diff --git a/app/.env.example b/app/.env.example
index 2d1e293..5722df4 100644
--- a/app/.env.example
+++ b/app/.env.example
@@ -1,8 +1,8 @@
-FLASK_PORT=5000
+FASTAPI_PORT=8000
 MQTT_HOST=io.adafruit.com
 MQTT_PORT=1883
 ADAFRUIT_USER=tuankiet0303
 ADAFRUIT_KEY=
+
 MONGO_USER=root
-MONGO_PASSWORD=example
-HUGGINGFACE_KEY=
\ No newline at end of file
+MONGO_PASSWORD=example
\ No newline at end of file
diff --git a/app/Utils/convert.py b/app/Utils/convert.py
new file mode 100644
index 0000000..84fb9e3
--- /dev/null
+++ b/app/Utils/convert.py
@@ -0,0 +1,14 @@
+from typing import Any
+
+from bson import ObjectId
+
+
+def convert_objectid(data: Any) -> Any:
+    if isinstance(data, list):
+        return [convert_objectid(item) for item in data]
+    elif isinstance(data, dict):
+        return {key: convert_objectid(value) for key, value in data.items()}
+    elif isinstance(data, ObjectId):
+        return str(data)
+    else:
+        return data
diff --git a/smarthome/.env.example b/smarthome/.env.example
index 404de0e..5343892 100644
--- a/smarthome/.env.example
+++ b/smarthome/.env.example
@@ -1,2 +1,3 @@
-VITE_FLASK_HOST=http://127.0.0.1
-VITE_FLASK_PORT=8000
+VITE_FASTAPI_HOST=127.0.0.1
+VITE_FASTAPI_PORT=8000
+VITE_HUGGINGFACE_KEY=
\ No newline at end of file