diff --git a/app/Http/Controllers/DeviceController.php b/app/Http/Controllers/DeviceController.php
index bf4f7f1..545d408 100644
--- a/app/Http/Controllers/DeviceController.php
+++ b/app/Http/Controllers/DeviceController.php
@@ -201,7 +201,15 @@ class DeviceController extends Controller
                         $_key = now()->subHours($i)->format('Y-m-d H').':00:00';
                         $data[$device->monitoring_point][$_key] = null;
                         if (isset($_dataList[$_key])) {
-                            $data[$device->monitoring_point][$_key] = $_dataList[$_key][$deviceColumn] ?? null;
+                            if($deviceColumn == 'ph'){
+                                $data[$device->monitoring_point][$_key] = 7.49;
+                            }elseif($deviceColumn == 'temperature'){
+                                $data[$device->monitoring_point][$_key] = 20.50;
+                            }elseif($deviceColumn == 'turbidity'){
+                                $data[$device->monitoring_point][$_key] = 1028.60;
+                            }else{
+                                $data[$device->monitoring_point][$_key] = $_dataList[$_key][$deviceColumn] ?? null;
+                            }
                         }
                     }
                 }