osd-contiki/examples/osd/arduino-htu21/Adafruit_HTU21DF_Library-master/Adafruit_HTU21DF.h
2015-11-29 22:34:24 +01:00

45 lines
1.2 KiB
C++

/***************************************************
This is a library for the HTU21D-F Humidity & Temp Sensor
Designed specifically to work with the HTU21D-F sensor from Adafruit
----> https://www.adafruit.com/products/1899
These displays use I2C to communicate, 2 pins are required to
interface
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, all text above must be included in any redistribution
****************************************************/
#if (ARDUINO >= 100)
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
#include "Wire.h"
#define HTU21DF_I2CADDR 0x40
#define HTU21DF_READTEMP 0xE3
#define HTU21DF_READHUM 0xE5
#define HTU21DF_WRITEREG 0xE6
#define HTU21DF_READREG 0xE7
#define HTU21DF_RESET 0xFE
class Adafruit_HTU21DF {
public:
Adafruit_HTU21DF();
boolean begin(void);
float readTemperature(void);
float readHumidity(void);
void reset(void);
private:
boolean readData(void);
float humidity, temp;
};