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/*
* Copyright 2020 Daniel Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#ifndef AM2320_H
#define AM2320_H
/**
* Driver for AM2320 I2C Temperature and Humidity Sensor.
* The sensor is in a low-power sleep mode by default. The read() function
* causes it to wake up, perform a single temperature and humidity reading, and
* go back to sleeep. Afterwards, the results can be read using getStatus(),
* getTemp(), and getHumidity().
*/
class AM2320 {
private:
AM2320(const AM2320 ©);
unsigned char const address;
unsigned char txbuf[3];
unsigned char rxbuf[8];
public:
/**
* The constructor does nothing.
* @param addr AM2320 I2C address
*/
AM2320(unsigned char const addr) : address(addr) {}
/**
* Perform a single temperature and humidity measurement. Afterwards,
* the readings can be accessed using getTemp() and getHumidity().
*/
void read();
/**
* Check whether the latest read() operation returned valid data.
* @return 0 if valid, non-zero otherwise
*/
unsigned char getStatus();
/**
* Return temperature measured by latest read() call.
* @return temperature [degree celsius]
*/
float getTemp();
/**
* Return humidity measured by latest read() call.
* @return relative humidity [percent]
*/
float getHumidity();
};
extern AM2320 am2320;
#endif
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