   if (( 1 < x < 1024 ) && ( x != OLD_x )) {
     float calcVoltage = x * (5.0 / 1024.0);
     if ( (0.17 * calcVoltage - 0.1) > 0 ) {
-       dustDensity = 0.17 * calcVoltage - 0.1;
-       OLD_x = x ;
+      dustDensity = 0.17 * calcVoltage - 0.1;
+      OLD_x = x ;
     }
     // //    0 ~ 0.5
   }


}

void displaypowerAvg()
{
  lcd.setCursor(10, 2);
  if ( PW < 10 ) {
    lcd.print(" ");
    lcd.print(" ");
    lcd.print(" ");
    lcd.print(PW, 0);
   
  } else if ( 10 <= PW < 99 ) {
    lcd.print(" ");
    lcd.print(" ");
    lcd.print(PW, 0);

  } else if ( 100 <= PW < 1000 ) {
    lcd.print(" ");
    lcd.print(PW, 0);

  } else if ( PW >= 1000 ) {
    lcd.print(PW, 0);
  }

  lcd.print("W");

}

void displayNemoWeightAvg()

void checkDisplayValue() {
  if ( PW != OLD_PW )
  {
    displaypowerAvg(PW);
    OLD_PW = PW;
  }

