esp32-sensornode/main/si7021.hpp

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/*
* 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