diff --git a/app/api/controller/IndexController.php b/app/api/controller/IndexController.php
index 459c3c7..625b98c 100644
--- a/app/api/controller/IndexController.php
+++ b/app/api/controller/IndexController.php
@@ -19,6 +19,9 @@ class IndexController extends BaseController{
 
     public function mqtt(){
         $parmas=$this->request->post();
+        if(!$parmas|| !isset($parmas['username']) || $parmas['username']==''){
+            return json(['msg'=>'参数错误']);
+        }
         $data=[
             'username'=>$parmas['username'],
             'topic'=>$parmas['topic'],