public static function pts_monitor_update($sensor_list)
 {
     foreach ($sensor_list as $sensor) {
         $sensor_value = phodevi::read_sensor($sensor);
         if ($sensor_value != -1 && pts_module::is_file('logs/' . phodevi::sensor_object_identifier($sensor))) {
             pts_module::save_file('logs/' . phodevi::sensor_object_identifier($sensor), $sensor_value, true);
         }
     }
 }