/*
 * si7021 library
 * SI7021 Temperature and Humidity Sensor @ ESP32 i2c
 *
 * copyright: Jannik Beyerstedt | http://jannikbeyerstedt.de | code@jannikbeyerstedt.de
 * license: http://www.gnu.org/licenses/gpl-3.0.txt GPLv3 License
 */

#ifndef SI7021_H
#define SI7021_H

#include <cstdint>

#define SI7021_DEFAULT_ADDRESS (0x40)

#define SI7021_MEASRH_HOLD_CMD 0xE5
#define SI7021_MEASTEMP_HOLD_CMD 0xE3
#define SI7021_MEASRH_NOHOLD_CMD 0xF5
#define SI7021_MEASTEMP_NOHOLD_CMD 0xF3
#define SI7021_READPREVTEMP_CMD 0xE0
#define SI7021_RESET_CMD 0xFE
#define SI7021_READRHT_REG_CMD 0xE7
// #define SI7021_WRITERHT_REG_CMD 0xE6
// #define SI7021_READHEATER_REG_CMD 0x11
// #define SI7021_WRITEHEATER_REG_CMD 0x51
// #define SI7021_ID1_CMD 0xFA0F
// #define SI7021_ID2_CMD 0xFCC9
// #define SI7021_FIRMVERS_CMD 0x84B8

class Si7021 {
public:
  Si7021(void);
  bool begin(void);
  void reset(void);

  bool  measure(void);
  float temperature;
  float humidity;

private:
  // void    writeRegister8(uint8_t reg, uint8_t value);
  uint8_t readRegister8(uint8_t reg);

  int8_t _i2caddr;
};

#endif  // SI7021_H