#include <Wire.h>

const int ADDR =0x40;
int X0,X1,Y0,Y1,Y2,Y3;
double X,Y,X_out,Y_out1,Y_out2;

void setup()
{
Serial.begin(9600);
Wire.begin();
delay(100);
Wire.beginTransmission(ADDR);
Wire.endTransmission();
pinMode(13,OUTPUT);
}
void loop()
{
/**Send command of initiating temperature measurement**/
Wire.beginTransmission(ADDR);
Wire.write(0xE3);
Wire.endTransmission();

Serial.print("Temp");
Serial.print("\t");
Serial.println("RH");

/**Read data of temperature**/
digitalWrite(13,HIGH);
Wire.requestFrom(ADDR,2);

if(Wire.available()<=2);
{
X0 = Wire.read();
X1 = Wire.read();
X0 = X0<<8;
X_out = X0+X1;
}

/**Calculate and display temperature**/
X=(175.72*X_out)/65536;
X=X-46.85;
Serial.print(X);
Serial.print("C");
Serial.print("\t");

/**Send command of initiating relative humidity measurement**/
Wire.beginTransmission(ADDR);
Wire.write(0xE5);
Wire.endTransmission();

/**Read data of relative humidity**/
Wire.requestFrom(ADDR,2);
if(Wire.available()<=2);
{
Y0 = Wire.read();
Y2=Y0/100;
Y0=Y0%100;
Y1 = Wire.read();
Y_out1 = Y2*25600;
Y_out2 = Y0*256+Y1;
}

/**Calculate and display relative humidity**/
Y_out1 = (125*Y_out1)/65536;
Y_out2 = (125*Y_out2)/65536;
Y = Y_out1+Y_out2;
Y=Y-6;
Serial.print(Y);
Serial.println("%");

digitalWrite(13,LOW);
delay(300);
}