diff --git a/pyhon/appliance.py b/pyhon/appliance.py
index d7cb836..eb13e12 100644
--- a/pyhon/appliance.py
+++ b/pyhon/appliance.py
@@ -302,8 +302,6 @@ class HonAppliance:
             "statistics": self.statistics,
             "additional_data": self._additional_data,
         }
-        if self._extra and data.get("attributes"):
-            data = self._extra.data(data)
         if command_only:
             data.pop("attributes")
             data.pop("appliance")
diff --git a/pyhon/commands.py b/pyhon/commands.py
index a78e1b8..5c45795 100644
--- a/pyhon/commands.py
+++ b/pyhon/commands.py
@@ -2,6 +2,7 @@ import logging
 from typing import Optional, Dict, Any, List, TYPE_CHECKING, Union
 
 from pyhon import exceptions
+from pyhon.exceptions import ApiError
 from pyhon.parameter.base import HonParameter
 from pyhon.parameter.enum import HonParameterEnum
 from pyhon.parameter.fixed import HonParameterFixed
@@ -111,9 +112,12 @@ class HonCommand:
         params = self.parameter_groups.get("parameters", {})
         ancillary_params = self.parameter_groups.get("ancillaryParameters", {})
         self.appliance.sync_to_params(self.name)
-        return await self.api.send_command(
+        result = await self.api.send_command(
             self._appliance, self._name, params, ancillary_params
         )
+        if not result:
+            raise ApiError("Can't send command")
+        return result
 
     @property
     def categories(self) -> Dict[str, "HonCommand"]:
diff --git a/pyhon/connection/api.py b/pyhon/connection/api.py
index ce223cc..6eebc7b 100644
--- a/pyhon/connection/api.py
+++ b/pyhon/connection/api.py
@@ -1,6 +1,7 @@
 import json
 import logging
 from datetime import datetime
+from pprint import pformat
 from typing import Dict, Optional
 
 from aiohttp import ClientSession
@@ -188,6 +189,7 @@ class HonAPI:
             if json_data.get("payload", {}).get("resultCode") == "0":
                 return True
             _LOGGER.error(await response.text())
+            _LOGGER.error("%s - Payload:\n%s", url, pformat(data))
         return False
 
     async def appliance_configuration(self) -> Dict:
diff --git a/pyhon/exceptions.py b/pyhon/exceptions.py
index 64e8648..e4fa290 100644
--- a/pyhon/exceptions.py
+++ b/pyhon/exceptions.py
@@ -12,3 +12,7 @@ class NoSessionException(Exception):
 
 class NoAuthenticationException(Exception):
     pass
+
+
+class ApiError(Exception):
+    pass
diff --git a/pyhon/parameter/base.py b/pyhon/parameter/base.py
index 1ef4ee8..5111258 100644
--- a/pyhon/parameter/base.py
+++ b/pyhon/parameter/base.py
@@ -28,8 +28,8 @@ class HonParameter:
         self.check_trigger(value)
 
     @property
-    def intern_value(self) -> str | float:
-        return str(self._value) if self._value is not None else ""
+    def intern_value(self) -> str:
+        return str(self.value)
 
     @property
     def values(self) -> List[str]:
diff --git a/pyhon/parameter/enum.py b/pyhon/parameter/enum.py
index b9074c7..2dd2633 100644
--- a/pyhon/parameter/enum.py
+++ b/pyhon/parameter/enum.py
@@ -27,6 +27,10 @@ class HonParameterEnum(HonParameter):
     def values(self, values) -> None:
         self._values = values
 
+    @property
+    def intern_value(self) -> str:
+        return str(self._value) if self._value is not None else str(self.values[0])
+
     @property
     def value(self) -> str | float:
         return clean_value(self._value) if self._value is not None else self.values[0]
diff --git a/setup.py b/setup.py
index b350076..d9dbcd6 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@ with open("README.md", "r") as f:
 
 setup(
     name="pyhOn",
-    version="0.12.2",
+    version="0.12.3",
     author="Andre Basche",
     description="Control hOn devices with python",
     long_description=long_description,