if(_statusled_timer < now) {
    if(lastframe_time+5000 < now) {
      // no gps communication  
      _statusled_state = !_statusled_state;
      digitalWrite(13, _statusled_state ? HIGH : LOW);   // set the LED off
      _statusled_timer = now + 1000;
      return;
    }
        
    if(_statusled_blinks==0) {
      if(i2c_dataset.status.gps3dfix == 1)
        _statusled_blinks=3;
      else if(i2c_dataset.status.gps2dfix == 1)
        _statusled_blinks=2;
      else
        _statusled_blinks=1;      
    }
    
    if(_statusled_state) {
      _statusled_blinks--;
      _statusled_state = false;
      _statusled_timer = now + ((_statusled_blinks>0) ? BLINK_INTERVAL : 1000);
      digitalWrite(13, LOW);   // set the LED off
    } else {
      _statusled_state = true;
      _statusled_timer = now + BLINK_INTERVAL;
      digitalWrite(13, HIGH);   // set the LED on
    }
  }
}