diff --git a/pyhon/appliance.py b/pyhon/appliance.py
index 0bc2814..c2d8cd9 100644
--- a/pyhon/appliance.py
+++ b/pyhon/appliance.py
@@ -1,12 +1,12 @@
 import importlib
 import logging
 from contextlib import suppress
+from datetime import datetime, timedelta
 from typing import Optional, Dict, Any
 from typing import TYPE_CHECKING
 
 from pyhon import helper, exceptions
 from pyhon.commands import HonCommand
-from pyhon.parameter.base import HonParameter
 from pyhon.parameter.fixed import HonParameterFixed
 
 if TYPE_CHECKING:
@@ -16,6 +16,8 @@ _LOGGER = logging.getLogger(__name__)
 
 
 class HonAppliance:
+    _MINIMAL_UPDATE_INTERVAL = 5  # seconds
+
     def __init__(
         self, api: Optional["HonAPI"], info: Dict[str, Any], zone: int = 0
     ) -> None:
@@ -30,6 +32,7 @@ class HonAppliance:
         self._attributes: Dict = {}
         self._zone: int = zone
         self._additional_data: Dict[str, Any] = {}
+        self._last_update = None
 
         try:
             self._extra = importlib.import_module(
@@ -205,7 +208,12 @@ class HonAppliance:
         self._statistics = await self.api.load_statistics(self)
 
     async def update(self):
-        await self.load_attributes()
+        now = datetime.now()
+        if not self._last_update or self._last_update < now - timedelta(
+            seconds=self._MINIMAL_UPDATE_INTERVAL
+        ):
+            self._last_update = now
+            await self.load_attributes()
 
     @property
     def command_parameters(self):
@@ -216,12 +224,20 @@ class HonAppliance:
         result = {}
         for name, command in self._commands.items():
             for key in command.setting_keys:
-                setting = command.settings.get(key, HonParameter(key, {}, name))
+                setting = command.settings.get(key)
                 result[f"{name}.{key}"] = setting
         if self._extra:
             return self._extra.settings(result)
         return result
 
+    @property
+    def available_settings(self):
+        result = []
+        for name, command in self._commands.items():
+            for key in command.setting_keys:
+                result.append(f"{name}.{key}")
+        return result
+
     @property
     def data(self):
         result = {
diff --git a/pyhon/commands.py b/pyhon/commands.py
index 9ed5d30..7e59c2a 100644
--- a/pyhon/commands.py
+++ b/pyhon/commands.py
@@ -29,6 +29,7 @@ class HonCommand:
         self._protocol_type: str = attributes.pop("protocolType", "")
         self._parameters: Dict[str, HonParameter] = {}
         self._data: Dict[str, Any] = {}
+        self._available_settings: Dict[str, HonParameter] = {}
         self._load_parameters(attributes)
 
     def __repr__(self) -> str:
@@ -46,6 +47,10 @@ class HonCommand:
     def parameters(self) -> Dict[str, HonParameter]:
         return self._parameters
 
+    @property
+    def settings(self) -> Dict[str, HonParameter]:
+        return self._parameters
+
     @property
     def parameter_groups(self) -> Dict[str, Dict[str, Union[str, float]]]:
         result: Dict[str, Dict[str, Union[str, float]]] = {}
@@ -76,10 +81,8 @@ class HonCommand:
                 self._data[name] = data
                 return
         if self._category_name:
-            if not self._categories:
-                self._parameters["program"] = HonParameterProgram(
-                    "program", self, "custom"
-                )
+            name = "program" if "PROGRAM" in self._category_name else "category"
+            self._parameters[name] = HonParameterProgram(name, self, "custom")
 
     async def send(self) -> bool:
         params = self.parameter_groups["parameters"]
@@ -119,7 +122,7 @@ class HonCommand:
         return first
 
     @property
-    def settings(self) -> Dict[str, HonParameter]:
+    def available_settings(self) -> Dict[str, HonParameter]:
         result: Dict[str, HonParameter] = {}
         for command in self.categories.values():
             for name, parameter in command.parameters.items():
diff --git a/pyhon/helper.py b/pyhon/helper.py
index 9ee8c75..2472499 100644
--- a/pyhon/helper.py
+++ b/pyhon/helper.py
@@ -1,6 +1,3 @@
-from pyhon.parameter.base import HonParameter
-
-
 def key_print(data, key="", start=True):
     result = ""
     if isinstance(data, list):
@@ -47,21 +44,12 @@ def pretty_print(data, key="", intend=0, is_list=False, whitespace="  "):
     return result
 
 
-def get_parameter(command, parameter):
-    if programs := command.categories:
-        for program in programs.values():
-            if data := program.settings.get(parameter):
-                return data
-    return command.settings.get(parameter)
-
-
 def create_command(commands, concat=False):
     result = {}
     for name, command in commands.items():
         if not concat:
             result[name] = {}
-        for parameter in command.setting_keys:
-            data = get_parameter(command, parameter)
+        for parameter, data in command.available_settings.items():
             if data.typology == "enum":
                 value = data.values
             elif data.typology == "range":
diff --git a/setup.py b/setup.py
index 4d35641..4f5c66b 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@ with open("README.md", "r") as f:
 
 setup(
     name="pyhOn",
-    version="0.10.0",
+    version="0.10.1",
     author="Andre Basche",
     description="Control hOn devices with python",
     long_description=long_description,