diff --git a/app/Iot/BiAng/HttpClient.php b/app/Iot/BiAng/HttpClient.php
index e91bdb3..46e855a 100644
--- a/app/Iot/BiAng/HttpClient.php
+++ b/app/Iot/BiAng/HttpClient.php
@@ -28,7 +28,7 @@ class HttpClient
             ]
         );
 
-        return $result['data'];
+        return $result['data'] ?? [];
     }
 
     /**
@@ -43,7 +43,7 @@ class HttpClient
             ]
         );
 
-        return $result['data'];
+        return $result['data'] ?? [];
     }
 
     /**
@@ -58,7 +58,7 @@ class HttpClient
             ]
         );
 
-        return $result['data'];
+        return $result['data'] ?? [];
     }
 
     /**
@@ -75,7 +75,7 @@ class HttpClient
             ]
         );
 
-        return $result['data'];
+        return $result['data'] ?? [];
     }
 
     /**
@@ -92,7 +92,7 @@ class HttpClient
             ]
         );
 
-        return $result['data'];
+        return $result['data'] ?? [];
     }
 
     public function get(string $url, array $query = []): array