เซ็นเซอร์วัดอุณหภูมิ วัดความชื้น ความแม่นยำสูง GY-213V-SI7021 Digital High Precision Temperature and Humidity Sensor Module

Must use 3v3 for Vin

 
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();
}
 
void loop()
{
/**Send command of initiating temperature measurement**/
Wire.beginTransmission(ADDR);
Wire.write(0xE3);
Wire.endTransmission();
 
Serial.print("Temp");
Serial.print("\t");
Serial.println("Humidity");
 
/**Read data of temperature**/
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("%");
delay(300);
 
 
Serial.println();
delay(1000);
 
}