   setSyncInterval( 10 );
   
   attachInterrupt( ppsPin, ppsSvc, RISING );
+//  rotorDriveUpdate.priority( 64 ); // Default is 128, lower is higher
+//  rotorDriveUpdate.begin( rotorSvc, rotorUpdateInterval );
 }
 
 void loop() {

    Serial.print( "GPS Flags:" );Serial.print( gpsTFFlg );
    Serial.println( gpsZDAFlg );
  }
}

void procZDAMsg() {

const int eeaddrAzPotMin = eeaddrAzPotWest + sizeof( int );
const int eeaddrAzPotMax = eeaddrAzPotMin + sizeof( int );
const int eeaddrElPot0 = eeaddrAzPotMax + sizeof( int );
const int eeaddrElPot90 = eeaddrElPot0 + sizeof( int );

 /*
 * Copernicus II configured for two NMEA sentences every 60 seconds:
