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//>>> The latest version of this code can be found at https://github.com/jcw/ !!

// Port library interface to SHT11 sensors connected via "something like I2C"

// 2009-02-16 <jcw@equi4.com> http://opensource.org/licenses/mit-license.php

// $Id$

class SHT11 : public Port {

    void clock(uint8_t x) const;

    void release() const;

    uint8_t writeByte(uint8_t value) const;

    uint8_t waitAck() const;

    uint8_t readByte(uint8_t ack) const;

    void start() const;

    static void crcCalc(uint8_t x);

    static void (*crcFun)(uint8_t);

    static uint8_t crc8;

public:

    static void enableCRC();

    enum { TEMP, HUMI };

    uint16_t meas[2];

    SHT11 (uint8_t num) : Port (num) { connReset(); }

    void connReset() const;

    void softReset() const;

    uint8_t readStatus() const;

    void writeStatus(uint8_t value) const;

    uint8_t measure(uint8_t type, void (*delayFun)() =0);

#ifndef __AVR_ATtiny84__

    void calculate(float& rh_true, float& t_C) const;

    static float dewpoint(float h, float t);

#else

    //XXX TINY!

#endif

};