void loadModule()
 {
     try
     {
         using (var db = new db.pb_TunnelVisualizarDatabaseEntities())
         {
             if (db.sensors.Count() > 0)
             {
                 foreach (var dbSensor in db.sensors)
                 {
                     this.sensor_unit_grid.Children.Add(new SensorUnit(dbSensor));
                 }
             }
             else
             {
                 this.sensor_unit_grid.Children.Add(new StackPanel()
                 {
                     Children = { new Label()
                                  {
                                      Content = "no component added in database"
                                  } }
                 });
             }
         }
     }
     catch (Exception e)
     {
         this.sensor_unit_grid.Children.Add(new StackPanel()
         {
             Children = { new Label()
                          {
                              Content = e.Message
                          } }
         });
         SystemConsole.setConsoleTxt(e.Message);
     }
 }