humidity-test.c

#include <SparkFun_HIH4030.h>    //  Include header files for I2C connectivity support

#include <Wire.h>


int tempAddress = 0x48; //  I2C: TMP102 Slave Address with ADD0 grounded

float temp = 0; //  Temperature value either Static or Sensor Reading

int tempSensor = 0; //  If you are using Temperature Sensor (0 = No / 1 = YES)

#define HIH4030_OUT A0 //  Static Variables where DO (Output Pin) is connected with Arduino Analog Pin A1

#define HIH4030_SUPPLY 5 //  Static Variables where VCC is connected with Arduino 5V Pin

HIH4030 sensorSpecs(HIH4030_OUT, HIH4030_SUPPLY); // Library Variables

void setup(void) {
  Serial.begin(9600);
  Wire.begin();
}

void printData(HIH4030 sensor, float temperature) {

  Serial.print("Temperature = "); //  Print Temperature

  Serial.print(temperature);

  Serial.print(" C (");
  Serial.print((temperature * 9 / 5) + 32);
  Serial.println(" F)");

  Serial.print("Sensor Voltage = "); // Print Sensor Voltage

  Serial.print(sensor.vout());

  Serial.println(" V");

  Serial.print("Relative Humidity = "); // Print Relative Humidity

  Serial.print(sensor.getSensorRH());

  Serial.println(" %");

  Serial.print("True Relative Humidity = "); //  Print True Relative Humidity

  Serial.print(sensor.getTrueRH(temperature));

  Serial.println(" %");

  delay(2000);

}

void loop(void) { // It is for Repetitive Execution of the code

  if (tempSensor == 1)

  {

    temp = getTemperature(); // Display the value of Temperature   

  } else if (tempSensor == 0)

  {

    temp = 25; // Set the default value

  } else

  {

    while (tempSensor != 1 || tempSensor != 0) // When the temperature Sensor is neither 1 or 0

    {

      Serial.println("ERROR: tempSensor Value Out of Range"); // Print Error

    }

  }

  printData(sensorSpecs, temp); // Print Sensor Readings

  Serial.println(""); // Return Space between readings

  delay(100); // Delays the Serial Output

}

float getTemperature() { // Method to get temperature value

  Wire.requestFrom(tempAddress, 2); // It is used by master to request bytes from a slave device.The bytes may then be retrieved with the available() and read() functions.

  byte MSB = Wire.read(); //  To read the Most Significant Byte

  byte LSB = Wire.read(); //  To read the Least Significant Byte

  int TemperatureSum = ((MSB << 8) | LSB) >> 4; // Calculate the Temperature

  float celsius = TemperatureSum * 0.0625; // Convert the Temperature into Celsius

  return celsius; // Display the value of Celsius

}