float HTU21D::readFourthTemperature(void)
{
SoftI2CMaster i2c4 = SoftI2CMaster( sdaPin4, sclPin4 );
byte tLow, tHigh, checkSum;
//Request the temperature
i2c4.beginTransmission(HTU21D_ADDR);
i2c4.send(TRIGGER_TEMP_MEASURE_NOHOLD);
//Hang out while measurement is taken. 50ms max, page 4 of datasheet.
delay(55);
//Comes back in three bytes, data(MSB) / data(LSB) / Checksum
i2c4.requestFrom(HTU21D_ADDR);
//Receive msb, lsb and checksum
tHigh=i2c4.receive(false);
tLow=i2c4.receive(false);
checkSum=i2c4.receive(true);
i2c4.endTransmission();
unsigned int rawTemp = ((unsigned int) tHigh <<8) | (unsigned int) tLow;
rawTemp &= 0xFFFC;
//Given the raw tempuerature data, calculate the actual relative tempuerature
float temp = rawTemp/(float)65536;
float realTemp = -46.85 + (175.72 * temp);
return realTemp;
}
TCS34725::TCS34725(tcs34725IntegrationTime_t it, tcs34725Gain_t gain, uint8_t sdaPin, uint8_t sclPin)
{
_tcs34725Initialised = false;
_tcs34725IntegrationTime = it;
_tcs34725Gain = gain;
_sdaPin = sdaPin;
_sclPin = sclPin;
_i2c = SoftI2CMaster(sdaPin, sclPin);
}
float HTU21D::readSecondHumidity(void)
{
SoftI2CMaster i2c2 = SoftI2CMaster( sdaPin2, sclPin2 );
byte hLow, hHigh, checkSum;
//Request a humidity reading
i2c2.beginTransmission(HTU21D_ADDR);
i2c2.send(TRIGGER_HUMD_MEASURE_NOHOLD); ////Measure humidity with no bus holding
//Hang out while measurement is taken. Delay 50ms min, page 4 of datasheet.
delay(55);
//Comes back in three bytes, data(MSB) / data(LSB) / Checksum
i2c2.requestFrom(HTU21D_ADDR);
//Receive msb, lsb and checksum
hHigh=i2c2.receive(false);
hLow=i2c2.receive(false);
checkSum=i2c2.receive(true);
i2c2.endTransmission();
unsigned int rawHumidity = ((unsigned int) hHigh << 8) | (unsigned int) hLow;
rawHumidity &= 0xFFFC; //Zero out the status bits but keep them in place
//Given the raw humidity data, calculate the actual relative humidity
float tempRH = rawHumidity / (float)65536; //2^16 = 65536
float rh = -6 + (125 * tempRH); //From page 14
if(rh>100)
rh=100;
if(rh<0)
rh=0;
return rh;
}
*/ #include <inttypes.h> #include <Wire.h> #include "Arduino.h" #include "SHT2x.h" // #define SOFTI2C #ifdef SOFTI2C #include "SoftI2CMaster.h" //matt #define I2C i2c //Matt (Choose between "Wire" and "SoftI2C" ) const byte sdaPin = 4; const byte sclPin = 5; SoftI2CMaster i2c = SoftI2CMaster( sdaPin,sclPin ); #else #define I2C Wire #endif /****************************************************************************** * Global Functions ******************************************************************************/ /********************************************************** * GetHumidity * Gets the current humidity from the sensor. * * @return float - The relative humidity in %RH **********************************************************/
please support Adafruit andopen-source hardware by purchasing products from Adafruit! Written by Kevin Townsend 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 <SoftI2CMaster.h> #include <limits.h> #include <math.h> SoftI2CMaster i2c = SoftI2CMaster(); #include "Adafruit_10DOF_SOFT.h" #define PI (3.14159265F); /*************************************************************************** PRIVATE FUNCTIONS ***************************************************************************/ /*************************************************************************** CONSTRUCTOR ***************************************************************************/ /**************************************************************************/ /*!
