diff --git a/kasa/aestransport.py b/kasa/aestransport.py
@@ -142,12 +142,11 @@ def hash_credentials(login_v2: bool, credentials: Credentials) -> tuple[str, str
     def _handle_response_error_code(self, resp_dict: Any, msg: str) -> None:
         error_code_raw = resp_dict.get("error_code")
         try:
-            error_code = SmartErrorCode(error_code_raw)  # type: ignore[arg-type]
+            error_code = SmartErrorCode.from_int(error_code_raw)
         except ValueError:
             _LOGGER.warning("Received unknown error code: %s", error_code_raw)
             error_code = SmartErrorCode.INTERNAL_UNKNOWN_ERROR
-
-        if error_code == SmartErrorCode.SUCCESS:
+        if error_code is SmartErrorCode.SUCCESS:
             return
         msg = f"{msg}: {self._host}: {error_code.name}({error_code.value})"
         if error_code in SMART_RETRYABLE_ERRORS:

diff --git a/kasa/exceptions.py b/kasa/exceptions.py
@@ -4,6 +4,7 @@
 
 from asyncio import TimeoutError as _asyncioTimeoutError
 from enum import IntEnum
+from functools import cache
 from typing import Any
 
 
@@ -63,6 +64,12 @@ class SmartErrorCode(IntEnum):
     def __str__(self):
         return f"{self.name}({self.value})"
 
+    @staticmethod
+    @cache
+    def from_int(value: int) -> SmartErrorCode:
+        """Convert an integer to a SmartErrorCode."""
+        return SmartErrorCode(value)
+
     SUCCESS = 0
 
     # Transport Errors

diff --git a/kasa/smartprotocol.py b/kasa/smartprotocol.py
@@ -241,12 +241,12 @@ async def _handle_response_lists(
     def _handle_response_error_code(self, resp_dict: dict, method, raise_on_error=True):
         error_code_raw = resp_dict.get("error_code")
         try:
-            error_code = SmartErrorCode(error_code_raw)  # type: ignore[arg-type]
+            error_code = SmartErrorCode.from_int(error_code_raw)
         except ValueError:
             _LOGGER.warning("Received unknown error code: %s", error_code_raw)
             error_code = SmartErrorCode.INTERNAL_UNKNOWN_ERROR
 
-        if error_code == SmartErrorCode.SUCCESS:
+        if error_code is SmartErrorCode.SUCCESS:
             return
 
         if not raise_on_error: