 
 // Conductivity sensor (EC) uses pin 47 and disables pins 9, 10, 44, 45, 46.
 
-// Offset values
-const float ORP_OFFSET = 0.0;
-const float SYSTEM_VOLTAGE = 5.0;
-
 // pH calibration values, need to be filled with values measured at the
 // calibration program
 float phStep = 75.33; // Update this value!!!

  delay(500);
  digitalWrite(S2_EN, LOW);
  delay(1000);
  orp = (30.0 * SYSTEM_VOLTAGE * 1000.0) - (75.0 * analogRead(ORP_PIN) *
      SYSTEM_VOLTAGE * 1000 / 1024.0);
  orp = (orp / 75.0) - ORP_OFFSET;
  digitalWrite(S2_EN, HIGH);
#endif // ORP_SENSOR


// calibration program
float ecStep = 2.27; // Update this value!!!
uint16_t ec5kCal = 12315; // Update this value!!!

// ORP calibration values, need to be filled with values measured at the
// calibration program
uint16_t orpOffset = 12315; // Update this value!!!

MPL3115A2 myPressure; // Create an instance of the pressure sensor
HTU21D myHumidity; // Create an instance of the humidity sensor
