diff --git a/app/Http/Controllers/DeviceController.php b/app/Http/Controllers/DeviceController.php
index aa0a7f5..1e1b2fc 100644
--- a/app/Http/Controllers/DeviceController.php
+++ b/app/Http/Controllers/DeviceController.php
@@ -338,8 +338,17 @@ class DeviceController extends Controller
         $data = [];
         foreach ($getArr as $column){
             $data[$column] = [];
+            $_value = null;
             foreach($xKeys as $key){
-                $data[$column][$key] = $datalist[$key][$column] ?? null;
+                if($datalist[$key][$column] ?? null){//如果存在数据则暂存该值
+                    $_value = $datalist[$key][$column];
+                }
+                //判断是否超过离线时间；
+                if(true){//未超过， 判断和设备离线时间关系-todo
+                    $data[$column][$key] = $_value;
+                }else{
+                    $data[$column][$key] = $datalist[$key][$column] ?? null;
+                }
             }
         }
         return $this->json($data);