[edr1924]

I  adapted the Tx board software a bit so the wind direction is averaged each 15 seconds. 
Too often the wind direction is all over the place in some wind conditions...

At the receiver end I added a 5 minute averaging of the wind direction (and speed also) so when I look at the display I know for sure where the wind is coming from.

This is the Tx board software mod:

Code:

// --- For all other supported Wind Direction Sensors -----------------------
#if (WINDDIR_SENSORTYPE == 20)
double get_WindVane()
{
  windDirAverageCounter += 1;
  //Serial << windDirAverageCounter << '\t';


  analogRead(VANE_PIN); // Do 1 reading to stabilize ADC
  delay(5);

  unsigned int vane_reading = analogRead(VANE_PIN);
  //Serial.println(vane_reading);

  // calc the current wind direction
  windDirection = ((vane_reading - Min_vane_reading) * 360L) / (Max_vane_reading - Min_vane_reading);

  windDirection += WDir_offs;
  // Precaution in case the calibration values are wrong or slightly off
  if (windDirection < 0 || windDirection >= 360)
  {
    windDirection = 0;
  }

  //Serial << "Dir: " << (windDirection) << endl;

  //----------------------------------------------------------------------------
  // calculate wind direction average
  //----------------------------------------------------------------------------
  windDirSinusSum += sin(radians(windDirection));
  windDirCoSinusSum += cos(radians(windDirection));

  if (windDirAverageCounter == 5)
  {
    // calculate the average wind direction.
    // convert result from Radians to Degrees
    atan2Dir = degrees(atan2((windDirSinusSum / windDirAverageCounter),
                             (windDirCoSinusSum / windDirAverageCounter)));

    // if the atan2 calculation result is negative, we need to add 360 to the result!
    if (atan2Dir < 0)
    {
      // multiplication by 10 is needed for round2int function
      windDirAverage = round2int((atan2Dir + 360) * 10);

      // sometimes we get 360 as result so we need to convert that to zero
      if (windDirAverage == 360)
      {
        windDirAverage = 0;
      }
    }
    else
    {
      // multiplication by 10 is needed for round2int function
      windDirAverage = round2int(atan2Dir * 10);
    }

    //Serial << "av: " << windDirAverage << endl << endl;

    // reset counter
    windDirAverageCounter = 0;
    windDirSinusSum = 0;
    windDirCoSinusSum = 0;

    windDirAverage = windDirAverage * 10;
  }
  // return windDirection;
  return windDirAverage;
}
#endif

#endif // End ID2