AHTX0_H
#define _ADAFRUIT_AHTX0_H

#include "Arduino.h"
#include <Adafruit_BusIO_Register.h>
#include <Adafruit_I2CDevice.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>

#define AHTX0_I2CADDR_DEFAULT 0x38   
#define AHTX0_I2CADDR_ALTERNATE 0x39 
#define AHTX0_CMD_CALIBRATE 0xE1     
#define AHTX0_CMD_TRIGGER 0xAC       
#define AHTX0_CMD_SOFTRESET 0xBA     
#define AHTX0_STATUS_BUSY 0x80       
#define AHTX0_STATUS_CALIBRATED 0x08 

class Adafruit_AHTX0;

class Adafruit_AHTX0_Humidity : public Adafruit_Sensor {
public:
  Adafruit_AHTX0_Humidity(Adafruit_AHTX0 *parent) { _theAHTX0 = parent; }
  bool getEvent(sensors_event_t *);
  void getSensor(sensor_t *);

private:
  int _sensorID = 0x1020;
  Adafruit_AHTX0 *_theAHTX0 = NULL;
};

class Adafruit_AHTX0_Temp : public Adafruit_Sensor {
public:
  Adafruit_AHTX0_Temp(Adafruit_AHTX0 *parent) { _theAHTX0 = parent; }

  bool getEvent(sensors_event_t *);
  void getSensor(sensor_t *);

private:
  int _sensorID = 0x1021;
  Adafruit_AHTX0 *_theAHTX0 = NULL;
};

class Adafruit_AHTX0 {
public:
  Adafruit_AHTX0();
  ~Adafruit_AHTX0();

  bool begin(TwoWire *wire = &Wire, int32_t sensor_id = 0,
             uint8_t i2c_address = AHTX0_I2CADDR_DEFAULT);

  bool getEvent(sensors_event_t *humidity, sensors_event_t *temp);
  uint8_t getStatus(void);
  Adafruit_Sensor *getTemperatureSensor(void);
  Adafruit_Sensor *getHumiditySensor(void);

protected:
  float _temperature, 
      _humidity;      

  uint16_t _sensorid_humidity; 
  uint16_t _sensorid_temp;     

  Adafruit_I2CDevice *i2c_dev = NULL; 

  Adafruit_AHTX0_Temp *temp_sensor = NULL; 
  Adafruit_AHTX0_Humidity *humidity_sensor =
      NULL; 

private:
  void _fetchTempCalibrationValues(void);
  void _fetchHumidityCalibrationValues(void);
  friend class Adafruit_AHTX0_Temp;     
  friend class Adafruit_AHTX0_Humidity; 

  void fillTempEvent(sensors_event_t *temp, uint32_t timestamp);
  void fillHumidityEvent(sensors_event_t *humidity, uint32_t timestamp);
};

#endif