public IEnumerator LoadSensingPoint(JSONNode sensingPoint)
{
// foreach SensingPoint
GameObject obj = Instantiate (farmManager.sensingPointPrefab) as GameObject;
obj.transform.SetParent (transform);
FarmSensingPoint point = obj.GetComponent<FarmSensingPoint> ();
point.sensor = this;
point.resource = myResource;
farmSensingPoints.Add (point);
yield return point.StartCoroutine("Initialize", sensingPoint.Value);
yield return null;
}